RE: 90 sized engine recommendation
 

I have an ASP 1.08 2 stroke on the front of my U-can-do .60. The original carb was replaced with an O.S. carb... it hovers at a little over half throttle, will accelerate straight out of said hover nicely, knife edge loops (when I can manage to make my thumbs give the correct commands, anyways) and has been super reliable and easy to start.

RE: 90 sized engine recommendation
 

I've got a Webra .91 P-5 which i'm going to run on a Big Stick 60.

It should be a good match as it spins larger props than most other .91 2-strokes.

I've also got a 1.20AX in my Venus II and agree that itwould be way too much for a Big Stick.

RE: 90 sized engine recommendation
 

I had a goldberg ultimate 60 with that webra .91 on it...talk about an awesome combo, such a smooth running engine! It's getting hard to find parts for them now, right? I haven't found a needle valve for the carb yet, it got bent when I dumb thumbed it into the ground this summer ( belly towards me in knife edge about 15 feet off the ground and accidently snapped it over and didn't catch it)...I'm still sad.

RE: 90 sized engine recommendation
 

ST G90 for the price, the power, the ease of tune.
Just cant stand that ugly ass muffler.

http://www.youtube.com/watch?v=Y8-1i6Y4zYI

Seagull Exrta 300S 75/ST G90@14x4W APC 15% CoolPower MV

RE: 90 sized engine recommendation
 

Ditto,
And never buy a S.T.75 when you can buy a 90, their the same physical size.
The 90 is lighter and more powerful.

RE: 90 sized engine recommendation
 

I have a stik with a O.S. 60. It flys great with about 70 flights on the stik. of course you will need more than a 60 if u want vertical. the motor is from another plane and im aways able to hand flip just like my other 5 O.S. motors. and one of them is 10 years old. i never had any other brands, im sure there are other really great motors out there. but i have had zero problems. This is why i will stay loyal to O.S.
i have a 2ed stik thats not done, but i just got a O.S. 90 with a pitts that i will use next spring. anyone know of a good prop that i should start with?
thanks, tony

RE: 90 sized engine recommendation
 

Hello Hairy46,
I see you said u made yours a tail dragger thats what i want to do. did u use the same geer? also how far back from the firewall to the geer did u go? and last, how dos'e it handle on the ground now?
thanks for your help,
tony

RE: 90 sized engine recommendation
 

Tony from the front of the firewall to the front of the landing gear is 7 1/4 inch I beefed it up with ply and epoxy on the inside there before mounting the landing gear that came with it and used a Dubro 60 sized tail wheel assembly on it. it tracks very nice on the ground! Bob

RE: 90 sized engine recommendation
 

A good rule of thumb for a good handling taildragger is:

Have the main gear axle center line 2" ahead of the cg. As far as engines, my vote goes to the ST 90. Takes a bit more break in, but once it's broke in, it will last a long, long time. A Super Tigre engine is no more difficult to tune than any other engine, provided you know what you're doing and why you're doing it.

I refuse to buy an OS engine, the fact that they passed the buck and blamed the end users when their "wonderful" ABL cylinder liners peeled the plating doesn't speak too highly of their product support. That combined with the high cost of replacement parts leaves me feeling cold toward OS.

RE: 90 sized engine recommendation
 

DenverJayhawk

Let us know what engine you end up getting for your Big Stick 60.

big dan

RE: 90 sized engine recommendation
 

My TT .91 will outperform my old Surpass .91, perhaps on par with the newer Surpass. The manufacture power specs are meaningless, and OS numbers are very inflated. I don't recommend it for a beginner because of the long break in. Probably even longer than a Saito.

After thinking about this, if you want a cheap two stroke then try the Tower .75, a little more then the Fox .74 its stronger and will last a lot longer both are about the size of a .60. Four stroke, well for a beginner I suggest the OS or Magnum .91. The OS is more user friendly and better built. Saito's and others take longer to break in but last longer. IMO a .91 two stroke is too large for most beginners in this plane.

