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#11
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"BUFDRVR" wrote...
96 tons of water!!!!! The hell with that, how about 400' AGL and only 140 KIAS? OK. I don't know where you saw 140 knots (I skimmed tie site, and didn't notice it). Numbers are for a -400, but -200 numbers should be similar: Call it 159 tons of airplane and 96 tons of water for ZFW of 255 tons. For a short cycle (2 hours airborne, plus reserve) try 35 tons of fuel, 1/3 of which has already been burned. GW at beginning of drop is about 280 tons. VREF for flaps 25 is 158 KIAS, so 170 KIAS is about the slowest I'd want to try. That is also the number given in a story in the Portland newspaper this morning. |
#12
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Cycle time between load and discharge and reload. To see a real water
bomber go to the Martin Mars Web site. Things are neat to watch. Talk about an overcast dropped just outside my town a couple years ago. Put out a 2 1/2 acre fire in about an hour. Dropped about 15 loads of water. Far more efficient than a 747. "Leadfoot" wrote in message news:Chpqc.69469$Fl5.45597@okepread04... http://tinyurl.com/2ejag 96 tons of water!!!!! |
#13
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Cycle time between load and discharge and reload. To see a real water
bomber go to the Martin Mars Web site. Things are neat to watch. Talk about an overcast dropped just outside my town a couple years ago. Put out a 2 1/2 acre fire in about an hour. Dropped about 15 loads of water. Far more efficient than a 747. But keep mind, not even considering the 747, dropping retardant and dropping water are two different operations with two different purposes. Water is put directly on a fire, retardant is typically put in the fires path to make a line... Ron Tanker 65, C-54E (DC-4) Silver City Tanker Base |
#14
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Oh and BUFDRVR, you might note of interest that the USFS aviation officer who
is determined to kill of the airtanker program, is an ex-Bone driver Guess we should have heeded your words about them earlier Ron Tanker 65, C-54E (DC-4) Silver City Tanker Base |
#15
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John R Weiss wrote:
The hell with that, how about 400' AGL and only 140 KIAS? OK. I don't know where you saw 140 knots I watched the mpeg on the site. The narrator said; "at 400' and 140 knots, the 747 can....." BUFDRVR "Stay on the bomb run boys, I'm gonna get those bomb doors open if it harelips everyone on Bear Creek" |
#16
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Ron wrote:
Oh and BUFDRVR, you might note of interest that the USFS aviation officer who is determined to kill of the airtanker program, is an ex-Bone driver Before JB asks, I will...what's his name? Guess we should have heeded your words about them earlier The ex-BUFF type Bone guys are ok though....right JB? BUFDRVR "Stay on the bomb run boys, I'm gonna get those bomb doors open if it harelips everyone on Bear Creek" |
#17
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Ron wrote:
Oh and BUFDRVR, you might note of interest that the USFS aviation officer who is determined to kill of the airtanker program, is an ex-Bone driver Before JB asks, I will...what's his name? LtC Tony Kern, from "Darker Shade of Blue" and "Rogue pilots" fame... Ron Tanker 65, C-54E (DC-4) Silver City Tanker Base |
#18
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"BUFDRVR" wrote...
I watched the mpeg on the site. The narrator said; "at 400' and 140 knots, the 747 can....." What do they call that in Marketing 101 -- "puffery"? |
#19
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John R Weiss wrote:
I watched the mpeg on the site. The narrator said; "at 400' and 140 knots, the 747 can....." What do they call that in Marketing 101 -- "puffery"? Seemed awful slow to me for a half million pound jet, but having never flown an aircraft with slats, I hear they're a wonderful device. BUFDRVR "Stay on the bomb run boys, I'm gonna get those bomb doors open if it harelips everyone on Bear Creek" |
#20
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Ron wrote: 96 tons of water!!!!! The hell with that, how about 400' AGL and only 140 KIAS? BUFDRVR We were a heck of a lot lower in the C-54 on our drops..I think with the pressuization system, they plan on dropping higher, but it will be hard to be precise at all, or go into canyons. The 747 will be good for a deluge from around 600-800 AGL, but its going to be a deluge, and not something that will be precise or that you can do with the "grubbies" nearby i know its an old thread, but why not? The Martin Mars can drop 7200 gallons in one go. You don't need to be precise with that sorta load. And have you seen a mars? They make the C-54 look small. |
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