Mon Oct 07, 2019 3:54 pm
Mon Oct 07, 2019 4:01 pm
Mike Banks wrote:Craig McBurney from Connecticut Corsair has been interviewed several times regarding this situation. Craig flew the 'All American' and '909' for Collings for a number of years in the 90's. The "jump to conclusions" mentality of one of our Connecticut senators is unfortunate. Keeping these aircraft flying in remembrance of those before us is near and dear to us all.
https://www.theday.com/article/20191006/NWS12/191009571
https://www.nbcconnecticut.com/on-air/a ... 32622.html
https://fox61.com/2019/10/06/piolt-refl ... -was-lost/
Mon Oct 07, 2019 5:15 pm
lucky52 wrote:In B-17 lingo, what does "blow out" mean in reference to the # 4 engine(if I heard that recording right)?
Mon Oct 07, 2019 6:02 pm
FutureCorsairOwner wrote:From conversations with some of those guys on their stops here in NC over the last few years, the turbos on the B-17 were safety-wired/ non-functional. The ones on the B-24 are fully functional, and I was told they use them on every takeoff/ climb out.
Mon Oct 07, 2019 6:07 pm
Mon Oct 07, 2019 6:39 pm
Mon Oct 07, 2019 6:48 pm
WIXerGreg wrote:Collings' website came back up today if anybody else wants to head over and spend some money with them. I have some B-17 and 24 stuff on the way!
Mon Oct 07, 2019 7:35 pm
Mon Oct 07, 2019 8:39 pm
p51 wrote:I know it's too early to speculate, but as Collings has the former Evergreen G model, I wonder if they'll paint her as 909?
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Mon Oct 07, 2019 9:44 pm
Mon Oct 07, 2019 9:46 pm
Tue Oct 08, 2019 10:51 am
Mark Sampson wrote:I'm speaking beyond my knowledge here, but are not the turbos on aircraft used to maintain power at high altitude (where warbirds no longer fly)?
Unlike a turbo'd automobile where the boost is for a burst of acceleration on demand.
Still a terrible tragedy- I'm sure that the pilots did their best.
Tue Oct 08, 2019 1:19 pm
GarryW wrote:Mark Sampson wrote:I'm speaking beyond my knowledge here, but are not the turbos on aircraft used to maintain power at high altitude (where warbirds no longer fly)?
Unlike a turbo'd automobile where the boost is for a burst of acceleration on demand.
Still a terrible tragedy- I'm sure that the pilots did their best.
While I'm not an aerospace engineer or A&P mechanic, that's only partially correct. I worked with stationary turbo diesel engines for years which while they never flew (on purpose), they are quite similar in operation. Turbos pressurize the intake tract when the engine is under load. In the case with my experience with industrial equipment, the engine was under load constantly while its power was being utilized...much in the same way aircraft engines operate. Automobiles are a different animal as you are only substantially loading the engine during acceleration or while towing a heavy load. Most times, most of the force keeping a car going down the road is the inertia of a 1+ ton vehicle rolling down the pavement, only a small amount of the energy the engine is capable of generating is being used (very light loading). In an aircraft, the engine has a constant, fairly high load that depends on several things like the pitch of the props or the angle of attack of the aircraft. The turbos are always supplementing the engine. The altitude comes into play since the air pressure is less the higher you go. The turbo helps to minimize that differential but as you go higher, the engine will still lose power...just not at as great of a rate. That said, a turbocharged engine that is rated at 1200hp I am assuming is rated at 1200hp on the ground...the higher you go, that number will still decline. For sake of discussion, at 20,000 ft a 1200hp normally aspirated engine may only be generating 800hp. Turbocharge that same engine and it will make 1000hp at altitude. If I'm incorrect, please someone with more knowledge correct me...I'm just going off what I've read and my understanding of physics as a mechanical engineer.
That said, the people claiming "Well, in WWII B-17's were able to make it back to base on 2 engines" is a bit of a logical fallacy. With fully operational turbos even at sea level, they had quite a bit more power than the warbirds flying today with disabled turbochargers. However, I'm sure in WWII configuration, even a bomber coming back after a bomb run was still significantly heavier than the aircraft flying today. Its all a balance of lift and thrust vs. drag and gravity (weight)...more to the point, there are more variables than just "if 'x', then 'y'".
Tue Oct 08, 2019 1:34 pm
Thanks for the suggestion. I was hoping to catch up to them to get a new 909 t-shirt. As they won't likely be making any more, so I went to the site and ordered a shirt and one patch for each plane that I've flown on...WIXerGreg wrote:Collings' website came back up today if anybody else wants to head over and spend some money with them. I have some B-17 and 24 stuff on the way!
Tue Oct 08, 2019 2:42 pm