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If a careful start up, taxi, run-up and extra checklist followed because of the payload and mission, I'd say more like 10 to 20 minutes. Even in the tropics, I don't see the engine oil warming up to TO temps in less than 5 minutes. Shoot, when I fly my 172 it could take 5 minutes just to get to the run-up area and that's when I'm the only one on the field!
Says the internet warrior to the aircraft engineer who works on aircraft every night and has years of experience doing so...
1 minute to start engines, warm up engines, run through pre-takeoff checks, taxi to the active, and take off?
I've never done that in 20 years of flying and crewing.
Not even an aircraft on standby that has been run up, been through all the checks and shut down waiting for a mission.
ou made a mistake and we can all see that.
See the next post. You are so quick to try and point out a perceived mistake in my post, but the idea that you would burn 20% of your fuel for warm-up and TO alone, goes right past you...
See the next post. You are so quick to try and point out a perceived mistake in my post, but the idea that you would burn 20% of your fuel for warm-up and TO alone, goes right past you...
" cannot exceed 1min" = actual TO run. The warm-up might be 10 min. The fuel allowance for warmup and TO in a Barracuda II = 14IG (merlin32) as per the Pilots Notes. Multiply that by four for a Lancaster, which would be less than 2% of a modded Lancaster's fuel capacity.
The fuel allowance for a Lancaster I/III to warmup, TO, and climb to 20K ft was 270IG:
http://www.wwiiaircraftperformance.org/Lancaster/Lancaster_I_III_ADS.jpg
Also note that internal fuel capacity with two internal aux tanks (Wellington tanks) = 2950IG.
as per the data card. Again, the idea that you could burn 20% on warm-up, and TO alone, is wrong, unless there was some reason to extend the warmup, beyond that needed for the mission.
Prove it.
I'm not going to discuss the fuel consumption percentage that you think you might burn during start up, taxi and takeoff until I go into the manual and see the actual numbers, as far as "the clock" is concerned - Start-up, 2 to 3 minutes, warm up, 10 minutes, taxi, 5 to 10 minutes, pre-takeoff run up, 10 minutes. You're burning a lot of fuel before you even take off.
Let's start here:
https://ww2aircraft.net/forum/attachments/lancaster-pdf.42884/
It goes past you too. You do realise Adler was a crew chief on military helicopters, don't you? So he kinda knows what he's talking about.
WW2 USAAF/USN airforces had a formula for determining range that included a specified allowance for warmup and TO. We are talking combat missions here and the aircraft can always be topped up prior to TO if the warm-up period is too long.
I'm not going to discuss the fuel consumption percentage that you think you might burn during start up, taxi and takeoff until I go into the manual and see the actual numbers, as far as "the clock" is concerned - Start-up, 2 to 3 minutes, warm up, 10 minutes, taxi, 5 to 10 minutes, pre-takeoff run up, 10 minutes. You're burning a lot of fuel before you even take off.
Let's start here:
https://ww2aircraft.net/forum/attachments/lancaster-pdf.42884/
Again, I'm not arguing your fuel flow, I'm arguing your first post about one minute on the ground! You seem to conveniently ignoring this!!!max fuel flow as per page 33 is is 500IG/hr. How long do you have to burn the engines at max fuel flow to equal 20% (600IG) fuel burn? 600IG fuel burn/500IG/hr = 1.2 hours or 72minutes! C'mon, no sane pilot is going to run his engines for 72mins at full throttle during Warm-up and TO.
I just did. Here's a question that maybe will help you understand your error.
Yea we are and I've used similar "formulas" displayed in chart form on civilian aircraft to calculate fuel burn during taxi and take off. You're going to calculate that into your flight. It is very unlikely you're going to shut down and top off fuel if you spend too much time on the ground and if you have any evidence of this happening during an actual combat mission, I'd like to hear about it. Bottom line, it's going to be more than one minute, even ten minutes from start up to take off in any 4 engine recip aircraft, especially if you're carrying bombs, let alone a nuke!