Ol fart

I've decided to build a BUSA 1/4 scale sopwith pup. Most people run a 23cc or bigger 2 stroke but I'd like a four stroke gas engine. The new Saito FG-19R3 is 19cc. Will this be enough power? a 15-6 is the largest prop recommended by Saito.

BobH

My Feedback: (2)

Lots of drag on a Pup. That engine has less power than an OS 120fs. I would not use it..

Greg Wright

My Feedback: (6)

I'd recommend that you get the 33cc 3 cylinder and then just manage you power settings with the left stick.

Ol fart

The 33 was my second choice, but it may be too heavy.

Greg Wright

My Feedback: (6)

You will probably need the extra weight to balance.

Ol fart

I'm going to find out the weight diffence between the 33 and a 23 two stroke.
OK the 33 is 50.8 oz
a 26 two stroke is 53.6oz, a 23 is 51oz.
This could be a good fit.

jefflangton

My Feedback: (23)

I wouldnt way overpower it and have to add tail weight. You will somewhat compromise that planes great flight characteristics.

jefflangton

My Feedback: (23)

Ok. I read the numbers above, with my glasses this time! That 33 will be fine

Greg Wright

My Feedback: (6)

Even with this motor i bet it will still need some nose weight. This won't be way over powered either.

Like i said above if you use the left stick to control your speed you will be just fine.

Ol fart

I found another spec sheet that said it ( the 33) weighs 57.5oz

SunDevilPilot

1/4 BUSA Pup. DLE 30.

Photo speaks for itself.

Ol fart

Ya, I don't think you can add too heavy of a motor to these pup's. I read a post from a guy who used a 26 2 stoke and he had to add FOUR lbs to the front. He obviously built it tail heavy, but it came in at 20lbs !!