RE: 90 sized engine recommendation
 

The 1.20ax is ALOT of motor, my 12LB sig four star will go vertical with it...that 1.20 on the 60 stick is a serious over kill...

RE: 90 sized engine recommendation
 

SUPER TIGRE!

RE: 90 sized engine recommendation
 

I too run a 120ax in my gb ultimate. It is a lot of power but that is what the left tumb stick is for, besides you can run 5 or 10% in it to dial it down or put a larger lower pitch prop on it. There are guys swinging 17" props on it. 120ax Best bang for the buck and it is not much heavier than a 91fx. an once or 2...

Why bother with a 91 when u can get a 120 for 20-30 more dollars?

I also use magnums. I had a 91 (4 cycle) in my twist 60 and on 15% the power was terrible but after I burned her in with a few galons I switched to 30% heli. lol LOADS of power! She ran better too, tranisioned better, back fired less if at all.

RE: 90 sized engine recommendation
 

My appoligies, if you are a beginner. A 120ax would be hard to handle if your not use to power management.

RE: 90 sized engine recommendation
 

Thank you Bob....Thanks guys.......
Tony

RE: 90 sized engine recommendation
 

Tony,

I have an OS 91 FX on my goldberg tiger 60 and I started out with a 14-8. That didn't give me the speed I wanted so I went to a 14-6. That gave me more speed but not unlimited vertical. I then stuck a 13-8 on it and I now have unlimited vertical and a plane that flies like a bat out of H???. My tiger weighs close to 9 lbs.

So, since your big stick 60 weighs about 6 1/2 lbs by the specs I seen, I would go with the 14-6 prop. Hope this helps.

big dan

RE: 90 sized engine recommendation
 

I beleive OS engines over rate the horse power listed in their specs more than super tigre engines do.

But IMO, the sound super tigre engines put out with those big bulky mufflers are somewhat annoying to my ears! Plus the mufflers have a tendency to fall off unless they are secured on very well. And you can almost guarantee the disc like baffle on the inside of the muffler will come loose and start rattling and when it does, it's a devil to get out.

big dan

RE: 90 sized engine recommendation
 

Thanks Dan,
14X6 it is. i will start with that. in fact i will go get one tomorrow.
Tony

RE: 90 sized engine recommendation
 

Thanks for everyone's replies. After much debate, I decided on the OS95AX. I just purchased it from Tower a few minutes ago. They're running a great deal with $60 off $300 or more. I also got a prop and a bunch of other misc tools (new engine mount, dead center hole locator, taps, tap handle, etc) that's been on my wish list and the total only came out to $269.00!

I thought about a 91 Surpass, but didn't want to spend the $300 plus on the engine alone. Can't wait to get the 95AX installed on the Stik 60.

RE: 90 sized engine recommendation
 

Sounds like a good match.

A LOT of excesss power, but not too much weight.

You'll want to put your battery packs as far BACK as possible, so make sure you get some extensions.

Also consider getting a large oversized battery.

I'm using a 4800mAh or so pack as far back as I can stuff it.

I can fly the plane all weekend long on one charge.... so the weight of the pack serves two postive functions.

Even with this extra weight, I'm usually the last one remaining, doing dead stick loops during fun flies, competing against other Stiks, thanks to the thick wings.

RE: 90 sized engine recommendation
 

Good to hear Denver!

That ought to make your stick really scream! And that's the only way to buy from tower using that $60 off on a $300 order! That means 20% off everything you buy! I just finally broke down and even got me a Futaba 6EX 2.4 after using 4 channel radios for the last 37 years! lol

Ya might as well spend all your money at tower before the stock market takes it all! :)

big dan

RE: 90 sized engine recommendation
 

opjose - thanks. With my old SK90 engine, i would have problems with a dead stick, similar to the person that posted the same issue with his Funtana 50. I cut and pasted your reply to my email for quick reference.

