I have seen many people flying with YS140's and quite a few others on a variety of 2 strokes. Having has a YS120ac for a short while (Why o why did I ever sell it??? DOH!!! Oh I remember I didn't have shares in Coolpower!!)) I can realise that it costs around £4 to £5 per flight in fuel alone. For the new pilot wanting the right tool for the job this seems a bit excessive...hence looking at a larger two stroke like the Moki 135 running on straight....imediately cutting the cost of fuel in half and gaining reliability as the YS's that I have seen require regular yearly maintenance where as a two stroke can be rebuilt by a mere mortal like myself! I can realy appreciate that a 4 stroke is better for slowing the plane on down lines but have just recently discovered if you use a big wide blade prop this slows the two stroke down nearly as well.

So my logic is telling me a modern shape pattern plane i.e. draggy and slow with a big 2 stroke and a wide blade prop should come very close indeed????

What do you guys think??

There is a thread on this site about the Moki 1.35 used in a pattern ship. I think they said a 16 X 10 or maybe 16 x 11 worked great on 5% nitro. They ended the thread saying "why spend $600 on an engine?"

I have a Moki 1.35 on a 1/4 Edge that cranks an 18 x 8 prop on 5%. I had to go to 18 X 8 to keep it from whining like a 40 sized motor at high rpm. The engine is ultra reliable and so powerful that I probably only use 8 oz of fuel a flight (running at partial throttle). With the 18 x 8, the plane slows down so much that I now land with a little power.

Sounds ok, but why not go with the OS 160? Don't know the price of the 135, but from what I have seen of their other engines, seemed a bit expensy. 160 definitely will pull ur plane around, with lots to spare.

Lems

What was the thread can you remember?

Reason for Moki half the price of the OS!!!

Rich

Try Singahobby, the OS 160 translates to a cheaper price than the Moki, atleast here anyway.

OS 160 on a Cline fuel regulator should fit the bill nicely
Try a search for old threads on the 160 with a Cline , there have been quite a few.