Okay all you ARF guys. Here's your chance to give an old geezer your Honest opinion (operative word is honest) I am nearing completion of my fery first ARF. It is the Hangar 9 .60 size P-47, and I am deciding on the engine. I know for a fact that it will be an OS 4 stroke. The burning question here is which one. I have heard that the .91 is a good choice. My question is this... Would I be just as well off to use the 1.20 engine and practice throttle management ( I do know how to do this) since this model, by all accounts requires some extra ballast in the nose, and since I am a firm believer that weight should be functional (Larger heavier engine or Bigger more powerful batteries) or will the 1.20 engine shake the airframe to pieces? Give me your thoughts on this one please. I'll be good and not give any of my usual Smart A _ _ retorts. I promise

balsa,

I'm not very familiar with that plane but if nose weight is needed I'd go with the 1.20. The one I own is smooth as silk after a short warm up period. I just make sure my props are well balanced.

Everything I've heard says that the model requires up to 5 ounces of lead in the nose. I think that some of this is due to the fact that the rudder and elevator servos are tail mounted. Glad you responded. Did you get my e-mail about which dealership?

Did not get an email yet. I'm heading down in 2 weeks...I'll be in Orlando at Church Street Station, Kissimmee, "The Mouse House", Leesburg, and Gainsville doing some work

Another thing that may be possible to save some tail weight is make the rudder pull pull. I canot help much there. I have looked at it out of the box but that's my limit. I'll save those recommendations for someone that knows more about the plane.

Why don't you stop by the Dealership across from the Leesburg Airport (you know ...the one with the big blue bowtie on the dealership) And I'll stand you to lunch...that's the least I can do after ripping into you last week. I wuz wrong.
Bill

I would recommend a 1.20. Triple check the CG. My Modeltech was tail heavy and I have a OS 1.08 in the nose. Most warbirds come out tailheavy.

I am using a OS-91 FS in my H9 .60 P-47. It balanced perfectly with no ballast, however I do have an onboard glow driver with a C-cell battery mounted just behind the firewall. The plane is a joy to fly with plenty of reserve power. Either the OS-91 or 120 will make your Jug a terrific flyer.

Thanks Old Navy Flyer... (I usually go fly while my wife shops at old navy) I have considered a glow driver as well, since I forsee a problem with fuel flow due to the placement of the tank. Has anyone considered dropping the tank height to line up with the carb? I mean you gotta rebuild most of these things anyway (or so it seems) so how bout it?

I haven't heard of any problems of with the height of the fuel tank, but it could probably be lowered a bit. I mounted my engine at the recommended position and haven't had any problems with siphoning. I used the on board glow to get a slower, reliable idle.
John

Saito 100. No additional weight required. Fuel tank in stock location. Engine runs perfect. Plenty of power for this model.

balsabandit,

From one old geezer to another.........you'll love this plane. I was going gangbusters on mine and then some family emergencies waylayed me. I 'm back on it now and hope to have it in the air this spring. I'm using a SuperTigre G75 with in-cowl muffler and header. Had to get a bit creative because this same setup is designed for the Top Flite P47 but does not fit just right in this ARF. With some copper fittings from the local plumbing shop I fashioned a pretty darn nice exhaust system and it will all be within the cowl. I agree with Old Navy Flyer though.....the OS91FS would be a good match. That is the motor I'm using in my H9 AT6 and it works great. I'm also moving the servos from the tail into the main cavity in the fuselage and that should eliminate some of the weight that I read about that has to go into the nose........that and the copper manifold should help me balance out just right.

Cheers,
Andy

Thanks Guys.

I'm flying mine with an Evolution .61 and it flys "OK", just not a lot of vertical. Using a TF 12-6 prop and it is a *****cat to fly. If I had the option, it would be a Saito 100 up front.

YS 91 in mine.CG's fine with everything in the stock locations.

According to my dad (he flew the 1 to 1 scale 47's out of England), The only vertical the '47 ever did was straight down. The Zoom climb was an entirely different matter. I have no plans to try 3-D with a Jug.

Old Navy,
How the H*LL didja get that sumb***h in the cowl? Or didja just hawg out the fiberglass til' it fit? My Beautiful brand stinkin' new OS ,91 4 stroke won't fit in the factory position. Looks like I'm gonna havta invert it completely. Dang!!![:@]

balsabandit,
I posted a photo of my cowl in reply to your post on the build thread. I don't recall any real problem fitting the cowl over the engine... once I gave in and cut the hole for the head.
John