In general, most of us make ribs by using templates and cutting by hand. This method is plenty fast, as I can cut out a rib every 10 seconds or so using an undercut template. Some people will bend their stock to shape, but I found that to be too time consuming. Unless you are confident in your 2d cad skills and have easy access to a laser cutter, hand cut is still the fastest. The third alternative is to buy a kit.Hi,
So I did his event last year and it was fun but time-taking. So last year I did everything by hand (e.g. the camber), this year I have more of a time constraint so i'm going to have to work faster. The fastest solution I came up with is laser cutting my pieces. If anyone does this could I some tips?
If you decide to go this route, you can 3d print templates to bend around. Keep in mind that the balsa will spring back a little when it dries, so make your template slightly more curved than your intended camber.We simply bend some 3" wide stock to shape. This is a 5-minute job. We find a plastic bucket, container, or something that has the right radius. Or we band-saw a piece of 2x4. Then briefly wet the piece of balsa, lay it on the curve so that the grain follows the curve (bend it the "hard" way). Tape it down with blue tape (2" wide). Put it in the microwave for a few minutes until dry. Then slice it with a Master Airscrew balsa stripper.
This puts the grain following the camber, making a stronger rib than simply cutting it from sheet stock.
I think you need a rubber motor with a thicker cross-section. Last year at nationals I used 0.052 and got 4th, but you need to remember the new changes for this year. Did you change your propeller from the 14cm to 24 cm? 0.065 will definitely not work with a 24cm propeller. The freedom flight kit this year comes with a 24 cm propeller and the thinnest rubber provided in the kit is 0.087. Also, remember the new minimum weight. Last year's minimum weight was 7 grams. This year it's 8 grams. It may not seem like a big difference but it actually matters quite a lot.So I've used last years Freedom Flight Model and transferred all the measurnments to this years. However, my plane has trouble gaining lift, and so it just goes downwards. The weight is about 8.3g and the rubber motor is 65 and is about 2.3 grams. I wind it about 1500 times. Can someone help me with the lift? It see,s like it doesn't have enough power... Thx.
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