Weight:453.5 grams/ 16 oz (no electronics) or 1190.6grams/42oz (w/electronics)
New weight: 255 grams without electronics Prop size (designed for): 9'' Prospected weight when finished: 276.691 grams /9.7oz (no electronics) or 736.5 grams/ 25.97oz (w/electronics)
The frame is not completed the spring is supposed to be in the aluminium tube. I chose to use a bolt so I could extend the landing gear and adjust the stop and spring tension.
I plan to cast the ends in a mold and use square fibreglass tube as spreaders.
Therefore 20 solid cubic inches of fibreglass weighs 1.1 pound, and 20 solid cubic inches of aluminium (alloy 6061 T-6) weighs 2.0 pounds. The frame would weigh approximately 0.61 pound. Of course the fasteners take up more of the weight.
If anyone knows where I could get some sort of strong but lightweight composite/epoxy that can be molded/cast, I would REALLY appreciate it.
UPDATE: Cut the weight down by almost half. I dropped the landing gear off and replaced them with simpler design. I can still bolt them back on if needed. i also had to add lights .
Click for pictures
Here are my latest additions.
Latest (Revision 4)
I added a aluminium battery holder, the battery makes a nice click and is held pretty well, I'll probably add some Velcro to keep it in even better.
I also added lighter legs that are bouncy (not finished in picture) and bolted the motors down, as the screws vibrate loose.
A little perhaps, I did this more as a concept with cheaper material, I plan to build a lighter frame from fibreglass tube, it will weigh around 208.45 grams. My motors generate ~6ibs of static thrust and 2 of which will be taken up by the parts and accessories. That still gives me a 2:1 thrust:weight ratio.
Thanks for the input. I was wondering the same, if nothing else it will drain my already limited battery life. I have yet to decide whether to use fibreglass tube or cast it, I think I may cast the ends and use the tube for the spreaders. Do you know where to get any carbon-fibre/plastic channel or square tube?