CA1065829A - Powder and water mixing and dropping system on board an aircraft - Google Patents
Powder and water mixing and dropping system on board an aircraftInfo
- Publication number
- CA1065829A CA1065829A CA253,187A CA253187A CA1065829A CA 1065829 A CA1065829 A CA 1065829A CA 253187 A CA253187 A CA 253187A CA 1065829 A CA1065829 A CA 1065829A
- Authority
- CA
- Canada
- Prior art keywords
- powder
- water
- injection
- group
- containers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
- A62C3/0228—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires with delivery of fire extinguishing material by air or aircraft
- A62C3/0242—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires with delivery of fire extinguishing material by air or aircraft by spraying extinguishants from the aircraft
Abstract
ABSTRACT OF THE DISCLOSURE
A powder and water mixing system which is operatively mounted onboard an aircraft and uses water scooping to automatically produce onboard mixing of powder and water. This system is particularly adapted to drop a fire retardant powder and water mixture from a flying aircraft and includes a pair of tanks, powder containers fore and aft of the tanks, water scoops projecting from the bottom of the aircraft, a pair of powder injection and powder and water mixing devices connected each to a tank, to a water scoop, and to a group of powder containers, a powder container selec-tion valve interposed between each injection and mixing device and the corresponding group of powder containers, and a control connected to each selection valve and arranged to empty a powder container forward of the tanks concurrently with a powder container aft of the tanks, sequentially with water scooping passes by the aircraft.
A powder and water mixing system which is operatively mounted onboard an aircraft and uses water scooping to automatically produce onboard mixing of powder and water. This system is particularly adapted to drop a fire retardant powder and water mixture from a flying aircraft and includes a pair of tanks, powder containers fore and aft of the tanks, water scoops projecting from the bottom of the aircraft, a pair of powder injection and powder and water mixing devices connected each to a tank, to a water scoop, and to a group of powder containers, a powder container selec-tion valve interposed between each injection and mixing device and the corresponding group of powder containers, and a control connected to each selection valve and arranged to empty a powder container forward of the tanks concurrently with a powder container aft of the tanks, sequentially with water scooping passes by the aircraft.
Description
~6~ !3Z~
T~i s invention relates to a system for distri-bution of a powder and water mixture from a flying aircraft, and more particularly, to a system of the type adapted to be carried onboard a water scooping aircraft to produce a powder and water mixture upon scooping of water and to provide for dropping of the mixture from the flying aircraft~
The use of a fire retardant and water mixture to extinguish fires, such as forest fires, has been proposed and the use of an aircraft to drop the fire retardant and water mixture over a fire has also been proposed before now. ~Iowever, so far the fire retardant powder and water have been mixed and thereafter loaded onboard -the aircraft at a ground base. This is not fo~md convenient due in particular to the flying distance and time required to reach the properly equipped ground base, and to the extra personnel and time used to effect the mixing and loading operation.
It is a general object o~ the present invention to provide a powder and water mixing system which is particularly adapted to produce mi~ing of powder and water onboard an aixcra~t~
It is an object of the present invention to provide a powder and water mixing system which is associated to water scooping by the aircraft to produce onboard mi~ing under the effect of the scooping action, and more specifi-cally, to use the inflow of water produced by the water scooping action to inject the powder into mixture wi-ch the water.
T~i s invention relates to a system for distri-bution of a powder and water mixture from a flying aircraft, and more particularly, to a system of the type adapted to be carried onboard a water scooping aircraft to produce a powder and water mixture upon scooping of water and to provide for dropping of the mixture from the flying aircraft~
The use of a fire retardant and water mixture to extinguish fires, such as forest fires, has been proposed and the use of an aircraft to drop the fire retardant and water mixture over a fire has also been proposed before now. ~Iowever, so far the fire retardant powder and water have been mixed and thereafter loaded onboard -the aircraft at a ground base. This is not fo~md convenient due in particular to the flying distance and time required to reach the properly equipped ground base, and to the extra personnel and time used to effect the mixing and loading operation.
