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Jul 28, 2013, 09:50 PM
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Great Planes YAK-55 3D Foamie Brushless Conversion


My son has a Great Planes YAK-55 3D Foamie. There's an old thread about the plane here: https://www.rcgroups.com/forums/showthread.php?t=345428

The brushed motor and stick came loose the other day and the gear box threw a tooth and became insanely noisy, so I decided it was time to mod it to brushless. The plane weighs in at just about 1.0 lb with power system and 1300 mAh 3S, so after some pondering and comparing motor weights, I decided on a HobbyKing Park450 890kv. I bought a 10mm aluminum stick mount from Smallpartscnc on eBay.

The motor and prop including the aluminum mount came in about 6 grams less than the stock motor, gear box and mount assembly. The stick mount fit the stick perfectly and I just trimmed the stick so that the prop was in its original position with the new motor installed.

I had to switch out the brushed ESC with a brushed ESC. I had a Turnigy Red Brick 30A ESC from another project.

I used the original 10x4.7 prop; however, I had to ream out the hub so that it would fit on the furnished prop adapter.

The proof was in the pudding. The airplane will now hover and it has very good overall vertical performance. It sounds so much better in the air! The motor is very quiet and you can hear the air flow around the model. This was a worthwhile mod in my opinion and the Turnigy Park450 with the SmallPartsCNC stick mount, and Red Brick 30A ESC is a perfectly easy swap out brushless power system to make this classic foamie even more fun to fly.
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