Aeroworks QB 150cc YAK 55M

[Naughty Monkey]

I have been putting dowels through the firewall too. I have been surprised at how much even the aircraft ply will compress.

[Joe Hunt]

[Joe Hunt]

Somehow I forgot to show the engine mounted.

I used 5" bolts, although 4-3/4 would be perfect, and 4-1/2 could have worked in a pinch. I had 4 and 4-1/4, but neither were long enough to attach a nut on the other side of the blindnut.

The Walbro carb has a short throttle arm with bad geometry to get any kind of proportionally linear transition of the engine. Here's some pics of a similar carb in a previous review I did where I show what I did and why:

I didn't have any more of those nifty old Nelson arms lying around so I used the included 3W arm. I soldered and bolted it down:

[Naughty Monkey]

[Naughty Monkey]

I am still amazed how people laugh at being so anal about set up on a plane, then they fly it and can't believe how good they fly!

[Joe Hunt]

[Naughty Monkey]

Yeah, I am definitely challenged enough as it is.

[Joe Hunt]

I cut in the throttle servo pocket, glued in some hard points for the servo screws, drilled 'em, put thin CA in them, and then bolted down the throttle servo. I used the stock throttle servo arm (4-40 piano wire), so I used a carbon fiber sleeve over it. I put some epoxy inside of each end to keep it from moving. Normally I'd just use a 6" titanium turnbuckle, but I didn't have one laying around. I used a stock plastic 3/4" long servo arm from Hitec. I ended up with the sub trim at 0 and end points at 130/130. That should give me the kind of resolution I like. And in combination with the butterfly/throttle linkage being correct... I should really have a nice throttle response.

Also, you can see that I covered the sides and bottom of the motorbox and painted the engine spacer grey. Not seen is that I soldered on a PAD and an extension to the Hitec brushless 9465 servo that I used for the throttle, it has a .07 speed.

[Naughty Monkey]

Nicely done

[cherrybomb48]

Looks sweet!