It is a general object o~ the present invention to provide a powder and water mixing system which is particularly adapted to produce mi~ing of powder and water onboard an aixcra~t~
It is an object of the present invention to provide a powder and water mixing system which is associated to water scooping by the aircraft to produce onboard mi~ing under the effect of the scooping action, and more specifi-cally, to use the inflow of water produced by the water scooping action to inject the powder into mixture wi-ch the water.
- 2 -~65~Z~
It is a mor2 specific object o. tha pres~nt invention to provide a powder and water mixing system on-board an aircxa~t wherein the water is provided b~.successive water scoopings by the airc:aft and predetermined loads o~
powder are automatically mixed with the water se~uentially and under the action of the successive water scoopinys, during any sortie of the aircraft.
According to the present invention, the powder and water mixing and dropping system onboard an aircraft comprises a powder injection and powder and wa-tex mi~iny device having a water inlet, a powder inlet, and a mixture outlet, a water droppiny tank connected to the m.ixture out-let to receive a powder and water mixture ~rom the mi.xi.ng device, a wa-ter scoop projecting unc~er the a.;.rcraft and connected to said water inlet to supply water ko the injec-tion and mixing device, powder container means, a powder distribu-~ion device communi.cating the powder container means `
with the powder inlet and adapted to selectively dispen~e powder to the powder and water mlxing device, and a control connected to tho pow~ler ~i~tribu~ion device and con~tructed and arranyed to se~uentially actuate the latter and allow injection of powder into the injection and mixing device for mi~incJ with scoopcd wa-tor~ .
The powdqr container msans ~ffectively includes a plurality of powder containing bins arranged fore and aft of the center of gravity of the aircraft, a compressed air supply pump is connected to each of the bins to fluidize the
It is a mor2 specific object o. tha pres~nt invention to provide a powder and water mixing system on-board an aircxa~t wherein the water is provided b~.successive water scoopings by the airc:aft and predetermined loads o~
powder are automatically mixed with the water se~uentially and under the action of the successive water scoopinys, during any sortie of the aircraft.
According to the present invention, the powder and water mixing and dropping system onboard an aircraft comprises a powder injection and powder and wa-tex mi~iny device having a water inlet, a powder inlet, and a mixture outlet, a water droppiny tank connected to the m.ixture out-let to receive a powder and water mixture ~rom the mi.xi.ng device, a wa-ter scoop projecting unc~er the a.;.rcraft and connected to said water inlet to supply water ko the injec-tion and mixing device, powder container means, a powder distribu-~ion device communi.cating the powder container means `
with the powder inlet and adapted to selectively dispen~e powder to the powder and water mlxing device, and a control connected to tho pow~ler ~i~tribu~ion device and con~tructed and arranyed to se~uentially actuate the latter and allow injection of powder into the injection and mixing device for mi~incJ with scoopcd wa-tor~ .
The powdqr container msans ~ffectively includes a plurality of powder containing bins arranged fore and aft of the center of gravity of the aircraft, a compressed air supply pump is connected to each of the bins to fluidize the
- 3 -.
~ i58~5~
powder and facllitate the flow thereo~ out o~ che bins, a pair o~ powder distribution valve devices define a plural-ity o~ powder inlets connecte~ to the powder containing bins respectively, each powder distribution valve device has a powder outlet connected to one i.njection and mixing device, a first group of air supply valves are connected to the group of bins respectively, forward of the center of gravi-ty, a second group of air supply valves are connected to the group of bins respectively aft of -the center of gravity and the control is connected to the powder dis-tribution valve devices and to the air supply valves to sequentially actuate the same and empty each forward bin concuxrently with a corresponding aft bin.
The above and other objec1t.s ancl advantagas o~ the present invention will be better understood with reference to the following detailad description o~ a pre~erred embodi-ment thereof which is illustrated, by way of example, in the accompanying drawings; in which:
Figure 1 .is a schematic diagram o~ a powder and wat~r mixing and droppiny system accordin~ to the present in~ention;
Figure 2 is a top plan view of the system o~
Figure 1 operati~el~ mounted onboard an aircra~t;
Fiyure 3 is a side elevation view o~ the syst~m shown in Figure 2; and ~36~15 2~
Figure 4, on the same shee-t of drawings as Figure .
