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Old Jan 03, 2002, 04:19 AM
Registered User
Stockholm, SWEDEN
Joined Jan 2001
19 Posts
Avro Mk IV Triplane Motor suggestion


I have just bought a R/N models Avro Mk IV triplane kit that I intend to convert to RC. The kit is a FF-kit originally for a Cox .020 or a "Hytork 48" electric. Prop size has to be around max 5" for not hooking into the rigging.

Has anyone made this conversion and can give me some hints or has anyone a motor suggestion for me?

Thanks in advance and best regards,
Patrik Delin
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Old Jan 03, 2002, 10:34 AM
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Martin Irvine's Avatar
Canada, ON, Kingston
Joined Aug 2000
2,037 Posts
Can you let us know what the wingspan is and area?
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Old Jan 03, 2002, 05:36 PM
Balsa Flies Better!
Stamford, CT
Joined Oct 2000
6,761 Posts

If you're certain that it can only swing a 5" prop then four choices come to mind- - HY-50F - good up to maybe 5 ounces or so, (lightest option)-
HY-50B swinging a Tern 6" prop (if it'll fit- good up to 6.5 ounces

Speed 280 direct drive- maybe your best bet- I've flown several planes that originally called for 020s on this motor swinging a 5" prop, but it's not an ideal setup- max around 8 ounces
Astro 010 brushless direct drive- a bit heavier, but more power than the 280.- Max- maybe 14 oz but I'll bet your airframe gets too heavy. Really, you want to swing closer to a 7" prop- even a 6" prop would help- that will improve your flight performance dramatically.

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