> The weight of the BOT is around 60 oz. or 3.75 lbs. The rubber > should have a cross section (unstretched) of around 0.1 sq. in. That > weight of rubber is usually described by words like "standard", "3 > meter", "L" or "heavy duty".
A good rule of thumb is that the rubber should have a tension equal to 3 to 5 times the weight of the plane being launched. The variable is the strength of the plane. A strong composite plane can probably take up to 8 times it's weight in pull, but do you really want that? My 2m comp. rubber would be about right for a semi fragile 3.6lb plane because it has about 12lbs of pull at a medium stretch. If you normally fly with a bunch of guys with 3m and you also fly 3m planes, you will probably want the 3m tubing to be more versatile, but you may not be able to stretch it as far with the fragile plane and may not make it to the top of the launch if you under stretch the rubber. Again, I will wait and listen to the "sages" on the list who have experience with the BOT. Mark Mech www.aerofoam.com RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