2, is a side elavation ~iew of a powder distr.ibution device forminy part of the present invention.
As illustrated in Figures 2 and 4, the powder and water mixing and dropping sys-tem is operatively mounted onboard an aircraft schematically represented by part of the fuselage 1, the wing 2, and the wheel 3. It must be noted that this aircraft is provided with a fuselage which allows amphi~ious operation as well as normal landing and ta~e off..
More particularly, the po~rder and water mixin~
and dropping system includes a pair o liquid tanXs 4 and 5 symmetrically mounted w.ith respect to the center o:E gra~i-ty of thc aircra~t~ r~hc tanks are ,pro~idecl each with a bot~om door, not shown, whic'h selectively opsns to outwardl~r drop the liquid rom the tank. Roller beds, each ormed of a pair parallel roller runs 6, are fixed on the floor of the aircraft fore and aft of the liquid tanks ~ and 5. rt'~le two roller run~ 6 of each roller bed axe laterally spaced apaxt for a purpos~ which wi.ll be better understoofl lator~
Genorally cylindxic~l powc~er containers 7 are mounted on th~ roller beds both ~ore and aft of the tanks
~ i58~5~
powder and facllitate the flow thereo~ out o~ che bins, a pair o~ powder distribution valve devices define a plural-ity o~ powder inlets connecte~ to the powder containing bins respectively, each powder distribution valve device has a powder outlet connected to one i.njection and mixing device, a first group of air supply valves are connected to the group of bins respectively, forward of the center of gravi-ty, a second group of air supply valves are connected to the group of bins respectively aft of -the center of gravity and the control is connected to the powder dis-tribution valve devices and to the air supply valves to sequentially actuate the same and empty each forward bin concuxrently with a corresponding aft bin.
The above and other objec1t.s ancl advantagas o~ the present invention will be better understood with reference to the following detailad description o~ a pre~erred embodi-ment thereof which is illustrated, by way of example, in the accompanying drawings; in which:
Figure 1 .is a schematic diagram o~ a powder and wat~r mixing and droppiny system accordin~ to the present in~ention;
Figure 2 is a top plan view of the system o~
Figure 1 operati~el~ mounted onboard an aircra~t;
Fiyure 3 is a side elevation view o~ the syst~m shown in Figure 2; and ~36~15 2~
Figure 4, on the same shee-t of drawings as Figure .
2, is a side elavation ~iew of a powder distr.ibution device forminy part of the present invention.
As illustrated in Figures 2 and 4, the powder and water mixing and dropping sys-tem is operatively mounted onboard an aircraft schematically represented by part of the fuselage 1, the wing 2, and the wheel 3. It must be noted that this aircraft is provided with a fuselage which allows amphi~ious operation as well as normal landing and ta~e off..
More particularly, the po~rder and water mixin~
and dropping system includes a pair o liquid tanXs 4 and 5 symmetrically mounted w.ith respect to the center o:E gra~i-ty of thc aircra~t~ r~hc tanks are ,pro~idecl each with a bot~om door, not shown, whic'h selectively opsns to outwardl~r drop the liquid rom the tank. Roller beds, each ormed of a pair parallel roller runs 6, are fixed on the floor of the aircraft fore and aft of the liquid tanks ~ and 5. rt'~le two roller run~ 6 of each roller bed axe laterally spaced apaxt for a purpos~ which wi.ll be better understoofl lator~
Genorally cylindxic~l powc~er containers 7 are mounted on th~ roller beds both ~ore and aft of the tanks
4 and 5. The group of powder cont.a.iners 7 ~orward o~' t'he tarl'ks has the same number o:E containers as the group aft of the tanks such that for each powder container forward of the ta.nks there is a corresponding powcler container aft ~6~3Z9 of ~ha tan~s, and vice versa. Each powder container is of ~he bin type as identi~ied by the tradem æk PHOS-BIN of Monsanto Company. Each of these bins includes a plastic base 8 having a dow~ard projection 9 laterally guided between the two runs 6 of the supportin~ roller bed~
; Essentially, each such bin 7 has its plastic base 8 formed with a compressed air inlet diametrically alignea with a powder and air outlet, not shown, and is arranged such that the inward flow of compressed air fluidizes the powder to facilitate outward flow thereof. The powder containing bins 7 are firmly held in place by tie down straps 10 suit-ably connected thereto and to the internal structure o~ the aircraft.
