I just received one of the 40 size WM P-51's as a gift, not for any special occasion, just out of the blue....nice! Never worked with World Model planes before and wondered if it is a decent plane? I do have a Saito 72 coming back from repair and a OS 46 FX on the bench. Don't know if a 13-6 prop on the Saito would have clearance problems, It was close on my Pizzaz and ended up putting on larger wheels to gain some ground clearance. Which would you recommend(72 or 46)? Also have a Futaba flight pack with S3004 servos and was wondering if these would suffice, as no torque recommendations were in the so called manual.

Thanks,

Mike

A guy in my club has one, and it flies great. He has the Yellow one with a YS 53, and he raves about it.

It does cut a gorgeous picture as it goes by with the gears up,

Steve

I love mine. Bilt easy and flys better. I have an OS 70 4 stroke in mine. Nothing like a plane that picks it's feet up when it is done with them.

Put the Saito 72 in it. IMHO, a Mustang doesn't sound right when powered by the OS 46FX or any other 2-stroke engine. You should not have ground clearance issue with the 13x6 prop.

Here is my WM P51. They use to come as ARC so I could cover it myself. I run a ST G90 with a 12/10apc. I guess this can give and idea of how much to go eh? Go with that fourstroke you have. Rund it inverted and you wont have to mess up the cowl on the sides or top.

I have the Miss America with a Saito 72, and use an APC 13x6. JR radio gear, standard servos. No prop clearance problems, Been flying this plane for one year now and still love this plane! Enjoy it!

I just got my WM dago red p51 and love it. It was a snap to put together and flew great. Guys at my field were saying I shoud have put a 70 in it but I had a Os SF46 laying around and decided to try it. It flies great even with the 46, fast, stable. Like everyone says about this plane, it doesnt slow down too much for landings, So give yourself some room to bring her in. My next P51 will be a warbird scheme with the 4 stroke in it.

I've had two of these birds, one with a T.T.46 Pro and the other with a K&B Screamin 48. Both engines were inverted with stock mufflers.
It's not uncommon to find these planes powered with 91 4 strokes but the gear wire is a little soft and needs to be adjusted offten but it's easy to do. Mine was clocked at 98 mph while entering the traps after a dive with the K&B engine.

That is one great flying model. I've seen engines from plain bearing .40's to ST .90"s fly, and never a problem. Lands almost as slow as a low wing trainer, and Wm sells parts if you ding your fighter!

Soft landings always,

Bob of Maui

The 3004's will work just fine, had 'em in mine.

Dave.

I had an OS 46 fx in my Miss America version, it was running a 10x7 prop and it hauled A$#. The retracts held up well on my grass field. This plane flew great with the engine and if you mount it sideways all that will need to stick out is the cylinder head and carb opening, no muffler or anything else. No overheating problems either. It might just be me, but a 4 stroke engine doesn't sound any better, just different a 2 or 4 stroke engine that is less than 1 cu in. will sound like a little model no matter what. I live in Oklahoma and I was very comfortable flying this plane in 20+ mph winds with my setup. All in all it is an excellent plane, capable of tons of maneuvers.

I have a Dago with a TT46 and a bisson pitts muffler. I use Hitec 425's. The engine tacks about 14,400 with a 10x6 APC. Several other guys in my club have the WM p51 with same engine. Makes for a great afternoon of informal races.

YS 53 up front, open pipe, sounds great! 12 x 6 prop, moving up to 13 x 6 on next engine. No clearance problems, easy soft landings.

Agree 100% on the low pass, gear up fly by's. They look and sound great! Third season. Just pulled engine tonight for another project (Yellow 30 sized Sukhoi 31M) and will install YS63. Great airplane. I recovered the tail in bright yellow and added some other minor scale details. Also sprayed overall with flat clear. Sorry about the fuzzy picture, 3 seaons ago, pre-digital camera!

I have a Dago with a Saito .72 in it. Great combination. Great flying airplane. Balance came out right on the mark with the Saito.

I have the WM Dao Red with a saito 91 the thing fly's sweet 13 x 8 prop no problem

I ran an O.S. .91 4-stroke in my Dago Red....If I were
to use a two stroke....it would be a Rossi .61.

Inverted, of course....and the muffler will clear the
left side of the cowling.

SEE YA !!!!

Dave.

I have a Miss America. Originally powered it with an OS .70 and 12x7 props - it was nice.

Current setup is a Saito .91 and a 13x8 prop. It is Faster

Still looking for more speed, though. I have an APC 11x12 prop which I plan to try on it, but I'll have to save that one for a windy day as douby that such a teeny prop will provide much in the way of braking when it comes time to slow down . . .

visioneer_one, if you are looking for more speed for your Miss America, trying sticking either a YS FZ63 or a YS FZ91 in it. Those engines haul *****. I have a YS 63 in my 40-size Zero, spinning a Graupner prop at 11,200 rpm. My Zero has the same speed and vertical performance as an H9 Mustang powered by a Saito 100. We were flying together, and the Mustang couldn't overtake me at full throttle. I was definitely faster than a 40-size Mustang powered by a Saito 80.

Richard L,

Is that World Model Zero? What prop ru running? What is the weight of the Zero? The YS 63 at 11,200 rpm will unload in the air. Wouldn't it approach the 12000 design limit RPM?

Sorry for the barrage of questions but I too am trying to overtake a 61FX (11X7 prop) powered WM Zero.

Thanks
Hisham

GAGAK, that's a VQ Zero. It weighs 7 lbs. 1.8 oz. I asked Dave Shadel in the YS Engines Support Forum about the high RPM, and he said it was fine. In fact, he said that you'll encounter problems if you run the YS 63 too slow. Here is the link to the thread:

http://www.rcuniverse.com/showthread...52&forumid=156

My YS 63 peaks out at around 11,500 rpm..

Richard L,

Thank u for the link and according to Barry's thrust, hp calculator ur going at 76.23 mph. For those interested u can download the calculator here:

http://www.bmaps.net/

Hisham

I had a YS .63 on my Ultra Stick 40. I really like this engine, and considered getting another one for the Mustang. I ended up picking up a YS .91AC in the swapshop, but have decided against using this one on the Mustang as it weighs quite a bit more than the Saito. Out field is on the small (and rough!) side, so heavy planes tend not to last long.

The YS .91 will be going onto my UCD3D.

Well, I tried out an APC 11x12 "Pattern" prop this weekend. My Saito .91 turned this prop 9550 rpm when richened for flight.

The result - 90+ MPH cruising at WOT, easily 100+ while diving. Vertical is not unlimited, but there's plenty. This prop is actually a lighter load on the engine as it unloads quite a bit in the air. I can't even describe how smoothly it runs whilke at speed!

The downside? Very strong P-factor which increases while accelerating. The plane will pull slightly to the left, which made it a little more difficult to fly traditional oval race lines... had to trim in a little rudder to counteract. Forget about prop braking effect. We had minimal wind yesterday, and all my landings except one went long.

It also isn't a real "thrusty" prop. The plane was more aerobatic at lower speeds with the bigger diameter prop. No surprise there.

The verdict? I'm keeping this prop handy for windy days, and will try a 13x7 / 12x8 for calm days.

Did I mention the rain yesterday? I guess not.

"Passing clouds" we call them. Big 'ol angry rainclouds that dump huge amounts of water in a short time.

What follows represents the field after ~3 minutes of *hard* rainfall.



The water level was higher than what you see above. When I pulled the bird from under the jeep the bellypan was *full* of water. Good thing its made of fiberglass.

Mental note. Don't Park In The Low Spot Anymore!