sidav

hi, im going to put a gas engine in my 8lb yak would a 26cc be an over kill or would i need a 20cc,the recomended glow motor is a os 120ax 2stroke,what do you guys think.

w8ye

My Feedback: (16)

Use the 26cc

rcairflr

My Feedback: (44)

There is no such thing as overkill, only overweight...

Zippi

My Feedback: (10)

sidav,

Which YAK is it? Using a G26 on an 8 lb plane is way to much engine. Why add all that weight when it's not necessary. A much small engine like the OS 95AX-120AX will give it unlimited vertical without all the added wing loading.

Tired Old Man

My Feedback: (1)

Use the 26. Just obtain the right one.

Peter Burgess

Evolution/MVVS 26. Great engine and for a gas newbie, it even looks like a glow engine

pe reivers

Jus don't treat it like one. Gas engines have very little internal cooling, so you must provide a well designed amount of cooling air flow through the engine fins. Engines like to be warm. They hate it when they get hot.

sidav

thanks for your replys its a grupner yak 54, iv had a 120 ax for it but sold it, im looking to go to bigger planes with gas engines so i thourght this would be a good place to start, i just orderd a 26cc thanks

rmh

For a super gas setup -the MVVS26/Evolution engine is in my book the best of the bunch.
light easy to mount - I have done a number of models using these on pipes and on Pitts style muffler

jooNorway

Sure?




I have tried MVVS for the first time this summer; put a 35ccm in my Graupner Taxi2400. It is set up to work as a TUG for our smaller sailplanes, 4,5 meter and smaller. During finishing I got some doubts, maybe I should have used a DA50 instead...? But I have one word to say; wooouh! Using tuned-pipe the MVVS take the Taxi vertical, and this is a 2,4 meter bird. My guesstimate is this 35ccm is as strong as my DA50 with cannister which power my C-ARF Extra!
More of my planes will get MVVS Have another new 35ccm with pipe which will go into a 2-meter Extra this winter. I am putting together a new simple TUG for the big sailplanes, and this one already have a DLE111. But when that TUG is done I plan to build a nice scale TUG, propably a Wilga. And I already know that project will get a MVVS. Depending on which scale I go for a 116 or a 152IRS will be the obvious choice.
Some friends of mine who compete in IMAC and never have concidered anything but 3W now have bought MVVS58`s for their new small IMAC trainers, because they got impressed by my Taxi. One of them have flown it, and he say there is a chance there will be no more 3W`s in the future for him

dobra

I have just put an evo 26gx in a yak 54 90 size its the newish yellow seagul one think about 73inch wing. It should have a flying weight of between 8.5 to 9Lbs. mine is 10.5lbs and flys good. It would obviously fly better at its correct weight but wanted to try petrol and got the yak at a price I could not refuse. It does specify the zen 20cc petrol but weight wise I could not see much in it and the evo has fitted good in the cowl.
It does all depend on what you want out of your plane and how you fly it. Hope this helps in your decision making.

NM2K

My Feedback: (14)

The OS 1.20AX two-stroke will clean the clocks of virtually all 26cc and smaller gas engines that aren't running a tuned pipe. There is no parity in power between glow and gas versions of the same displacement. That is not possible, nor does it happen in the rear world. Close? Perhaps. But not parity.


Ed Cregger

captinjohn

Not all Ed....Capt,n said that!!!!!!

alburman

My Feedback: (4)

Any time you ask a question on RCU, you will get several replies based on individual personal experience. Some good, some not so good. It's true that equal displacement engines, glow and gas, the glow will always have more power. That being said, the gas engine will run about two to three times longer on the same amount of fuel and comparing the price of glow fuel to gas you can easily triple that. Just go for it with whatever engine you have. Once you try gas you will probably want more engines anyway and you can always upgrade. Good Luck!
Al Burman

WILDBIL

My Feedback: (2)

hi i am putting a weedeater motor on my ultra stick 120 i am useing the tank that came with plane can some one tell me how to hook up fuel lines there is two lines into carb when i pump fuel into tank it comes back out the fill tube

rangerfredbob

My Feedback: (13)

if the carb has a primer bulb, the fuel line near that goes to the tank as a return, you can tee into that line as a fill line without hurting anything, if it's just two nipples then you can plug one of them, one is supply and the other is a purge line if the weedie had an external primer bulb, it would suck fuel through the carb and return it to the tank. you need 3 lines with a primer circuit, the clunk line that goes straight to the fuel supply of the carb, one vent line that goes over the top of the tank then out the front of the plane at the bottom of the fuse and the primer return line that you can tee into for fueling.

sidav

hi guys, i bourght a rcgf 26cc for my yak. the weight issue isent a problem i needed 60g to balance the engine is very good for the money and it flys great , this was my first gas engine it wont be my last im hooked. thanks for all your info.

RACJ

Is the RCGF26 on the Seagull Yak? What prop is working for you on this combo. THANKS,RACJ

sidav

its the graupner yak 54 90 size iv got a 16*8 at the mo but it will proberly want a bigger one when its run in 18*8?

Tired Old Man

My Feedback: (1)

I think if people ever break the traditional molds and start doing some exploring, they'll find the MVVS line of engines to be the best designed "type specific" engines for our models on the planet. Nothing else currently available compares. Some of their features may not be desirable to some, but the engines themselves are works of engineering art.

rcplumberpilot

crrc 26 is a good one to use or zenoah g 26i

412t1

My Feedback: (7)

Is there a North American distributor of MVVS engines? I know Morris Hobbies used to carry them but not anymore.