3 different fin designs optimized for supersonic flight!

[bayourat]

I think I need to sell those. I haven't been fishing in two years. I could use the money for more rocket stuff. I may keep one or two just in case a fishing trip pops up this spring. But the offshore poles can go. I haven't been off shore in many years. And probobly won't be doing that any more since I hurt my back.

[Jared]

From what I have seen, it takes a good strong back to do offshore fishing. I mean, if you need a seatbelt to fish, then that's a big fish...

[bayourat]

I am giving the fins some filets before applying a layer of fiberglass. I used some thin us composites epoxy thickened with fiberglass pulp and cabosil.

[bayourat]

I built a stand out of three coupler sections and a piece of plywood board. I just finished cutting out the templates for the tip to tip glass. I am going to use 1 layer of 2oz glass. I did the same with the Apogee Aspires I've built. It seems to be sufficient enough to keep the fins on through transonic flight.

[bayourat]

I added some fiberglass reinforcement to the fins. It only added about 10 grams of weight including resin to each rocket. I suspect the filler will add more weight than the reinforcement.

[Jared]

What is the dark lines in the glass? Is that where you marked it for cutting?

[bayourat]

What is the dark lines in the glass? Is that where you marked it for cutting?

I used a Sharpy marker to draw the pattern. The 2 oz glass is hard to work with and requires a delicate touch. Especially when trying to cut these small little patterns. It's easy to mess up.

[bayourat]

I was processing data on my Sims and calculated that there will be aprox. 30lbs. of force pushing down on the rockets at Max. Q. That's a lot of weight for cardboard tubing

[Jared]

I suppose one could imagine taking a 30lb dumbbell and resting it on the top of the tube.

[bayourat]

Lots of primming, sanding, and filling going on.