Hello all. I'm building a 60 size P-47 thunderbolt and I am thinking about putting a DLE 20ra in it. Will this be too big and too much engine for this plane? I want to go gas on this, so if it's too big in size and power, would a 15cc be better for it? Thanks for any advice.

A 20CC is almost twice the engine so yea I'd say too much. A 10 or 15 would be better

One bad thing about over powered planes is all that extra weight the plane has to drag around. Everything's fine as long as you have the throttle wide open but when you try to come in for a landing it's like asking a cinder block to glide.


carl

I had a 20cc in a H-9 Mustang and it was barely enough for that 60 size plane, so I don't see how a 15cc will be better.

Per the math a 20CC is a 120 glow.

The 20cc gassers have been used in many .60 size birds with much success and there is no reason it should not work just fine in your P-47. I am currently flying two 64 inch span Hellcats with 20cc gassers and while they are more power than needed they are certainly not too much. Scale models of radial engine warbird types almost always need nose weight to balance anyway so the use of the larger and heavier gassers does not necessarily lead to an increase in the finished weight. My .02 cents.

Hi!
And what does it weigh?

Yes and a 90 is marginal and the 120 is right.

Not sure what the finished weight is. For some reason 10 or 11 lbs sticks in my head. I'll check when I get home.

I just bought a new VQ P-40 (62 inch span) from JB Hobbies, and I was recommended to put my Zenoah 20 in it, I also have read many threads whereby people had put other 20cc gassers in their .60 size Warbirds with wing spans of 62 inches to 65 inches, I have also seen videos of these Birds flying with 20cc gassers, one guy did say that his 62" span H9 Hellcat flew heavy with his Zenoah 20 in it but the plane had unlimited vertical and was just a ball to fly,

I think the time has come with these 20cc Gassers where people have accepted the fact that if you want to burn cheaper fuel and fly with great power in your .60 size Bird you have to fly a heavier plane,

make sure you have good Retracts!

I tell you one thing, in my mind a .60 size 2St Glow engine is too small for a .60 size Warbird with mechanical Retracts and 8 servos (you have flaps), I say this cause I have a GP .60 size Shoestring (61 inch span) with an OS 61FX in it and I sure wish it was faster,

with the numbers I have read, it seams to me that the power is close between the 15cc Glows and 15cc Gassers, yet the Gassers are heavier, so a 15cc Gassers has significantly more powerful than an OS 61FX, I would much rather have a 15cc Gasser in my .60 size Warbird than a .61 Glow engine,

it's just the way the hobby is, it's 5/8ths of one thing and 5/16ths of something else, it never evens out LOL

Jim

I once had a .60 size TF P-47 ARF. I first put an OS 1.20 glow four stroke in it. Later I used a DLE 20cc in it. The 20cc was ideal. The plane needed the extra weight in the nose for balance and the 20cc provided good power and great idle.

I've been looking at the DLE20RA also for a Super Aeromaster I'm wanting to build. All things indicate it weighs less then an OS 1.20... that's including muffler on both engines, as well as the ignition module on the DLE. The only thing I didn't factor in was the ignition battery for the DLE.... of which is probably a few ounces for a good LiFe cell.

I was pretty surprised until I took a real hard look at the DLE. It's a much leaner looking engine then the 1.20 glow. That OS Surpass is a monster.

So yeah... do the math... and check the weights...as it's not as bad as some think. Tower's site has weight info on both engines, as well as the components. I'm starting to think it just makes more sense these days to go with the gas rigs... not to mention... the DLE20RA is going for about 285 with muffler/ign. and the OS1.20 was at $449 bucks... I just noticed the OS 1.20(no pump) is discontinued also...

I say do it... make it work... and you'll be pleased. I think it would go very nicely in the P-47. I'm about ready to order one up right now myself.

just for comparing,


DLE specs,
Weight: Engine: 22.93oz.(650g)
Exhaust: 1.76oz (50g)
Ignition: 4.23oz (120g)
Total: 28.9oz (820g)

accordingly to my OS 61FX 2St manual and the Saito site both the OS 61FX and Saito 100 weigh the same (550g),, while the newer Saito 125 weighs only 70g more, (70g = 2.46oz)


Saito's 20cc Gasser Total Weight with muffler and ignition is: 31.2 oz (884.51g)


but price is a different factor


http://saito-engines.info/specifications.html


Jim