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-   -   What to do? (http://www.oldrocketforum.com/showthread.php?t=11306)

mycrofte 07-01-2012 08:30 AM

What to do?
 
I won a bag of mid power parts in a raffle at GARLO 2012 in Champaign, IL yesterday. But, since I have never built anything that size, I'm not sure what to do with them.

What I have looks about like that Rocwerks Reactor with a twin 24mm engine mount. Since it is a bag of parts there are no fins included. The closest thing I have seen, that I like, is the Little John missile.

Only real problem is that I have never done through wall fins or a dual engine mount. And, have no idea how to attach the 24" parachute. All I have ever used are the tri-fold Estes type shock cords...
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chadrog 07-01-2012 11:57 AM

Do some digging in the various mid-power forums, that should give you everything you need. I'd be happy to take it off your hands otherwise. :D

tbzep 07-01-2012 05:35 PM

It's free so experiment, build, and fly. You won't be out any cash if you mess something up. :)

mycrofte 07-01-2012 06:16 PM

It wasn't complete, so I'll have to spend a little. Just thought there might be enough folks here with BT-80 rockets to get some ideas before I commit to a semi Little John.
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tbzep 07-01-2012 06:30 PM

Quote:
Originally Posted by mycrofte
It wasn't complete, so I'll have to spend a little. Just thought there might be enough folks here with BT-80 rockets to get some ideas before I commit to a semi Little John.
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I've got a bunch of BT-80 rockets, up to 7.67" dia. :)

TTW isn't hard to do and there are several easy options for mounting your shock cord.

mycrofte 07-01-2012 07:40 PM

If any of that information is here point the way!
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mycrofte 07-06-2012 05:52 PM

2 Attachment(s)
Well, after watching several Apogee videos, I got a good start on it. I had almost forgotten those videos were there, let alone showing the techniques I needed. And, I was surprised how fast Tim answered all my questions.

So, here is what I have so far. Engine mount and fins dry fitted. My make shift baffle is still drying...
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mycrofte 07-08-2012 05:19 AM

I painted it red with white fins to see how it would look.

Can't seem to come up with a name though. So far I'm going with "Double D".
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tbzep 07-08-2012 11:06 AM

Looks good. :cool:

mycrofte 07-08-2012 02:37 PM

Unlike some of you, I don't fill in spirals.

After landing in the dry dirt of a corn field and being repaired, the spiral is about the only detail left on some of my rockets.

But, I have the baffle glued in and it is looking good so far. Still not sure if I want the fins white or yellow. Some of the paint jobs I've seen red and yellow look really sharp.
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mycrofte 07-10-2012 01:16 PM

1 Attachment(s)
Thought I would post another picture now that it's painted. Far from finished since I'm making up the paint scheme as I go. Tried two different fin colors but like the yellow best.
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mycrofte 07-10-2012 04:13 PM

Almost forgot.

Since this is a mid power rocket, should I double up the shock cord or buy bigger than 3/16"?
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tbzep 07-10-2012 06:10 PM

Quote:
Originally Posted by mycrofte
Almost forgot.

Since this is a mid power rocket, should I double up the shock cord or buy bigger than 3/16"?
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I have no idea what it weighs, but I'd use at least 1/4" or 3/8".

1/2" won't hurt as long as there's room for it. Too small is catastrophic. Too big is just a minor weight penalty.

mycrofte 07-10-2012 06:22 PM

Well, it is a 2.6" tube about 18" long. So, even with the baffle in it, there is a lot of room.
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tbzep 07-10-2012 07:17 PM

Quote:
Originally Posted by mycrofte
Well, it is a 2.6" tube about 18" long. So, even with the baffle in it, there is a lot of room.
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I'd go with 1/4". The 3/16" that Estes kits uses is pretty flimsy and I generally replace it, but if it's good heavy duty stuff it will be ok.

mycrofte 07-14-2012 04:14 PM

So, I went with the 3/8" elastic from Wal Mart. I also made the paper mount twice as big as my regular Estes type rockets.

The elastic came in a 6 foot piece. Should I go double the rocket (4') or use it all?
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tbzep 07-14-2012 05:52 PM

Quote:
Originally Posted by mycrofte
So, I went with the 3/8" elastic from Wal Mart. I also made the paper mount twice as big as my regular Estes type rockets.

The elastic came in a 6 foot piece. Should I go double the rocket (4') or use it all?
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More is always better. ;)

chadrog 07-14-2012 06:15 PM

As long as you have the room, use it all - 6' is by no means too long.

mycrofte 07-16-2012 09:24 AM

1 Attachment(s)
Well, it is as finished as it is going to get. Looks like crap up close though. I wanted to put a coat of clear gloss over it and it came out beaded for some reason.

I had to sand about half of it down and redo some of the paint job. I was a bit ticked about it and did a half-a$$ job to get it done. I was temped to sand the whole thing and start over!
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mycrofte 07-22-2012 07:53 PM

1 Attachment(s)
Thought I would put up one last picture of it with decals. Just a pack of peel & stick letters from Hobby Lobby.


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