A pair o~ water scoops 11 project downwardly from the bottom of the ~uselage to pick up water upon forward displacement of the aircraft on a body of water such as a lake or a river. Each water scoop is connected to an upwardly extending tube 12.
A pair o~ powder injection and powder and water mixing devices 13 and 14 extend Lengthwise o~ the aircraft ~;
and are firmly held in elevated position by any appropriate bracket or straps, not shown. Each powder injection and powder and water mixing device includes an outlet tube 15 for the powder and water mixture, and water inlet tube 16 e~nnected to the upward tube 12 and of decreasing cross section at its outer end to merge with the outlet mixing tube 15. The injection and mixing device also includes a powder ! ' .
~C3 658~:9 injection or inlet tube 17 of smaller diame-ter than the water inlet tube 16 and engaging in the latter, as shown by the dotted lines in Figures 1, 2, and 3~ I-t may be noted that the internal end of the powder inlet tube 17 is coaxial with the water inlet tube 16 to leave an annular internal space around the latter o smaller cross sectional area than ~he water inlet tube. The wa-ter is kherefore accelerated in passing through the annular space thus creat-ing a vacuum to draw the powder rom the containers and to inject it into the outlet mixing tube 15 from where it is discharged into the tank 4 or 5 through a tu~e 18.
A pair of powder dis-tribution ~al~e devices 19 are mounted fore and aft respectively of the li~uid tanks 4 and 5. As best seen in Figure 4, each powder distributi.on valve device 19 includes a pair of sector shape side walls between which is pivoted a -tube 20 about a pivot 21 defining a pivot axis extending transversely through th~ pivoting tuhe. The latter constitutes the outlet oE the ~alve de~ice 19 and is connected to a ~lexible tube 22 which at its o~her end is connected to the tubular powAer inlet 17 o~ the corresponding injection and mixing device 13 or 14. rrhe other end Oæ the pivoting tube 20 is slidabl~ engaged in mutu~lly :Eacing guideways 23 secured against the inner side of the sid~ walls, respectively. Five tubular powder inlets 24 axe fixed in spaced apart relationship along the arc shape edge of the two side walls of the valva device 19.
A powder dispensing tube 25 is connectad between the powder 6~1~Z~
outlet at the base of each bin 7 and a corresponding inlet 24 of the corresponding powder distribution valve device l9o As can be seen in the drawings, the forward bins 7 are sequentially connected to the powder inlets 24 of the forward valve device 19 while the aft bins 7 are sequenkially connected to the powder inlets 24 of ~e aft valve device 19. An actuator 26 is connected to each pivot or shaft 21 to sequentially pivot the corresponding tube 20 for sequen-tial endwise re~istry thereof with the powder inlets 25.
As now shown in Figure 1, a pump or compressor 27 is mounted o~board the aircra~-t and is connected via a pair of compressed air lines 28 to ten compressed air supply valves 29 of the solenoid type arranged in two groups fore and a~t respectively o~ the water tarlks 4 and 5c The air compressor or pump 2~ i.s energized by a conductor 30 connected to control switch 31 praferably .installed in t~e cockpit of the aircra~t. An indicator light 32 is pre~erc~bly connected to the air compressor 27 to indicate th~ reguired pressure level ~or proper operation of the system. ~ach o~
the solenoid valves 29 and the 5-way rotary actuators 26 is electrically connected to five (S) contacts 33 of the control switch 31 such that rotary stepwise actuation o~
the latt~r will produce sequ~ntial operation of the air supply valves 29 and o~ the distribution valve de~ice 19.
A compressed air supply tube or line 34 connects each air supply valve 29 to the compressed air inlet o~ the corresponding bin.
