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u/SnooGiraffes560

▲ 2 r/Outboards

Engine loosing power

Hey guys, I have recently got my hands on this beautiful 2 cylinder Chrysler 45 from 1975 that has been sitting for at least 10 years, if not more. I cleaned the carb, changed the spark plugs and it starts and runs like a charm.

The problem is that while on land the engine is able to reach max rpm, but in water it struggles. The boat reaches no more than 5-10 kmh and there is no difference in engine rpm whether it is half throttle or full throttle. So in water in gear the engine feels like it can reach only half of the rpm possible.

Do you know what could be the problem and where to dig? Thanks

u/SnooGiraffes560 — 4 days ago
▲ 1 r/RCPlanes

Hi guys, I’m new to RC planes and I want to build one that can fly very slowly — around 30 km/h. I’m comfortable with soldering, building frames, and DIY stuff, but I don’t really understand the flight characteristics and limitations yet.
My idea is to build a light plane with about a 140 cm wingspan. Is that enough for stable slow flight? How do planes like that usually behave in the air?
Are there any tricks in building the plane that help a plane stay stable at very low speed?

Should I better use a monoplane or biplane scheme for that? Is bigger single motor better than 2 smaller motors?

The reason I want such a slow plane is because I live on a farm and my dog loves chasing birds. I think she would love chasing a slow RC plane around an open field.
Right now I was thinking to build a model of the Tu-4 bomber, because it has huge wings that are designed to create a ton of lift for the payload. But I’m totally open to changing everything if that’s a bad idea for a first slow-flyer project.
Any advice, examples, or things I should avoid would be greatly appreciated. Thanks!

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u/SnooGiraffes560 — 20 days ago