Crayons!!!???

[Dr. Don]

I used my scroll saw for a convenient "clamp" while the epoxy set up on the fin roots at the fin can. You can see how the aft CR re-inforces the soft plastic fin can and the rounded aft edge of the fins...........If you decide to use 2 hour epoxy, you will need DAYS of patience to wait for it to quit running! The masking tape helped to seal the cracks...........

 

[Dr. Don]

Now were getting somewhere!!
The mmt is glued in with a nice thick layer of epoxy inside the fin can. The 1/4 20 threaded rod couples all the way through to the aft CR for extra strength, and gives a nice solid attachment for
the moter retainer strap. I used those nuts with the nylon inserts .........

 

[Dr. Don]

Here's a view down inside the BT : You can see the shock cord I borrowed from the parts bin and the layer of epoxy on the CR.
Also note the vent holes near the top of the BT............

 

[Dr. Don]

Here's the payload stuff: A borrowed drouge chute from the Magnum and a "length" of 1" underwear elastic attached to the old nylon cord ( I think it was from the amraam stock kit)......
Also notice how pretty that slow cure epoxy is on the bulkhead plate!!! And of course the forward launch lug ( from the cardboard tube from the bigger copperhead ignitors).........

 

[Dr. Don]

Aft view with a 38mm motor casing held in with a 3/8"
conduit strap from the electrical parts bin........
I have absolutely no reason for either the number or the size
of the fins.........
When I made up the fin jig out of a piece of card stock, I trimmed it very scientifically to fit on a scrap of luan I pulled out of the scrap bin ( I have lots of bins)...........

 

[Dr. Don]

A little more epoxy around the fins( and painted on the fins)
and we are ready for high altitudes ( and lots of extra attention at the launch)!!!!!!!!!!!!!
Dr Don

 

[Tools R Us]

Looking good Dr. Don, the pictures are great. Get some more stuff on that work bench! ...

 

[Bowhunter]

Well Don it looks differant now

 

[lalligood]

Yesterday we had fantastic rocket launching weather here in Central Florida. Little on the windy side at times but that didn't stop me from putting my Crayon up on a Pro38 I205. It was an *amazing* flight. It did spit the casing (unbelievably, we recovered it!), drifted for quite a while with a chute that was too big, & landed in a tree (although the tallest tree at our launch site is still under 20ft tall). Blessed by the good karma, I did it again but on a Pro38 H153 & a smaller chute.

Here's a pic of it on the I205. Enjoy!

 

[Bowhunter]

Go Crayon Go Heres mine

 

[Ryan S.]

is that two stage?

 

[Bowhunter]

No its not a 2 stager but I think it looks cool