~ 8 \ ~
~5~6~i8Z~31 Before takeoff, the powder containing bins 7 are loaded and secured onboard by the straps 10 and the compressecl air tubes 34 and the powder and air outlet tube 25 are connected to the bases 8 of the bins 7. When the aixcraft is lowered and travels on a bod~ o~ water, the actuation of the control sw~.tch 31 causes the pivoting tube 20 of each powder distribution valve device 19 to register with one of the powder inlets 24. An air supply valve 29 forward of the center of gravity and a correspon-ding air.supply valve 29 aft of the center of gravity are also actuated such that compressed a.ir is blown in the base :.
8 oE the corresponding forward bin and aft bin. This happens simultaneously with water scooping by the scoops 11. The water inflow produced by the water scoopi.ng produces injec-tion of the powder f~om the forward 'bin 7 into the injection and mixing device 13 concurrently with injection of the .
powder from the aft bin into the injection and mixing device 14. ~he mixing process extends alony the tubes 15 and 18 and khe mixtures are captured in the tanks 4 and 5 respectivel.y to 'be cdropped at a .selectecl site ~xom the fl~lng aircra~t~ ; ' For subsec~uent second, third, fourth, and Ei~th water scoop-ings, the other bins are similarly emptied in pairsO AEter all ~le 'bins 7 have been emptied, the a.ircxa~'t must return to a ground station to replace the 'bins~ :
It must be noted that the system o:E the present invention is designed for use of a f.ire retardant powder in the 'bins 7 'but it is applicable as well to other powder such ._ g _ . .
~ -~651~3Z9 as fertilizers.
It must be noted that changes in the details of construction ma~ be made without departing from the principle and scope of the invention as defined in the appended claims. ~or instance, the predeterminecl quanti- ~ -ties or loads of powder can be supplied o-therwise than by .~:
bins of prede-termined size and/or powder load.
; Essentially, each such bin 7 has its plastic base 8 formed with a compressed air inlet diametrically alignea with a powder and air outlet, not shown, and is arranged such that the inward flow of compressed air fluidizes the powder to facilitate outward flow thereof. The powder containing bins 7 are firmly held in place by tie down straps 10 suit-ably connected thereto and to the internal structure o~ the aircraft.
A pair o~ water scoops 11 project downwardly from the bottom of the ~uselage to pick up water upon forward displacement of the aircraft on a body of water such as a lake or a river. Each water scoop is connected to an upwardly extending tube 12.
A pair o~ powder injection and powder and water mixing devices 13 and 14 extend Lengthwise o~ the aircraft ~;
and are firmly held in elevated position by any appropriate bracket or straps, not shown. Each powder injection and powder and water mixing device includes an outlet tube 15 for the powder and water mixture, and water inlet tube 16 e~nnected to the upward tube 12 and of decreasing cross section at its outer end to merge with the outlet mixing tube 15. The injection and mixing device also includes a powder ! ' .
~C3 658~:9 injection or inlet tube 17 of smaller diame-ter than the water inlet tube 16 and engaging in the latter, as shown by the dotted lines in Figures 1, 2, and 3~ I-t may be noted that the internal end of the powder inlet tube 17 is coaxial with the water inlet tube 16 to leave an annular internal space around the latter o smaller cross sectional area than ~he water inlet tube. The wa-ter is kherefore accelerated in passing through the annular space thus creat-ing a vacuum to draw the powder rom the containers and to inject it into the outlet mixing tube 15 from where it is discharged into the tank 4 or 5 through a tu~e 18.
A pair of powder dis-tribution ~al~e devices 19 are mounted fore and aft respectively of the li~uid tanks 4 and 5. As best seen in Figure 4, each powder distributi.on valve device 19 includes a pair of sector shape side walls between which is pivoted a -tube 20 about a pivot 21 defining a pivot axis extending transversely through th~ pivoting tuhe. The latter constitutes the outlet oE the ~alve de~ice 19 and is connected to a ~lexible tube 22 which at its o~her end is connected to the tubular powAer inlet 17 o~ the corresponding injection and mixing device 13 or 14. rrhe other end Oæ the pivoting tube 20 is slidabl~ engaged in mutu~lly :Eacing guideways 23 secured against the inner side of the sid~ walls, respectively. Five tubular powder inlets 24 axe fixed in spaced apart relationship along the arc shape edge of the two side walls of the valva device 19.
