Series of flights by the 13" Martinsyde S.1 in Wawayanda, NY on
12.13.15. Attention to CG, tail surfaces, and the use of Gurney flaps on both side wing panels helped to dial her in. Plan: http://www.hallmanstudio.com/Martinsy...

*** 10 steps to trimming a rubber model, by John Koptonak: http://www.flyingacesclub.com/PFFT/Tr...

For more info on freeflight rubberpowered models, check these websites:
http://www.easybuiltmodels.com/
http://www.volareproducts.com/BUY/
http://www.flyingacesclub.com
Outerzone https://outerzone.co.uk/index.asp
National Free Flight Society https://freeflight.org/
Mike Stuart's Flying Scale Models http://www.ffscale.co.uk/
https://www.freeflightsupplies.co.uk/...

Flying Aces Club merchandise: https://www.cafepress.com/flyingacesclub
Center of Gravity merchandise: https://www.cafepress.com/centergravity