I'm about to be the new owner of an AT-6 Texan .60 size, 67.5" wingspan, AUW 7-8 lbs. powered by a Super Tigre Gs 4500.

I haven't flown glow in about 10 years but have a rather deep electric hangar, some foamies, some balsa converts. I'd like experienced glow pilots to sound off on the power train for my new AT-6.

Is it sufficient, overpowered, or underpowered? Obviously I want at least scale take offs, but does this power set-up have any extra oomph or is it going to fly scale?

I'll have a small team of glow pilots at the local AMA field helping me to run a thorough flight check and make sure she's airworthy, so not to worried about that part. I'd like to nip a lack of power in the bud before I even get that far.

Thanks and clear skies,

Dave

same as my one put a 90 4stroke in it ,,, it sounds more realistic and will give you superb realizism you wont regret the extra expense

Definetly deserves a 4-stroke, but can you tell me if it will be underpowered with my set up? I haven't bought it yet, but would like to know if the SUper Tigre Gs4500 will fly a 7-8 lbs plane well.

If it's a size .45 motor, isn't that too small?

I have a 60 sized P51 that weighs the same, I have an OS 70 FS mounted in it.

The sound is perfect, speed is as scale as I like and there is plenty of power to get me out of trouble.

I would recommend the same power plant to you... the 70 FS.

If what I read is correct, that engine is way overpowered for that airframe. 4.5 HP and 66 oz, should tear that 60 size airframe apart quite quickly. Are you actually referring to a .45? A 45 would be too small, 70 - 90 four stroke would be great, 60 - 75 two stroke would probably work alright.

Information below from the RCU product guide - http://www.rcuniverse.com/product_gu...ineCompare.cfm
Super Tigre
G-4500 Ring

Type: 2-Stroke
Displacement: 2.760 cu. in.
Cylinders: 1

General Specs:
- Bore: 1.750 (in.)
- Stroke: 1.420 (in.)
- Shaft: 10mm x 1.25 thread
- Low RPM: 1500
- High RPM: 8000
- HP: 4.500 bhp@8000 RPM
- Weight: 66.56 oz.

Applications:
- Giant
- Recreation
- Scale
- Sport

Agreed, that's a HUGE engine for that plane!

I flew mine very nicely on an OS 91FS 4 stroke. The 4500 is way too much engine for that plane.

Yeah I agree. I have a 60 P-51 and a .91 OS 4 stroke. Absolutely beautiful to fly! Too much engine with that 4500.

a OS 91 to 120 would be a great choice for any 60 size warbird in that wingspan and weight range.
overpowering it has no real benifit,as for a 70 fs probably a little less power than I would like but it would surely fly, I would say go with a 91,of the 4 60 size warbirds I have ready to fly 3 have 91 surpass engines,and 1 has a 120 surpass.

Are you saying you have the 4500 ST or the .45st?. If it is the .45, you should have at least a .90 on it.

Either way the .45 ST or the ST 4500 are both completely inappropriate and will only cause disaster.

Something is wrong with this picture. The bare 4500 likely with no muffler weighs 66 ounces, thats over four pounds. Now there is no way anyone can bring that airplane in at three to four pounds with everything less a bare engine to meet those figures.

Much more likely that the airplane is closer to 12 pounds.

John

There has been a rash of fake ID's and bogus questions in several forums this last week. Everyone be warned. There is a troller on the loose.

Well, I'm certainly not fake! I just bought the plane today and discovered it was the G 4500, it's the 2.76 cubic inch 4.2 hp motor, with some kind of tuned muffler!!! I was kinda suprised he sold it for so cheap as it's never been flown, motor isn't even broken in. It was just expertly assembled, he bought it not knowing a thing about RC at a garage sale, let it sit for a few months and decided to keep building his awesome muscle cars instead.

Thanks a lot on the advice. I think the builder and intended pilot must have been very experienced and was building it intentionally overpowered before circumstances forced him to sell it. But hearing everyones advice, I think what I'll do is sell the motor and get a more reasonably powered 4 stroke. I don't need to rip the wings off, and all that torque to get me out of trouble sounds good. Plus, of course, the sound of a 4 stroke just seems more proper on a warbird.