A powder dispensing tube 25 is connectad between the powder 6~1~Z~
outlet at the base of each bin 7 and a corresponding inlet 24 of the corresponding powder distribution valve device l9o As can be seen in the drawings, the forward bins 7 are sequentially connected to the powder inlets 24 of the forward valve device 19 while the aft bins 7 are sequenkially connected to the powder inlets 24 of ~e aft valve device 19. An actuator 26 is connected to each pivot or shaft 21 to sequentially pivot the corresponding tube 20 for sequen-tial endwise re~istry thereof with the powder inlets 25.
As now shown in Figure 1, a pump or compressor 27 is mounted o~board the aircra~-t and is connected via a pair of compressed air lines 28 to ten compressed air supply valves 29 of the solenoid type arranged in two groups fore and a~t respectively o~ the water tarlks 4 and 5c The air compressor or pump 2~ i.s energized by a conductor 30 connected to control switch 31 praferably .installed in t~e cockpit of the aircra~t. An indicator light 32 is pre~erc~bly connected to the air compressor 27 to indicate th~ reguired pressure level ~or proper operation of the system. ~ach o~
the solenoid valves 29 and the 5-way rotary actuators 26 is electrically connected to five (S) contacts 33 of the control switch 31 such that rotary stepwise actuation o~
the latt~r will produce sequ~ntial operation of the air supply valves 29 and o~ the distribution valve de~ice 19.
A compressed air supply tube or line 34 connects each air supply valve 29 to the compressed air inlet o~ the corresponding bin.
~ 8 \ ~
~5~6~i8Z~31 Before takeoff, the powder containing bins 7 are loaded and secured onboard by the straps 10 and the compressecl air tubes 34 and the powder and air outlet tube 25 are connected to the bases 8 of the bins 7. When the aixcraft is lowered and travels on a bod~ o~ water, the actuation of the control sw~.tch 31 causes the pivoting tube 20 of each powder distribution valve device 19 to register with one of the powder inlets 24. An air supply valve 29 forward of the center of gravity and a correspon-ding air.supply valve 29 aft of the center of gravity are also actuated such that compressed a.ir is blown in the base :.
8 oE the corresponding forward bin and aft bin. This happens simultaneously with water scooping by the scoops 11. The water inflow produced by the water scoopi.ng produces injec-tion of the powder f~om the forward 'bin 7 into the injection and mixing device 13 concurrently with injection of the .
powder from the aft bin into the injection and mixing device 14. ~he mixing process extends alony the tubes 15 and 18 and khe mixtures are captured in the tanks 4 and 5 respectivel.y to 'be cdropped at a .selectecl site ~xom the fl~lng aircra~t~ ; ' For subsec~uent second, third, fourth, and Ei~th water scoop-ings, the other bins are similarly emptied in pairsO AEter all ~le 'bins 7 have been emptied, the a.ircxa~'t must return to a ground station to replace the 'bins~ :
It must be noted that the system o:E the present invention is designed for use of a f.ire retardant powder in the 'bins 7 'but it is applicable as well to other powder such ._ g _ . .
~ -~651~3Z9 as fertilizers.
It must be noted that changes in the details of construction ma~ be made without departing from the principle and scope of the invention as defined in the appended claims. ~or instance, the predeterminecl quanti- ~ -ties or loads of powder can be supplied o-therwise than by .~:
bins of prede-termined size and/or powder load.
Claims (6)
1. A powder and water mixing and dropping system onboard an aircraft, said system comprising a powder injec-tion and powder and water mixing device having a water inlet, a powder inlet, and a mixture outlet, a water dropping tank connected to the mixture outlet to receive a powder and water mixture from the injection and mixing device, a water scoop projecting under the aircraft and connected to said water inlet to supply water to the injection and mixing device, powder container means, a powder distribution device communicating said powder container means with said powder inlet and adapted to selectively inject powder to said powder and water mixing device, and a control connected to said powder distribution device and constructed and arranged to sequentially actuate the latter and allow injection of powder into said injection and mixing device for mixing with scooped water in the latter.
