Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Semi quick P-51

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Old 04-25-2007, 09:35 PM
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evan-RCU
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Default Semi quick P-51

I ordered one of the Great Planes combat P-51 Mustangs, $99 from Tower and there are additional discounts to bring that down. Anyway it's rated for a .15-.25 and of course we don't do recommended engines on this forum so it got a well broken in OS.32 with a peace pipe and an APC 8X8 prop. Three cheap mini servos, an old reciever and battery stuff way back in the fuse to balance it and away she goes.... 121mph straight and level on radar. Flys like its on rails. Not bad for the price.
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Old 04-25-2007, 10:08 PM
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Default RE: Semi quick P-51

What kind of radar gun are you using, want to get one but heard the Buschnell (sp?) don't work.
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Old 04-26-2007, 09:29 AM
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Default RE: Semi quick P-51

Pretty sure it is the Bushnell... works great when you fly dirrectly at the gun, if not it's hit and miss. But if you are getting a reading with the plane flying a tangent to the gun the reading will be lower than actual speed anyway. One of the other speed guys at our field, Guido, got it for under $100 and we use it alot.
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Old 04-26-2007, 09:35 AM
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Default RE: Semi quick P-51

That stang looks real nice !

Seems to be well built too....
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Old 04-26-2007, 10:44 AM
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Default RE: Semi quick P-51

I'm very surprised how well built. Other than fiberglass cowl it's all wood, I don't like the cheaper covering but.... Anyway the balance point is an inch in front f the spar and I ASSUMED that the spec was off an inch and tried to fly it balanced on the spar.... Well two wild hand launches/ crashes and the wing broke out the bulkhead in front of the wing and the wing hold down plate. It uses 1/4-20 nylon bolts and it broke one of them too. The shheting on the bottom forward of the wing was ripped out but that was the only place the covering was damaged. The thing is very over engineered I guess for combat use. Anyway the pictures you see are after fixing it and it looks almost new still, very rugged. A great value for $99.

Theres room for a MVVS .40 Q500 motor in there too!... Hmmmm... I'd have to use a really big battery stuffed in the tail then....

Ohh, with the .32 and a 1400ma battery it came in at 2.5lbs ready to fly with out fuel.... great wing loading.

A cheap way to get into semi quick speeds cheap...
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Old 04-26-2007, 01:53 PM
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Default RE: Semi quick P-51

Hummmmm

My little Jett 35 is all cleaned up and sitting in the engine cabinet, I wonder????????????? Stop it Evan, have way too many on the ceiling now.
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Old 04-26-2007, 06:38 PM
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Default RE: Semi quick P-51

I have well over 50..... at least this one was cheap...
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Old 04-26-2007, 07:37 PM
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Default RE: Semi quick P-51

yep, mine runs great with an old os 25sf
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Old 04-27-2007, 06:01 AM
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Default RE: Semi quick P-51

Did you have to reinforce the rudder and elevator? Have you had any problems with flutter? I have the gp corsair with an os 25 and its a blast.
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Old 04-27-2007, 07:44 AM
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Default RE: Semi quick P-51

No mods yet but yes I got flutter one time id a straight down full throttle dive. No damage haven't done full power dives again and no more flutter. Oh I did put a small square of hinge material between the strake at the front of the verticle stab and fuse and the bottom of the rudder and fuse to give it a stronger glue joint.

You have a point some king of bracing might be in order for the stabs to fuse.
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