Manufacturer: | Scratch |
Brief: Construction:
Nose Cone: I can change the rockets weight in under a minute. The only problem was the allthread sticking out of the tip of the NC. I was going to fake it out with glass and epoxy, but since I had cut the tip off the PML NC for the boat tail, I had a perfect tip to put over the allthread. I took an extra piece of allthread, put a nut on it and heated it up with a torch. Then took the tip of the PML NC and sunk it into the HOT nut that was on the allthread. This worked out better than I had hoped. I now had a tip that I can screw onto the allthread, and I finished it off with sand paper to make a perfect fit. |
This is a complex rocket with way too many gotcha's. First off I had to cut the 3/16" slots down the boat tail. This was not easy. Actually it was, but getting the lines straight was hard. I used a dremel tool with extension. One fiberglass cutting wheel sandwiched with three small cutting wheels on each side of that gave me the 3/16" needed for the fins. After I got the lines straight I followed them with the cutting jig making perfect 3/16" slots in one shot. Construction of the nose cone was a bit hard also. See above description for details. Everything fit nice and the rocket is very sturdy.
Flight:
Any 38mm H motor will send this guy up nice. I haven't tried the J-570 yet, but
I think it will handle it fine. I chose the H-242 for it's first flight. I used
a stainless steel pot scrubber for a baffle inside the MMT. I used some small
allthread epoxied into the back centering ring with a custom bracket with nuts
and washers for retention. The rocket flew very straight on the H-242. I just
stuffed the cord into the airframe with the chute and connected the harness
with 3/16" quick links. The rocket was recovered about 900' from the pad
with no damage at all. Deployment occurred around apogee.
Summary:
Pro's..... A very fun and challenging rocket to build. It looks nice too. I
love those V-2's. Con's..... Price. The nose cones were $14.00 each. 4" BT
$5.00. 3/16" birch fin material $4.00 with extra left over. 38mm MMT
$3.00. Baffle $2.00. Kevlar® $22.00 for 100'. 3 feet of 1/4" stainless
steel allthread $4.50 Stainless washers and nuts $5.00. Lead fishing weights
$4.00. Fiberglass 6oz $5.00. Epoxy $3.00. Chute $8.00. Quick links $4.00. That
brings the total to around $80.00, but I had enough BT to make 2 more V-2's and
some other stuff left over as well.
Other:
One good tip..... It is very hard to cut slots in the boat tail without a
vertical mill or some other tool or custom jig.
( Contributed - by Gary Sinclair - 11/13/05) Brief: Always a nice rocket to build is the V2. For mine I wanted to use 6" tubing so I could build it around two 6"x19" Scotglas nose cones. (The boat tail is a nose cone with the top missing.) My aim was to build a V2 capable of taking an L motor and dual deployment. Construction: The parts list: 2 19" V2 ...
( Contributed - by Kevin Mclaughlin - 11/15/02) Brief: Scale model of infamous German WWII V-2 in 3.9" dia x 37" tall scale with 29MM motor mount that can handle up to 29 x 240 hardware. Empty weight of this rocket is 53 oz including nose cone weights for a G64 RMS. VCP is at 12.7" and CG at 16.8" fully loaded with G64 RMS, tubular nylon shock chord and 45" ...
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