If I decide to just stick with the current crazy motor, is it going to be like unflyable? I'm not a complete doofus and understand throttle management, so couldn't I just use about 75% throttle for scale take offs and firewall it when I want to climb out like a 3d plane? Or is the danger of an uncontrolled torque roll just to great with this much motor?

And concerning the weight, you're probably right, it's closer to 10-12 lbs with the current motor. The manual says it's 7-8 lbs. but that's likely with a .45 size motor.

Thanks again and keep all this good advice coming! I need all the help I can get.

Dave

PS, check my join date if you're really concerned about wether I'm fake or not. I've been a member since 2006, just been spending most of my time over in Wattflyer under same ID, Capt. Yossarian (I'm the bombadier!!!). I've just recently found that I strangely miss the smell of glow in the morning.

I'll even post pics of me cuddling my new AT-6 as proof!
*Cue 'Flight of the Valkries' here*

The reason someone thinks this is a troll is because the idea is absolutely ridiculous. No, you can't fly a .60-size ARF with an engine like that.

It's conceivable that for some reason, it's not actually the G4500, but somehow he got the wrong manual? It has a big 90 on the motor it self. I'll try to get some pics by tommorrow, I'll take super close ups of the motor and the docs that came with the motor, which say it's a G 4500.

Dave

If there is a "90" stamped on the motor then you most likely have the .90 size 2-stroke SuperTigre. That would make a lot more sense and it is an appropriate engine for that plane.

Ah good, this is heartening news. Because it really doesn't look too big, but for some reason he has the doc's for the G 4500 which is discontinued anyway. Probably the original owner just gave him the wrong manual, because it definetly has a '90' stamped on it. Ah well, I was kinda hoping for an excuse to get a four stroke.

I'll still put up pics tommorrow, just to get a double check, but it's got to be the .90 size. It fits to nicely inside the cowl. I imagine the real G 4500 is enormous compared.

Dave

A .90 size glow on a plane with a 67" wingspan is still going to haul butt !!!! I have a rather heavy, early 1980's all wood (except for the MonoKote wing) Senior Falcon w/ 69" wingspan that runs a .60 and another lighter "trainer" with a 70" wingspan with an OS .60 glow. When we ran them up to test the throttle settings, I had to hold on with BOTH hands b/c that plane (even with an 11x8 prop) was pulling like an irritated OX!!! I was really suprised! Even when my instructor flew the lighter "trainer" he only opened it up to just over 1/2 and it was moving suprisingly fast.

The Texan is a low wing plane, so it's flight control surfaces are going to make it alot more maneuverable and have alot quicker reaction to inputs than my high-wings. I don't think I'd open it up to 75% unless you really like SPEED!!!! On the other hand, it sounds like you've got alot of expeience with how planes "generally act" in the air, so I have to warn you that you MAY have a case of "Perma-Grin" and sprain a cheek . It also sounds like you have enough sense to NOT do anything silly in the air and you know enough to keep it slow until you get familiar with the way it really moves at various speeds and conditions. The Texan is a nice plane and I'd hate to hear about you leaving a splintered plane because the speed helped it get away from you

Good luck with it in the air!!!!!! Let us know how it goes! I'm curious to see how a bird that size handles a .90 engine. It may be just right for it's airframe and you'll love it to death! I hope so

Walk away folks !!! Walk away. This is a Troll

I don't think so. I think it is just a case of someone who doesn't know much about glow engines. All of us were in that stage at one point or another.

I remember when I was first starting out I ordered a .40 2-stroke from Tower and they sent me an O.S. 1.20 4-Stroke by mistake. I had no idea what in the world that engine was for or how you could ever have a plane big enough to need something like that

Good idea, it may help us all establish exactly what you have.

Try to get pics from all available angles.

It would be nice to also remove the prop and cowl so the actual engine markings are visible in subsequent pics.

yossarian - I am a super tiger fanatic - and would definitely put a g90 in that plane. however, if this is your first glow engine I would recommend that you either
1. find someone who flies super tiger and knows how to tune it, or
2. buy and use whatever 90 size 2 stroke or 90-1.20 4 stroke is popular at your field.

this way you will have someone who knows the engine you are using to help you break it in and tune it.

however, if it is a g90 a g90 will fly that plane very well without a tuned muffler. but if noone at your field recognizes it when they see it get a different engine and save it for later.

so- show the plane to the guys at your field and see what they say.

Ed