Gator RC AirBoat Forum

hmcnett · Posted: Sun Aug 02, 2009 8:23 am Post subject: Zenoah G270 Airboat engine

Shawn Oneill of Oneill Brothers Racing has been working the numbers, with building a engine just for the airboats. Shawn and I have been in communication for a while discussing just what is needed from a engine on the airboats. There are many modified marine engines that push out over 6HP, but these engines get their power at high rpm's (16,500+ rpm's).The engines are built for top end HP and high rpm's. We are turning 14" and larger props, which needs bottom torque to turn.
This new airboat engine is a modified Zenoah G270. Dyno tested 5.5hp @ 10,000rpm's. Lots of bottom end hp for pulling the boat out of the turns. I will post information as the testing is compelete. Its looking like this will be a very good race airboat engine.

hmcnett · Posted: Thu Aug 27, 2009 2:41 pm Post subject:

Almost finished with the new designed hull for this engine, the Cajun Gator AirSled. Have some breaking in on the engine to do. Started with the MAS 14 x 7 3-blade, change it to the APC 14x6 2-blade. I'm thinking this engine will have too much torque for the MAS. Hoping by next week end I will be running the new boat. I'm needing to know if the engine and if the hull is going to work for what I'm wanting.

hmcnett · Posted: Fri Sep 04, 2009 8:55 am Post subject:

http://www.youtube.com/watch?v=ix7frbM-eOo
[youtube]http://www.youtube.com/watch?v=ix7frbM-eOo[/youtube]

hmcnett · Posted: Sat Sep 05, 2009 8:10 am Post subject:

The engine still has some break in time left and a little fine tuning of the carb in this video. Top end is a little faster but the main difference is in the power that it has to pull out of turns and take offs. At 1:30 in the vid I planted the boat in setting up a hard take off, the boat came out of the hole very good.
Cajun Gator AirSled Video