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Jun 07, 2004, 09:50 PM
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How to determine a good engine size?

Hi there! I'm just starting out in this hobby and just recently purchased a TT Pro .46. I'm curious as to how one can determine which is a good engine size for them. I'm not planning to build a behemoth or anything like that, but I do want to be able to go HIGH HIGH up and take aerial photos.

Does the idea "Bigger is always better" apply to how one should determine to which engine they should buy?

What would warrant a person to buy a .61 instead of a .46 engine? Have I made a bad choice for what I'm seeking to do? Thanks!
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Jun 08, 2004, 03:04 AM
Registered User
Engine size relates mainly to the size and weight of plane you want to fly. Bigger engine, bigger heavier plane.

Sailplanes have no engine at all and they can sometimes fly very high indeed .

Jun 08, 2004, 10:21 AM
Registered User
heres a little graph that I used when I first started flying.10-.15about 3lbs/..20-.30 up to 4lbs./40--.60 size-5 to 6lbs.a little more engine on the weight of the plane will just give you more vertical.
Jun 08, 2004, 10:00 PM
Registered User
Your TT.46 is a great engine for 40 size planes, any larger plane and one usually installs a larger motor. Once one gets to the 120 size birds the small gas motors work well.

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