Basically, when i would go vertical, the engine would run fine. But when I throttled back from full to say mid throttle while the model was in vertical position, the engine would stall. I checked the tank and did a presure test and it was fine. But just in case, I ordered a new plug and stopper kit for the tank. I'll switch out all the fuel lines too.

RE: 90 sized engine recommendation
 

Bigdan: complete agree. The only reason i went for a $280 dollar OS engine was because of the $60 off discount at Tower. Plus I sold some other stuff on craigslist (old engine, my nexstar trainer, etc) to help offset the cost. I haven't made the jump to 2.4 yet. I'm still using my Hitec Focus 6 FM radio with the standard servos that I bought 10 years ago! And you know what? It still works great. I love the radio even though the only features on it are rate adjustments and servo reversing.

RE: 90 sized engine recommendation
 

I've never had any problems with my Futaba S3004 standard servos in my 60 size planes. Who knows, my Futaba 4 channel radios work so well, my Futaba 6EX 2.4 I just ordered might sit on the shelf for a while just like my Futaba 6EXP is doing at the present time!

I know one thing, my 4 channel basic radios will fly my planes just as well as any computer radio will.

big dan

RE: 90 sized engine recommendation
 

I don't worry about getting shot down because me and about 3 other folks are the only ones using 72mhz. EVERYONE has moved over to 2.4. I'll do it eventually, but would rather spend the money right now on reliable engines and part first.

RE: 90 sized engine recommendation
 

OK, Two SUPER TIGER 90's...:D

RE: 90 sized engine recommendation
 

Where do you fly? I have been to some of the flying fields around Colorado. Sounds like you will have plenty of power!

RE: 90 sized engine recommendation
 

I fly out of Cherry Creek State Park. The club is called Denver RC Eagles.

RE: 90 sized engine recommendation
 

Never been to it but I think I know where it is! Bob

RE: 90 sized engine recommendation
 

I have a Futaba Challenger that I bought in 1983 and I still prefer its feel to the T7 FASST that I bought the other year. I MUCH prefer the mechanical trims because of the speed and the tactile position feedback (You can tell where the trim is with your finger!).
There's a lot of 35MHz used at our club still, but there's a "triangle of doom" for 35MHz sets that 2.4GHz flies through without any problems (so far!). Maybe it's the top-secret radar test site just a mile away that's the problem. Who knows? It's a secret.

RE: 90 sized engine recommendation
 

Im going to go to the HS after work today if i don't have to work over to long. Im going to get ply to change my stik to a tail dragger. Will 1/8 ply work with blind nuts? our is this to thin?
Thanks,
Tony...ka9fax

RE: 90 sized engine recommendation
 

I use 1/4 inch hardwood with epoxy and nylon screws with
blind nuts. JMO

Bob

RE: 90 sized engine recommendation
 

1/8 ply will be too thin with the blind nuts. Go with 1/4 ply and you can use the same screws that came with the ARF to mount the landing gear. Just make sure to reinforce the ply because the balsa on the bottom of the fuselage is VERY thin. I used triangle stock and lots of epoxy.

RE: 90 sized engine recommendation
 

Thanks guys, everyone has been teaching me alot on RCU forums:D

RE: 90 sized engine recommendation
 

Couldn't agree more......low cost great motor. Reliable.

RE: 90 sized engine recommendation
 

Yes 1/8 ply is to thin, Go thicker or epoxy some 1/8 together! But 1/8 is not thick enough forsure to hold landing gear and do use blind nuts epoxy them in also making sure you do not get epoxy in the treads.

RE: 90 sized engine recommendation
 

The OS 95AX has arrived :)

RE: 90 sized engine recommendation
 

Ok will do, did not get to go to hobby shop yet worked over to late. Im going tomorrow after work. Im starting vacation.
thanks
Tony

RE: 90 sized engine recommendation
 

Are you sure you'll be able to handle all that power? That 95 will pull (2) 6 1/2 lb. Big Stick 60's!

lol