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Post  ian1954 Sat Mar 22, 2014 7:00 pm

Magnum GP .15 RC Magnum10
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Post  Jason_WI Sat Mar 22, 2014 9:28 pm

I have that exact same engine. Except someone used a drill to locate the mounting holes and took a crescent shape bite out of the exhaust port flange. I fixed it with JB weld but not sure how well it will hold. This engine was never run. I got it in an engine lot.
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Post  RknRusty Sat Mar 22, 2014 11:36 pm

It looks like an OS. Is it an OS knockoff?
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Post  Mark Boesen Sun Mar 23, 2014 12:09 am

lol, I think all the Magnum/Thunder Tiger engines are O.S. knockoffs!
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Post  GallopingGhostler Fri Jul 04, 2014 9:12 am

I've got that engine in an old, Hobby Shack Cessna 150 foam ARF. The Thunder Tiger Magnum GP15 is a really nice engine, powerful, pulls this beast with authority.

Magnum GP .15 RC Cessna10

Magnum GP .15 RC Cessna11

Photos courtesy of Gary Jones, MADS R/C Club, Clovis, NM.
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Post  ian1954 Fri Jul 04, 2014 12:15 pm

Another model that suits and engine (or the other way around!).

What do you use to stop the fuel damaging the foam?
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Post  Ken Cook Fri Jul 04, 2014 3:20 pm

It was my understanding, that the designer of these engines originally worked at OS. Upon leaving that company he took many of his designs that were specific to him. He was able to produce these engines and many were badged with his new company logo. Some of the designs were actually improved upon such as true ABC setups vs the traditional ABN that OS uses. Is the Magnum GP .15 a true ABC engine? I know that the ball bearing variants are. I also know that many of the parts interchange with the Magnum vs OS. We use a lot of these and the Norvel BB for .15 size combat.
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Post  GallopingGhostler Fri Jul 04, 2014 5:06 pm

I looked at my instruction manual for the Magnum GP's. To clarify, interestingly enough, the back of the instructions has Thunder Tiger as the manufacturer. There is no mention on the engine box or instructions whether ABN or ABC is used. The current lot of GP engines listed under the Thunder Tiger name are ABN.
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Post  GallopingGhostler Fri Jul 04, 2014 5:16 pm

@ian1954 wrote:Another model that suits and engine (or the other way around!). What do you use to stop the fuel damaging the foam?
It is standard white foam, expanded polyurethane polystyrene I guess. Haven't had any problems with fuel damaging it.
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