Originally Posted by Wil_Venske
Some time in the past on this forum, the discussion concluded that if the engine is increased to mare house power, the plane would loss it's aerobatic rating. My O-200 does everything I want it to do except fly upside down for extended period of time.
wil A15L WI


That depends... smile

Since this aircraft was built and certified with the larger engine, it would likely retain its approval for aerobatic maneuvers. There should be a list of approved maneuvers on a placard or in the owner’s manual. Brian, Catherine, Tim or other Aerobat owners would know more.

Putting a larger engine in a 150 via an STC, such as a 150HP or 180HP conversion, would most likely restrict the maneuvers allowed because full certification testing is not usuallly done with an STC.

There are exceptions.

Some A150s were omitted from a list of aircraft that were no longer allowed to perform certain maneuvers or intentional spins in the paperwork for one STC. If you want to take an omission as approval... well... I guess it’s your life.

I also know of other cases where an A150 was modified with a bigger engine then received a field approval for aerobatic maneuvers.


David Rowland 7CO0
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