Bill,
I have always agreed with the argument about the difficulty of finding good
wood in local hobby stores. We don't have any local sources of good balsa.
But to build any indoor model requires ordering supplies such as rubber,
film/tissue, bearings, props, etc. so ordering good wood from one of the many
suppliers should not be a major stumbling block. Your discussion of wood got me to
wondering how much weight difference there was between film & condenser
paper or light tissue paper.
Assuming an A6 with 30 sq. in. wing area, 15 sq. in. stab area & 5 sq. in.
rudder area = 50 sq. in. total area.
The only film weight I have a record of is Y2K at 0.0004 gr/sq. in. = .02
grams
Ray Harlan condenser paper = .004 gr/sq. in. X 50 sq. in. = .18 grams
Gampi tissue = 0.005 gr/sq.in. X 50 sq.in. = .25 grams
Japanese tissue = .007 gr/sq.in. = .35 grams
There is no question that film would help to build an A6 down to 1.2 grams,
but I think it is going to require good, light (4 to 5 Lb.) wood regardless of
the covering type.
Gary Hodson
In a message dated 11/22/2008 9:14:36 A.M. Central Standard Time,
b.gowen_at_comcast.net writes:
The 1.2g weight limit for A-6 coupled with the requirement for paper
covering actually makes a competitive A-6 pretty difficult to build
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Received on Sat Nov 22 2008 - 07:44:13 CET