George,

Sorry, I missed your reply. Never got an email to notify me of a new message in this thread, and I don't check back here every day.

Anyway, thanks for the info on the 074 mufflers. Evidently those without rearward facing pipes were only used on pusher airplanes, because the 074 engines normally came with smaller versions of the 11 mufflers. I've just ordered some 074 mufflers from Steve Brown, but he may be out of them by now. He only found ten pairs, and I bought five pairs for myself and friends in my club who own those smaller engines.

Did you see my post in another thread about the 074 glow head problems we have found? They have not aged well like the 11 heads, probably due to a higher Zinc content in the castings, and that leads to deterioration of the element welds by galvanic action. A friend blew all four of his while running in one engine, and I blew the first one on mine within a couple of runs. The second head however is still going strong after more than a dozen runs.

A word of caution on the 074 heads. They burn out almost immediately if using a power panel, with the current set in the green zone!!!!

After being warned by my friend, I adjusted my power panel while looking at the element of a spare glow head. Turns out my power panel (Hobbico) produced a healthy glow just a hair above the 1 amp reading on the dial. My NiCad glow igniter works just fine, but I would not use dry or wet cells for the 074 glow heads.

Yes, the 074 is an easy starter with only an intake prime, but mine was rather finicky on a 5X3 prop. When I switch to a 6X3, if was a one flip starter most of the time.

I'm running both size Gilberts on 10% nitro, and 25% Castor for break-in, and they get stronger with every run. Should look really neat in a WWI style model, with upright engine.

Bill