2. A powder and water mixing and dropping system as defined in claim 1, wherein said powder container means includes a plurality of powder containers, said powder distribution device has an outlet connected to said powder inlet and a plurality of powder inlets connected to said powder containers respectively, valve means connected to said powder containers, and said control is connected to said valve means and is arranged to sequentially actuate the latter and sequentially empty said powder containers in the water dropping tanks through said powder distribution device and injection of the powder in the injection and mixing device.
3. A powder and water mixing and dropping system as defined in claim 2, further comprising compressed air supply means defining an compressed air outlet, an air supply selection valve means constituting said valve means and having an inlet connected to said compressed air outlet and a plur-ality of outlets connected to said powder containers respectiv-ely, and said control being connected to said air supply selection valve means and arranged to sequentially actuate the latter for powder fluidization and emptying of said powder containers in the water dropping tank through said powder distribution device.
4. A powder and water mixing and dropping system as defined in claim 3, wherein said powder containers consti-tute a first group of powder containers mounted in the aircraft forward of the center of gravity thereof, a second group of powder containers are mounted in the aircraft aft of the center of gravity thereof, said valve means includes a first group of air supply valves and a second group of air supply valves, said plurality of outlets of said valve means constitutes a first group of air outlets connecting said first group of air supply valves respectively to said forward powder containers, another group of air outlets connect the second group of air supply valves to said powder containers respectively of the second group, and said control is connected to the air supply valves of the first group and to the air supply valves of the second group for powder fluidization and emptying of each forward container concurrently with a corresponding aft container.
5. A powder and water mixing and dropping system as defined in claim 4, wherein said powder injection and powder and water mixing device, said water dropping tank, said water scoop, and said powder distribution device constitute a first powder injection and powder and water mixing device, a first water dropping tank, a first water scoop, and a first powder distribution device respectively, and the mixing and dropping system further includes a second powder injection and powder and water mixing device, a second water dropping tank, a second water scoop, and a second powder distribution device, the second powder injection and powder and water mixing device has a water inlet, a powder inlet, and a mixture outlet, the second water dropping tank is connected to the mixture outlet of the second injection and mixing device, the second water scoop projects under the aircraft and is connected to the water inlet of the second injection and mixing device to supply water thereto, the second powder distribution device has an outlet connected to the powder inlet of the second injection and mixing device and has a plurality of power inlets connected to the powder containers respectively of the second group; the selective air supply valve means includes a first group and a second group of air supply valves, said air supply valves has each an inlet connected to the compressed air outlet and an outlet connected to said powder containers respectively, and said control is connected to said air supply valves and arranged for powder fluidization and emptying of each forward container concurrently with a corresponding aft container.
6. A powder and water mixing and dropping system as defined in claim 4, wherein said powder distribution device includes a plurality of tubular powder inlets connected to the plurality of powder containers respec-tively, a tube pivotally connected for sequential endwise registry with any one of said tubular powder inlets and communicating with said powder inlet of the injection and mixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA253,187A CA1065829A (en) | 1976-05-25 | 1976-05-25 | Powder and water mixing and dropping system on board an aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA253,187A CA1065829A (en) | 1976-05-25 | 1976-05-25 | Powder and water mixing and dropping system on board an aircraft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1065829A true CA1065829A (en) | 1979-11-06 |
Family
ID=4106033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA253,187A Expired CA1065829A (en) | 1976-05-25 | 1976-05-25 | Powder and water mixing and dropping system on board an aircraft |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1065829A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480100A (en) * | 2013-10-10 | 2014-01-01 | 黄天久 | Portable forest fire extinguisher |
-
1976
- 1976-05-25 CA CA253,187A patent/CA1065829A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480100A (en) * | 2013-10-10 | 2014-01-01 | 黄天久 | Portable forest fire extinguisher |
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