# Looks like a Mustang?

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#### Pops

##### Well-Known Member
Log Member
When I was a kid living out in the woods with my grandfather the AG at Charleston, WV just got the P-51's after the war. On Sundays there would be a string of 51's coming from the south and making passes on a knoll about 1 mile north. Good airshow every nice Sunday. Still in love with P-51's
On my first job out of high school my boss was a Flying Tiger and then flew P-51's in the war. We always ate lunch together and he would tell me his war stories.

#### C Michael Hoover

##### Active Member
"We always ate lunch together and he would tell me his war stories. " Pops, You are very fortunate to have heard those first hand.

cmh

#### don january

##### Well-Known Member
Log Member
what a sweat heart and such great lines. Good job all.

#### Lendo

##### Well-Known Member
Did someone ask what the Airfoil is?
TIA
George

#### TXFlyGuy

##### Well-Known Member
Did someone ask what the Airfoil is?
TIA
George
Yes. Separate thread. Turns out this is a very nice airfoil, based on the analysis of an aeronautical engineer friend of mine.

It does not hit a "brick wall", or speed-brake, as does the standard wing.

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#### TXFlyGuy

##### Well-Known Member
Did someone ask what the Airfoil is?
TIA
George
This from my aeronautical engineer buddy:

The airfoil on your wing, from what I see, has a reflexed UPPER surface toward the TE. The 6-Series are early attempts at controlled pressure recovery on the upper surface, and are more noted for having under-camber toward the TE so as to drive more camber aft into the TE of the section. I've certainly not seen them ALL, but this doesn't appear to be a NACA 6 series shape.

Nor does it resemble Riblett - from what I did study of his work (mostly in the "GA" series he did) they look very close to 6-series. Harry did seem to improve on the 6-Series, though - he never was regarded as a true "professional" aerodynamicist by those who do work in an aero-science capacity either for the Govm't or some major airframer.

The section I see here resembles more of some of the work Richard Eppler did, in some of his "low reynolds number" airfoil applications. Attempting to maintain laminar flow well back in the section with max thickness and camber pretty far aft.

#### pantdino

##### Active Member
Robert at KAXS (SW Oklahoma) is building one - waiting til next year to buy the firewall forward engine (Did he say $30 grand or was it$40 G? A stupendous number anyway. Think its a Subaru conversion. The fuselage controls and electricals are about complete and made like only a manufacturer's field rep can
The current FWF is a GM LS3 430 or 480HP with the standard PSRU and 84" prop or a 480HP with a 90" prop and bigger PSRU.

#### Twister51

##### Member
I commend you for all your hard work. Seriously. Your T-51 is waaaay closer to the real thing than when Titan began selling these kits. However....

The vertical stab lines are still wrong, the cockpit position in relation to the overall length of the fuselage is off (cockpit is slightly too far aft), the gear doors are too 'square-ish'. Love your big prop and the longer wing. I hope you have a lot of fun with this!

(BTW, the S-51 has inner gear doors. The prototype did not at first, then they were installed but were removed because they were problematic. An S-51 builder designed new parts and new computer logic to sequence them correctly.) Cheers!

#### TXFlyGuy

##### Well-Known Member
I commend you for all your hard work. Seriously. Your T-51 is waaaay closer to the real thing than when Titan began selling these kits. However....

The vertical stab lines are still wrong, the cockpit position in relation to the overall length of the fuselage is off (cockpit is slightly too far aft), the gear doors are too 'square-ish'. Love your big prop and the longer wing. I hope you have a lot of fun with this!

(BTW, the S-51 has inner gear doors. The prototype did not at first, then they were installed but were removed because they were problematic. An S-51 builder designed new parts and new computer logic to sequence them correctly.) Cheers!
You are correct on your observations. The Titan gear doors are backwards, totally incorrect. We addressed that as best as we could. Note our doors are quite close to the P-51H model.

The tail section was designed larger than scale to make the aircraft better for x-wind flying.

Not sure about the cockpit location...I’ll post a few more photos soon. I think it is where it’s supposed to be. But our nose is about 4 inches longer with the heavy duty PSRU.

We really like the long wing and big prop. Looks much better, and should be the best performing T-51 to date.

#### Pops

##### Well-Known Member
Log Member
"We always ate lunch together and he would tell me his war stories. " Pops, You are very fortunate to have heard those first hand.

cmh
And the stories were before PC.

#### BrianW

##### Active Member
The current FWF is a GM LS3 430 or 480HP with the standard PSRU and 84" prop or a 480HP with a 90" prop and bigger PSRU.
Yes indeed! A variety of engines have been fitted: Rotax, BMW, Honda, GM Corvette, etc.

#### TXFlyGuy

##### Well-Known Member
This one has the GM LS376-495, GM factory Hot Cam. 525 hp on the dyno, but we will only use 412 hp.

#### Twister51

##### Member
@ TXFlyGuy - If you added 4" to the nose for your PSRU then that is the difference. Hope you fly soon!

#### TXFlyGuy

##### Well-Known Member
@ TXFlyGuy - If you added 4" to the nose for your PSRU then that is the difference. Hope you fly soon!
Yes, the new prop hub and HD Gearbox added 4 inches to the nose. Requiring a new nosebowl and spinner design.

#### TXFlyGuy

##### Well-Known Member
And another item...the canopy is just slightly larger than true 3/4 scale. Problem is, there are no 3/4 scale pilots, so it was enlarged just a bit.

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