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I would be nice if A2A included actual advanced procedures in their checklists. Nothing too detailed just the major problems like engine failure/fire, advanced aerobatics settings for spins, loops, barrel rolls, etc..., and escort/bombing techniques. And to include things like best glide speed (guessing around 140-160), recommended high key/low key (for dead stick landings), Maneuvering airspeed maybe with a VG diagram. I love this plane so much I'm thinking of doing an L/D chart to get a better picture of its flight envelope.

The flight characteristics in this plane are so amazing it really does feel like you're flying a heavy bird. I went back and flew the P-51 and it felt as though it was way too easy and unrealistic. Even though the p-51's eye candy is done very well it was too easy to fly and not complicated enough for my blood so I had to go back to the 47.

Kyle

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ASEL, AMEL, Commercial, Instrument.
Former Naval Aviator.

I have so far been unable to find best glide speed in the Jug.

Flight test setup:
Standard day 29.92 15C
Main tank 100%, Aux tank 0%, no ammo, wings clean, 100% oil, Ox, ADI.
Start at 5,500 MSL and I killed the engine and pulled to prop all the way back and established a wings level glide at a constant indicated airspeed. When deciding through 5,000 MSL I started my stopwatch. I stopped my stopwatch after passing through 4,000 MSL and recorded the time. No matter which airspeed I held from 110kts to 150kts the time was always 39 sec. which is about 1550 FMP descent rate. This would mean that the bottom of the L/D max curve is flat which is wrong. I would guess that the real P-47 best glide would be somewhere around 130kts indicated~150MPH. I will test a wider airspeed range later.

I was using shift+Z readings for airspeed since they are in knots and easier to hold a constant airspeed. Once I find the airspeeds I'm looking for I will convert them to MPH.

Is there any aeronautical engineers in here that can help in testing? Or Scott, do you know what the curve looks like? I don't know if this is a restriction in FSX or not.

Kyle

_________________

ASEL, AMEL, Commercial, Instrument.
Former Naval Aviator.

Very good topic to start. This most certainly does not appear to be correct.

BUMP. A2A Folks please weigh in on this!
Thanks.

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ASEL


Man is the victim of an environment which refuses to understand his soul.
Bukowski Pg. 172—Purple As an Iris—Tales of Ordinary Madness

phillik747,

It is very difficult to measure the best glide speed, but a good general rule I use is glide speed = stall speed X1.5. In this case, the stall speed of the P47 clean is 113mph, so the best glide speed should be approximately 170mph. Remember, we're looking at rate of descent and distance covered, not time.

I just ran a quick test and showed a best glide ratio to be around this number, favoring a little higher so just over 170. Remember, to pull the prop pitch back. A high pitch prop can cut your glide distance in 1/2.

Scott.

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A2A Simulations Inc.

Forgot about the 1.3 X Vso. Anyways I was looking at this book for reference.
http://books.google.com/books?id=-JnFk1v0W0sC&pg=PA165&lpg=PA165&dq=determine+best+glide+speed+l/d&source=bl&ots=DezDIlGHiZ&sig=47IKyaqAtS5N5LUd3ryNYJhWIPc&hl=en&ei=jIChSpzIJ4qxtgeplMibBQ&sa=X&oi=book_result&ct=result&resnum=7#v=onepage&q=determine%20best%20glide%20speed%20l%2Fd&f=false
If you look at the spreadsheet on page 164 that is what I'm basically trying to accomplish.

Thank you Scott for the reply.

_________________

ASEL, AMEL, Commercial, Instrument.
Former Naval Aviator.