Originally posted by Ed_Moorman
1. Mounted engine at 10 o'clock & cowled with balsa.
Ed, what's the significance of that hour? Is it some kind of seance to appease the RC Gods?
Sorry, just couldn't resist.
Mounting the engine sideways is no big deal, though it would be much easier done with an aftermarket engine mount thhat has symmetrical mounting holes. With the supplied Sig split mounts, you have to decide either upright or sideways before you start and you'd be stock in that position as you more than likely won't be able to rotate the mounts 90 degs without having to drill new holes.
In any case, be sure to position the tank so that the centerline is level with or a little above the carb. Don't worry too much about placing the supplied "tank floor" ply piece on the "shelf". It's best to adjust it's mounting position to accomodate the ideal tank height.
Building a balsa cowling in fairly simple as well. The best suggestion I've heard in to download the GP Sportster or Ultra Sport manual and follow their instructions.
I usually like to build removable cowls, however, and it's a bit more work. I usually fiberglass the removable cowl to make it stronger while keeping the weight down.
BTW, I've heard that the Sig Miniplane cowl fits the 4*60 well. Don't know first hand though.