--- In Indoor_Construction_at_yahoogroups.com, Warthodson@... wrote:
>
So, I decided to build an A6 using supplies a newcomer might not find too intimidating or difficult to obtain. I used 7 Lb/CuFt balsa for the 1/16" Sq strip wood (wing & stab leading/trailing edges, tail boom, rudder outline, prop spar), 6#/CuFt 1/32" sheet wood (ribs, prop blades) & Esaki Japaness tissue (.0088 Gr/SqIn). I used an old motor stick made out of 8#/CuFt wood, but cut the height down as much as possible to reduce weight without having it bend under tension. It was amazing how strong the 8# wood was & how much wood could be safely removed for low ceiling flying.
> To manage the wood volume, the wing is 12" X 2.5", the stab 7" X 2" & the tail boom is 8". The total weight is 1.23 grams.
d> Gary Hodson
>
Very interesting Gary. I too just made an A6--one I figured a newcomer could find materials for, using relatively heavy wood (6.8 lb spars, 7.5 lb motorstick,) and relatively heavy covering (.005g/sq" plstic produce bag.) Yet it came out at 1.72 g flying weight. Would love to do a close comparison with yours sometime, in order to account for the weight difference. I'm sure one source of heaviness on mine is .017" wire for all wire parts, but that shouldn't account for .5 g difference. Also my wing is 16", but your heavier covering alone would overtake my extra wing wood. Maybe my motorstick size is way too heavy, as it doesn't bend much at .5 in/oz.
Very interesting.
Mark F1diddler
Received on Wed Feb 24 2010 - 19:58:10 CET
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