I'm looking for recommendations (or confirmation) on a good first gas engine for this plane (Magic Hand 73" Yak, 10lbs w/o engine):

http://troybuiltmodels.com/newsite/a..._73.html#video

So far I've found and like RCGF engines, and am not sure if a 26 would be enough power, or if the 45 would be too big (I have a Venus II 'pattern' plane with a 120AX and LOVE the rediculous amounts of power it has). Here are the engines I've found. I don't know anything about gas engines so let me know what you think, honestly, and if you have any other suggestions. I'm pretty new at this but my club president flies gas and said he'd help me out.

http://www.zrcgf.com/store/Details.c...=27&category=0
http://www.zrcgf.com/store/Details.c...=28&category=0

Thanks!

The 26 should be enough.

Yep.

I bought the RCGF 26cc and am putting it in a 73 inch cap 232.Scratch built.All up weight should be 8-10 lbs.

The 26cc, I feel, would be fine for basic flying ...
But NOT good for 3d, If this is of interest to you...

Your plane is going to be 12.5 to 13lbs...
Most 26cc will do around 11lbs of thrust..(that I have tried)

The best lbs of thrust I have had is with a CRRC 26
with a 16x5 Zinger at 14 lbs...
I can hover a TWIST 150 with it.. SLOW pull out..

Walt...

A good 26, mejzlik 18x6, decent aftermarket in cowl exhaust, around 9000rpm will IMAC and 3D any 10lb aerobat just fine. I played with a similar setup in a Funtana X100, and QQ yak 73". The Yak was 11 lbs, and flew IMAC just fine with the 26 at that weight, but it wouldn't 3D like the X100 did at just under 10lbs. They won't fly like foamies setup like this, but they will perform well.

his plane is 10lb without engine though, so it will end up at 12-13lb minimum, for fully aerobatic it would probably be better to look into the 30-40cc range

EDIT: ok, so I should have clicked on the link, 10lb with a saito 180, so it'll probably end up around 11lb, a 26 would probably be sufficient

So would the 45 be too much? I don't want to spend $600 on a plane and engine for 'probably' enough.

The problem with these things are finding the best power to weight ratio to suit your flying style. A 45 cc will likely mount to the plane and send it straight to the moon in record time. The increase in wing loading may very well adversely effect flight performance.

Hi!
A 45cc engine is way way to much...weight!

i HAVE AN eXTREME FLIGHT YAK WITH AN xYZ 50 CC,REALLY MORE LIKE 46,ANYWAYS,LOVE IT ON MY PLANE THINKIM AT 12PDS 7 OUNXES WITH IT,LOTS OF POWER BUT I WANTED TO GO GAS ,26 WOULDNT HAVE BEEN ENOUGH,FOR 250 BUCKS I FEEL I GOT A GREAT BUY

Any recommendations, then, for a 30-35cc inexpensive/reliable gasser?

Thanks for all the input. I kind of felt that 26CC would be low on power and 45cc would be too heavy. 1lb difference.

Thank you.

My buddie has an RCGF 50 and it runs great. I personaly would stick to glow on the 25% unless you dont care about 3d type stuff at all. An OS 1.6 would fly the crap outa that thing. I originaly had a evolution 26gt2 on my wildhare 25% and it flew ok but was lacking pullout power. The tuned pipe would of helped get it to a more reasonable amount of power but I didnt want to mess with a pipe on a plane that wasnt made for one. I switched to the OS and it flew the crap out of it. The 25% is a tough size to go gas with great results. The biggest problem is the 26cc are just a bit to weak but the 35cc are usualy as heavy as a 45cc so there is no great fit engine esp now that the 26ssr is gone. Someone needs to make a 30cc that weighs as much as the 26cc but makes 18-20lbs of thrust. I wasted a good amount of money trying to get a decent 25% gasser and personaly came to the conclusion that if I want gas on my aerobats it has to be 50cc or bigger.

Makes sense. I've been doing quite a bit of research on this and pretty much came up with the same answer. I can't fit a bigger plane but don't really want to the fuel consumption of a 1.60 glow. The research continues...

You said you already have a 1.2, why not slap that on the front and give it a try. Alot of people are flying the 25% wildhares on os 1.2, its just not gonna be crazy ballistic like the 1.6 is. I dont know how much more fuel the 1.6 uses over the 1.2 but I doubt its that big of a difference when it comes down to it. GL with what ever you decide!

