OS FT 120 II run and thrust test

Watch (and listen to) my OS FT120 engine running with its new exhaust system: The old big custom made silencer is now replaced by two seperate standard single-cylinder-mufflers to gain more power for better aerotowing.
Especially watch seconds 30-35; you see the tubes blowing out smoke reciprocally when accelerating the engine!
From ~6700 RPM with the old one it runs amazing 8200 RPM now with an 18x6" G-SONIC prop! In flight I feel this difference very well and at the rubber band test stand there is also ~1,5cm more elongation. Although I don't know exactly the thrust force (I think its ~5kp) my stand is still useful to compare different props.
The only disadvantage is that the plane now isn't the most silent one in our club any more. :(

Category:

Autos & Vehicles

Tags:

• rc
• plane
• christen
• husky
• OS
• FT
• 120
• engine
• muffler
• silencer
• thrust

[echelecopao]

it's not a good idea to stand in front and so close to a spinning propeller

[aviatorsbh]

@echelecopao I trust my fixing installation.

[aviatorsbh]

Its a good one! Try it out!