Lightest engine to hover 5.5lbs?
 

I have a Balsacraft Extreme 3D (kit) fitted with a SC .53 two stroke. It weighs almost 5.5 pounds.

It doesnt have the power to hover :-(

I have a Thunder Tiger .61 Pro I could fit but it'll make it very nose heavy and will involve lots of modification.

So my question is, what engine in the same weight / size range as the SC 53 will provide enough power to hover and 3D? I don't mind strokers if it gets the job done.

I've read here about the YS .63 and the OS 50 SX. Will either of those cut it?

Here's a pic of it, not very good cos it's crunched for the web:

Extreme 3D engine
 

The engine you are using should hover the plane with the correct prop (large diameter and low pitch) if the engine is performing correctly. This is a relatively large airframe. I'm putting one together and have an Irvine 60 in place. This is the older design and is not a lot larger than the 0.53 you are currently using. The TT pro is a much heavier engine. You might seek out an Irvine since they are made on your side of the pond. I think the YS 63 would be marginal in this size plane and the 91 YS way too heavy.

EXCAP232

Lightest engine to hover 5.5lbs?
 

Hi,
I've seen an extreme 3D been Torque roled on the deck with an Irvine .53 fitted, normal exhaust...can't remember the prop size but it ws due to be changed for one of the funfly types. It could also pull out of the hover (which always helps!!).

Happy Flying

Lightest engine to hover 5.5lbs?
 

My advise would be to get a 91FX in it.

Honestly, we fly them now with 91's (laser 3D's as well) in with a 14x7 APC prop. It over revs with that prop but you'll never reach full throttle in flight. It gives you plently of power and it also gives you the instant get up and go when your in trouble.

By the way. Rubber mount it, ultra quiet and it doesn't shake your plane to bits.

Ground clearance
 

Great choice of engine since it is in the same case as the 60. Might be a problem with clearance with the supplied gear. I will have problems with the prop from the 60. Have you tried the 14-4W prop?

EXCAP232

Lightest engine to hover 5.5lbs?
 

For 2C, I'd go with an Irvine 53, MVVS 49, or Webra 50. For about the same weight you could also get a Saito 91 4C which would definitely hover your model...

Enjoy!

Lightest engine to hover 5.5lbs?
 

Saito 72, 16.6oz

Lightest engine to hover 5.5lbs?
 

Wowbagger,

May be you should change the air frame for something lighter. There is nothing wrong with the design, just the kit airframe is over engineered. I have run the Irvine 53 on with mini pipe and 12 1/4 x 3 3/4 apc on a Weston UK Jazz to very good effect. The plane was about 4 3/4 lbs. I have seen the 53 on an extream kit and it is very marginal, even with the 12 1/4 x 3 3/4 prop. With this prop the motor should be working on it power band. Also what pipe are you using? The motor does work better with a mini pipe and low load letting the motor race. The motor may be a little peaky though, problem with any 2C doing funfly. The extream RTF should come out under 5 lbs and 53 should be ok with that. I have seen a an rtf extream work very well with a thunder tiger 45!

I am currently running 3 x YS 63. The motor with the pipe comes out at the same weight ans the OS 46FX with pipe. The YS power peaks at 11500 and about 1.5 bhp. So with the correct prop, the motor is working rite oin the power band. The heaviest of plane I run is a Kyosho Cap 232 40. It come out at 5.5 lbs. On a 13 x 6 apc it will prophang, but the punch out is very marginal. I have not tried the 13 x 4 W or 14 x 4 W on it yet. The other planes are Seduction FS at 4.5lbs and Madness same weight. With the correct prop the punch out and acceleration is awesome

any way good luck

Kris

Lightest engine to hover 5.5lbs?
 

The YS will give around 10 pounds of vava voom with the right prop.

Lightest engine to hover 5.5lbs?
 

Thanks for all the info guys. It sure is a problem. I flew it last summer on a 12 x 5 but she wouldn't hold a hang and would slide back after a few seconds. The engine was very new and maybe not developing as much hp as it could. Later it had a lot of endplay in the crank so I took it back to the shop. They returned it to the importer who fitted it with a new piston and liner (Duh?!!) so I have to run it in all over again! There's a baffle in the silencer which looks really restrictive so maybe the minipipe suggestion would help it out.

The Ripmax display team use the MDS .58 and hover okay but how they get them to run like they do I don't know. Must be 25% nitro or something. I have one of these engines but it's a dog and I'd never trust it with anything that can prop hang!

I reckon I'll give the motor another chance and run it in (again!) and use a 12 or 13 x 3 3/4 or 4 and maybe try a minipipe. I'm sure that mickey mouse baffle is responsible for lots of lost power. If you take it out it's too noisy and the carburation goes weird.

If that doesn't fix it I'll try the Siato .72 or .91 which sounds good cos I'll only have to change the mount as the weight is roughly the same. And if that doesn't work I'll saw an inch or two off the nose and give it a OS 91. (which I wish I'd done in the first place!)