Yeah, have to think about it. Believe it or not, 10% nitro fuel here is $35/gallon, so any difference is noticeable.

You're right, I thought I read it was 10lbs without engine. Maybe a strong and light 26 would do the trick...

I'm not a 3D pilot, and don't really intend to be, but it would be nice to have the option to try.

I'll get the plane, still thinking about engine...

I asked the same question for an extreme flight 74" yak, i just copied and pasted a reply i got from "aeroparts". He's son flies the 74" yak with a mvvs 26 with a tuned pipe. I think it's the same engine as an evolution except one is red and the other one is blue, not a 100% sore on that one but i think i read it somewhere before. He also included a video.


Hi. The pipe gives you more power and we have not any problems with the throttle response
that some pipe setup has. You can get more power from those engines but as it is now it has been the quietest engine except from electrics at the competition (IMAC reading 83dB) and has been total reliable. With right cooling, oil etc.
As you can see my son Carl has used it in a lot of competitions. The EF 74” YAK is a good plane to put it in, its not the lightest plane, but its very strong, there is lighter planes in this size but in our case it must be strong enough to keep up with the abuse from very hard flying and the plane and engine has done this . Our plane weights 6.1kg with fuel, the pipe mod adds a little weight because the pipe is heavy but it climbs out from hover quite nicely OK it not ballistic. We haven’t really compared because we haven’t seen any other 26cc at the competitions only 50cc-160cc and they have been beaten in Sportsman and Freestyle. Maybe the pilot has something to do with it also.
But OK, you can put a 40-46cc engine in a 74” plane. The only thing I can think of is that the engine should be very cheep or that they are so low powered that it’s needed. But with the same setup that we have you get a nice combo with enough power and it’s very quiet. But it’s your choice.
Maybe some of the videos can give you the feel of performance.
and I found anotherone to.
Carl fooling around
http://www.junkshop.nu/flyg/Arvika20...demo_small.wmv
http://www.junkshop.nu/flyg/Arvika20...n_demo_big.wmv

//Lennart
SWEDEN
(Sorry about some spelling)

35$ for 10% nitro *** is that all about? Is the lhs just a rip off or is there a reason why its so much where you live? I dont blaim you for wanting to go gas at those prices. 15% is right around 20$ at my lhs, i think i can get 30% heli for cheaper then 35$. The Evolutions 26gx or MVVS 1.6 with a pipe should get it done for you just isnt gonna be a cheap setup. Since your not so into 3d the zenoah G26 might be a good option too. I think it makes about the same power on normal exhaust as the evolution does on a pipe but not positive. When I was looking for engines weight was a major factor for me since I wanted to learn 3d with the plane so I was only looking at the lightest options.

There are several LHS's here that sell fuel for over $30. I drove 6 hours to Maine - more in the middle of nowhere than here, and the LHS owner apologized for the increase in price - he went from $15 to $16. I said 'I'll take 2'.

My understanding was that Zenoah engines are very heavy and Evolution lacks user-friendliness/quality. Am I mistaken?

My bad I didnt realise the zenoahs were still that heavy. The evolutions are good engines though, they are just rebadged MVVS and are one of the higher quality gas rc engines. The only problems with evolutions is price and they are made to run on a pipe so if you dont use one your giving up a good amount of power. The user friendly stuff prolly has to do with some of the advanced features the ignition has. These features are optional though and if you dont feel like messing with them dont. I didnt use any of the auto start crap on my evolution 58 and it starts and runs great setup like a normal engine.

If you go gas you are gonna have to sacrifice something in this size, either weight or power. The lightweight 26's are kinda low on power for 10pound plane and the ones that are making enough power for 10pounds wiegh a bit more then there equal powered glow counterparts, but remember you wont need to carry as much fuel so the weight will get offset some. There is a vid in the wildhare forums of a 25% with a 3w 28 on it AND a smoke system that weighs 12 pounds and still flys great and has tons of power. The 3w28 might be a good option for you as well although its not exactly cheap either. If I was you I would go with the slightly heaver engine that makes good power over a lighter one that will leave you wanting more power. I almost went with the 3w28 for my wildhare but didnt because of weight. I think looking back now if I would of I would still be running that engine and would of never went back to glow for it[:@]

GL!