Pete's Planes
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Martin SeaMaster
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Update June 2008 Now fitted with 49 gram outrunners [Kv = 2300]......5 x 3 props [cut from Master IC 6 x 3]........3S lipo,2.5 Ah.......weight now 49oz.........wing loading 18 oz/sq ft. Pre-flight test: 19,600 rpm.....250w from battery [82w/lb] Model is hand-launched and landed on grass. Flight video: http://www.rcgroups.com/forums/showthread.php?t=911728 ------------------------------------------------------------------------------------------------------------------------------ |
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Original notes First flight 1999....span 53"....62oz....22 oz per sq ft....2 * Graupner 480 race....Grish 6 * 4 LH....8 sub C....rudder and elevator controls....mostly balsa.... Crashed only one month after first flight; recently rebuilt (2003). Possible cause of crash...rear bands on wing not tight enough. This wing planform puts large loads on the rear bands, and any lifting at the TE will produce unmanageable nose-down trim. [Later events suggest that the real cause was a transmitter fault].
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