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Ripmax Harmony Twin

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Phil 914/04/2012 06:07:00
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4284 forum posts
229 photos

Does anyone know if you can still buy these anywhere?

are there any other IC twins anybodt can recomend?

Paul Marsh14/04/2012 06:19:28
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3710 forum posts
1053 photos

I still haven't flown mine. Had it for a few years...sad

I've got and flown the Seagull Dual Ace, which is still available, but there is a new version, not the Dual ace, but nice.

Phil 914/04/2012 06:44:01
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4284 forum posts
229 photos

yea there does not seem a great choice right now for twins unless you want to spend big

(even a low cost airframe twin will already cost to fit out)

weasel14/04/2012 07:33:58
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381 forum posts
6 photos

Hello Phil,
Try Steve Webb Models they are showing one on there site for £140
I have the Harmony twin and it flys lovely, fitted with SC 40 engines and they are more than powerfull for the plane. fitted out with 8 standard 3003 Futaba servos.they also work the retracts. So the price is not to bad to get the plane in the air.
This is one great easy twin to fly...teeth 2

Weasel........

Phil 914/04/2012 07:57:03
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4284 forum posts
229 photos

Cheers weasel

I did see it on SWM it is listed but just says contact for deatails (I sent an email)

I would like to fit four stroke motors if I can find one

Phil 914/04/2012 09:16:11
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4284 forum posts
229 photos

none left at SWM crying

DH 82A14/04/2012 11:59:38
198 forum posts

Galaxy Scorpion Twin 2x 25s ? Mine flies OK with electric motors.

simon burch14/04/2012 16:48:33
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754 forum posts
19 photos
Out of the two, I prefer my Dual Ace. The retracts were pain on mine, and the wood around the nose mount was awful on mine and needed doubling up with some proper plywood. Also, the one piece wing on the harmony was awkward to handle and get in the car, where the Dual Ace wing in in two pieces.
I think the Harmony flew on rails, but to be honest the Dual Ace is pretty good as well.

If you are not fussed about retracts, i personally would go for the Dual Ace.
Paul Marsh14/04/2012 16:56:02
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3710 forum posts
1053 photos

That's why I've not flown mine. About to fly it, and the nose leg steering tiller broke. Not done anything with it, yet.

Phil 914/04/2012 18:47:19
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4284 forum posts
229 photos

the one pice wing does sound awkward

Steveflys14/04/2012 18:56:10
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103 forum posts
4 photos

I've had both planes mentioned here ie: Dual Ace and Harmony twin. The Dual Ace is a far better built and finished plane, the Harmony flew like on rails, very aerobatic, sadly lost when one engine cut. The engine mounts on the Harmony needed beefing up as they flexed badly being made of poor wood, I would be very concerned about fitting 4 strokes in this model due to vibrations. Also the retracts were a pain, the pin which the retract swivels on is not secured and over time works it's way out, beware.

The Dual Ace is not what you'd call aerobatic but flies beautifully, always admired at the patch and sounds awesome with a pair of 46 LA's perfectly harmonised. Shame there's no retracts but at least there's one thing less to go wrong.

Steve

Djay15/04/2012 10:15:45
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543 forum posts
445 photos

My Harmony is over 4 years old, fitted with 2 ASP 52 FS engines.

Never had any problem with the retracts, tough and reliable.

Engine mounts finally started coming loose end of last year due to old age of the glue joints, and the fact we fly in up to 50c heat and very high humidity. Just epoxied all the joints back together and she is fine.

Had a few engine outs, and I have found it is easier to fly into the dead engine on this model , but reduce power as you do so, then open up the power, and land as normal. if i turn away from the dead engine it stalls badly.

Hopefully many more years left in it,

Darryl

Phil 915/04/2012 11:44:27
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4284 forum posts
229 photos

I had an idea I have a great planes escapade 61 and its a great flying model.

I wonder if I could buy the 40 size version and convert it to a twin? I guessing this would fly great.

I would need to build the engine nacelles and a new nose cone and probably have to strengthen the wings to take the extra weight of the engines

How do you work out engine sizes for a twin.

Phil 915/04/2012 11:44:36
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4284 forum posts
229 photos

double post

Edited By Phil B on 15/04/2012 11:45:04

cymaz15/04/2012 13:52:51
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8670 forum posts
1177 photos

Go for the dual ace. liked it so much I bought another after a mid air. I made several sucessful mods which I will gladly share with anyone.

Phil 915/04/2012 14:51:15
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4284 forum posts
229 photos

cymaz

what mods did you do?

simon burch15/04/2012 15:23:00
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754 forum posts
19 photos
The only mods I did to my Dual Ace were to double up the front bulkhead as it's not really secured that well and it doesn't take much to rip it out. Plus putting the c of g in the right place, but I think later kits have this corrected in the instructions.

I have a Galaxy Scorpion twin kit I've yet to build (must have had that 10 years) and an Extra Slim Twin.

Cheers,
Simon
cymaz15/04/2012 15:47:35
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8670 forum posts
1177 photos

Twin leg nose wheel from here. Closed loop rudder (really good mod as the original rudder wire bends too easily).

Replaced the stupid plastic thumb bolts with metal bolts that I can put a proper socket wrench onto (useful on a cold day when you cannot feel your fingers).

Cut some cooling slots on the top of the cowls and made up up grills to smarten up the holes.

With my FF9 Tx used an FrSky 2.4Rx and now run each engine idle independently (this took 3 mixes on the Tx and 2 hours to figure out, but it is really useful, better than having to fiddle about with the cable. The mixes are in my photos under Dual Ace).

Hope this helps

Steveflys15/04/2012 16:04:38
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103 forum posts
4 photos

cymaz, which size twin leg nose wheel did you use, looked at the website and they look like a good idea.

Steve

cymaz15/04/2012 16:18:24
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8670 forum posts
1177 photos

Standard RF450- 4 1/2" from axle to top of spring. Needed a spacer on the ply mount but nothing major. I bought it from Tower Hobbies because I couldn't find them here in the Uk. I don't think T.H. do them any more.

If buying from the U.S. I will use only PayPal or credit card.

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