OK, I'm stressing! I'd like to know if anyone out there runs a .60 sized two stroke in their sixty sized warbird, such as the H9 Mustangs or Corsair. I see that H9 has a new P-40 that will be out on the market in March. I've got the chance to save some money by getting a really good deal on a new .61 two stroke. I'd like to know what kind of performance people are getting out of their .60 engine/.60 warbird combo. Normally, I would put only a Saito on the nose, but I need to spend more money on a plane and a new engine about like I need a hole in my head. I had told myself that I wasn't buying any other planes or engines unless I sold something I already have, but you know how that goes.

Anyway, how well do these planes fly with .61 two strokes?

John

John,
I have both H-9 Coursair & P-51 , Saito 91 in both.
I would say a 60 is to small. I have a OS 60 2 strk on a .40 size Ultra Stick and its alot light that my Warbirds...

My 2 cents....Good Luck

It all depends on what kind of performance you looking for?. I usually run a 75 on my 60 size aircraft. I like a lot of vertical performance also look at the weight of a 60 size engine and a 75 size engine their normally bored out 60's and weigh about the same. You can always throttle back a bigger engine.

I have a 61 Thunder Tiger / 11.5 x 7 Bolly prpo in my Sportsman Aviation 60 size Spitfire and it really moves, most flying needs no more than half to three quarter throttle. It flies with good authority and gets off the ground very well.

Something like a TT61 will haul a 7.5 lbs plane with total ease ... mine did with a 12x8 prop. I think a decent 2C 60 sized engine will be able to haul a warbird up to 8.5 lbs but at that weight you cannot expect much other than scale flying.

I think the H9 P40 deserves a nice four stroke. There are some very capable four strokes that are inexpensive. Magnum 91 and THunder Tiger 91 are both good and should do weel in the P40. Normally prices from Tower for these are about $180. The Magnum goes on sale once in while for about $149. At this price I see no justifiable reason to buy a two stroke.

Hey John,


I have a Saito 100 in my H9 corsair.... flys great!

John

I fly my H9 mustang with a Saito 100, a club member uses a o.s. .61 with a pitts muffler. The flying characteristics are similar, I see no real difference between our birds. The biggest difference I can tell is that a 4s on a warbird just sounds better...lets you think it sounds more realistic...but of course you already know that..

Hello!
It's all about weight!
Light airplanes fly better and a ordinary warbird with a 160cm wing span weighting around 4-4,5kg will fly just fine on a 10cc (.61) twostroke, at least if you fly at sea-level.
Use a 12x6 or 13x5 APC prop and your plan will perform very good.
I have a MVVS 15cc two stroke in my Great Planes GEE BEE R-2 (weigh 5kg) and it has very good performance.

Regards!
Jan K
Sweden

Nah, it's not just about weight.
Some people feel their planes need to be able to take off with only a 10 foot roll. Anything more and the plane is underpowered.

Piper ... you mean you take 10' to lift off?! Man ... that is a really long roll out!!! Today I learnt about power and weight. Took my TT Spirit 3D out and tried straight up lift offs (not 10' roll out) ... once she lifts off it goes vertical ... its good fun!

The subject was warbirds, not helicopters or 3D planes, right?

*smack*

I have a 40 size Zero, a 60 size Sea Fury, and a 60 size Stuka. All of them needed nose weight to balance so don't let a heavier engine scare you off. I am using an FX46 in the Zero. Takes off and flies fast and furious! I have an FX60 in the Sea Fury, Takes off easily in about 50 feet and flys at a good clip. I have a TH 75 in the Stuka 60. Takes off in about 30 feet and flys very fast at 1/2 throttle! I usually throttle down to under 1/2 to keep the speed down. A 60 would have been plenty for it but the bigger engine doesn't hurt!