38 mm Minimum Diameter Build

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38 mm Minimum Diameter Build

Postby onebadhawk » Tue Jan 28, 2014 1:16 pm

I've said before,,,,,
What I love about rocketry is it seems to me
to be a long series of-----
You are posed a problem,,,,,,, find a solution to it..........

I am trying to use my normal avionics bay construction
method's on a 38 mm fiberglass coupler tube........

To say there isn't a lot of room in there would be the understatement of the year.......

One thing your going to hate,,, Jimmy for sure,,,,
I used plastic rivets on it,,,,,
Boy do they look huge on a 38 mm airframe.......lol
The avionics bay is so tight I had to make it 1/2" longer then necessary
just to have room for the 3 rivets to protrude through the wall into the bay,,,,,,
They weren't even close to fitting where the sled is..........

It's coming out really nice though,,,,,,,,
I can't wait to show you guys.........

The next launch is the maiden for the 3" build I did........
I'm not sure yet,,,,
but I don't think this 38 mm bullet will be ready for it's maiden by the next launch..........

Teddy
Ted Chernok
NAR # 87063 SR
Tripoli # 14443
Level 2
onebadhawk
 
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Re: 38 mm Minimum Diameter Build

Postby Jim Z » Tue Jan 28, 2014 1:29 pm

Sounds really cool Teddy. Indeed there can't be much space to work with in that bay. Glad to here you've worked something out.

As January soon slides in February, I realized this week that I better get scootin' on some projects I hope to fly come Spring. I got off my rear and ordered some supplies including some much needed epoxy. I should have some of the loot in my hands by the weekend. Now if I could just get some time free to work on things. I spent most of last weekend at work and could have the threat of the same this weekend. At least it isn't warm and sunny out yet while I'm stuck inside. LOL
Jim Z
NAR 91938 L2
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Re: 38 mm Minimum Diameter Build

Postby onebadhawk » Tue Jan 28, 2014 6:17 pm

I just finished the av bay...............
It's so tight---------------
I had to build in room for the rivets,,,,
I had to get special 2/56 nylon shear screws that protrude 1/32" in to the bay,,,,,,
The round black 2 pole switch I always use,,, drilled through the sled fits barley from one side of the bay to the other.........
When you insert the screwdriver through the airframe from the outside to turn on the switch the tip of the blade
goes into the vent hole 1/4" ( keep in mind the combined thickness of the airframe and the coupler tube is half that at 1/8" )........
The 2 pieces of threaded rod are 6/32,,, the sled fit perfectly,,, then I epoxied on the 4 Estes launch lugs ( after sanding off the glassine coating ),,,
a bit of moto tool and it still fit perfectly,,, the edges of everything is right up against the glass tube,,,
didn't have enough room for the nuts and washers to hold the sled in place,,,,,
had to grind down the nuts and washers on one side after everything was "fixed" where I wanted it......

Very cool rocket,,,,,,,,
Absolutely with out a doubt my most challenging build yet..........
I'd kinda like a break from building for flying,,,,,,,,,,,,,,
But,,,,,,,,,
I am ready for the 4" build............
Let me at it..............

Teddy

I don't know how you guys are always taking pics while your building........
I'm focused on building,,,,, not pic ing..........
Ted Chernok
NAR # 87063 SR
Tripoli # 14443
Level 2
onebadhawk
 
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Re: 38 mm Minimum Diameter Build

Postby Plastic_Gorilla » Tue Jan 28, 2014 9:20 pm

Can't wait to see it Teddy! sounds awesome!
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Re: 38 mm Minimum Diameter Build

Postby onebadhawk » Tue Jan 28, 2014 11:26 pm

Thank you Pete,,,,,,
I really am sorry for all the rivets,,,,,,,,,
But I like keeping options open and available,,,,,,
An extra set of 3 rivets makes me able to change the shock cord.........

Jimmy and Coleman are gonna say------
Awwww mannnnnnnnn,,,,,,,,
get that garbage outa the slipstream mannnnnnnnnnn..........lol...lol...

Teddy
Ted Chernok
NAR # 87063 SR
Tripoli # 14443
Level 2
onebadhawk
 
Posts: 1403
Joined: Sun Jan 13, 2013 11:12 am
Location: Old Bridge, New Jersey

Re: 38 mm Minimum Diameter Build

Postby onebadhawk » Tue Jan 28, 2014 11:27 pm

Ooohhhh,,,,, ooohhhhhh,,,,,,

Pete,,,,
Your going to like the 3" build I just did,,,,,,
I think that's more your cup of tea.................

Teddy
Ted Chernok
NAR # 87063 SR
Tripoli # 14443
Level 2
onebadhawk
 
Posts: 1403
Joined: Sun Jan 13, 2013 11:12 am
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Re: 38 mm Minimum Diameter Build

Postby Plastic_Gorilla » Wed Jan 29, 2014 9:23 am

Is this the ones that you had send away for the swoopy fins?

Can't wait to see!
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Re: 38 mm Minimum Diameter Build

Postby onebadhawk » Wed Jan 29, 2014 3:05 pm

No, No, Pete,,,,
That's the 4" build I haven't touched yet...........

This 3" build is kind of a conglomeration of parts if that makes any sense.......

But it is a bit more retro then the sleek 38mm min.......................

Still doesn't have your curves though.............

Oh well.................

Teddy
Ted Chernok
NAR # 87063 SR
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Level 2
onebadhawk
 
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