Can anyone recommend a minipipe?

Lightest engine to hover 5.5lbs?
 

Really, try a YS 63, more power than a Saito 72. Try a 13x4 on the SC.

Lightest engine to hover 5.5lbs?
 

Ah, Robert, I missed your post while I was writing mine.

You can't be serious! 10 pounds of thrust with a YS 63???

Oh, and Kris1, meant to say I fly a Limbo Dancer (kit) that weighs 4 pounds (plenty of repairs!) with a Thunder Tiger 46 Pro which has gobs of power and hangs easily, which is why I thought a .53 would lift 5+ pounds. Doh! Wrong again Sherlock! :-)

Lightest engine to hover 5.5lbs?
 

Dagnabit! Missed that one too!

Lightest engine to hover 5.5lbs?
 

Hahahaahaahaha

Lightest engine to hover 5.5lbs?
 

Wowbagger

Interesting how opinions differ! FWIW I'm a big fan of keeping models like the Extreme 3D light. Therefore I reckon if you're gonna go for a stroker then it has to be the YS 63 and if you're gonna go for a 2 stroke then either an Irvine 53 or OS50SX. I haven't had any personal experience of the YS but several in my club rave about them. The Irvine is great value for money and will swing a big, wide prop whilst I gather the OS likes to rev a bit more but will still cope well with something like the Extreme. I wouldn't recommend a TT61 it'll be too heavy!! Hope this helps, happy flying :)

Andy

Lightest engine to hover 5.5lbs?
 

Wowbagger,

The YS 63 will swing the same size props at similar RPM than the Satio 91!!, (its all in the super charging). If you are talking of spending that kind of money, then go for the YS. But I still think that your airframe is too heavy though. If you can drop 1/2 to 1 lbs of it, the motor setup you have with the 12 1/4 x 3 3/4 WILL be fine. The extream lite with your running gear should be fine and will cost less than a new engine!... One thing to note though, I have found all my funfly aeroplanes with a 2 stroke to be noisy. I found that the motor is amplified, by the wing, to what is in effect a big drum. This is one of the resoans for going 4 stroke.

As for the Ripmax display team, my understanding is the put irvine carbs on them.

Cheers

Kris

Lightest engine to hover 5.5lbs?
 

A Webra 50 will handle it and is probably the lightest that will. Add an ultrathrust muffler to it and it'll really handle it. Do the same thing to the OS50 and it'll come alive too. I don't know if there is an ultrathrust for Irvine 53.

My Pizazz is 5.5 lbs and I've flown it with both the Saito 72 and YS63 on 15% and 30% nitro. It will hover with either engine on 15% and have just enough power to jerk it straight when things get a little crooked or pull it straight up out of the hover. But just enough. 30% nitro helps a lot but I would say (IMHO) that 5.5 lbs is the upper limit for both of these engines and still have good authority in the hover.

Lightest engine to hover 5.5lbs?
 

Hercmate - Yep, I reckon you're right. Keep it light. I wish now I'd cut lightening holes in everything when I built it. I did toy with the idea but mistakenly thought "they" must know what they're doing!

Kris1 is right, for what I'd spend on a YS I could buy a ready built Xtreme Lite and use my SC 53 in it!

I'm tempted to try the MDS .58 with an Irvine carb' because the Ripmax team DID prop hang them on this motor, and they were kit built jobs too. That MDS is one powerful motor but with hopeless carburation. So maybe that's the answer.

It's all becoming very confusing :-))

Lightest engine to hover 5.5lbs?
 

djlyon, never heard of ultrathrust mufflers before. Is it an American product. Where can I find out about them?

I have a friend who has an unrun Webre 50, hmmmm :-)

Lightest engine to hover 5.5lbs?
 

Wowbagger,

I've had an idea. Assuming you're happy with a 2 stroke then sell your SC53 4 stroke and buy an ASP 53 2 stroke. See http://www.justengines.unseen.org/ASP52S.htm for details cheaper than an Irvine 53 and slightly up on RPMs. And if you get a mini-pipe for it it'll really go.

Andy

Lightest engine to hover 5.5lbs?
 

Errrmmmmm, sorry Hercmate, it is a .53 two stroke! :-)))

Anyhoooow, recommend a pipe for it 'cos I know nothing about pipes. It'll need a pretty broad powerband though for hanging dyareckon?

Lightest engine to hover 5.5lbs?
 

Look at the throttle pipes at www.westonuk.co.ukl

Lightest engine to hover 5.5lbs?
 

Thanks Robert,

£45 for a throttle pipe.

Any recommendations for prop sizes when using a pipe?

Lightest engine to hover 5.5lbs?
 

Try the 13x4 first without the pipe, to see if you like it. If not, I have absolutely no idea, maybe a 14x4, 14x4W. Something like that. Tell me how the pipe goes by the way.
Robert.

Lightest engine to hover 5.5lbs?
 

As soon as our flying field is less than knee deep in mud I'll fly it and try it. I'll let you know what developes.

Thanks for the help and advice all. ;)