XXtreme Blue

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mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

XXtreme Blue

Postby mdutch » Tue Feb 23, 2016 12:38 pm

So here is my next project, I actually started this about four years ago. I guess now is as good as any time to finish it, I'll try to have it ready by URRF 3
'XXtreme Blue'
There is all 6" blue tube for the airframe. Starting on the left is the fin can/motor mount. It has 1/2 plywood delta fins mounted thru the wall to a 4" motor mount with an Areo Pac motor retention already assembled. At the top of it you see the BluT coupler, inside it is a section of sliced BluT to make the coupler a double wall construction. The short section to the right is the drogue bay with the altimeter bay in the top of it, the Alt bay will also be Dbl wall const. To the right of that is the Main chute bay along with a pile of cut bulk heads cut out of 3/4" birch plywood. Then to the right again is the conical nose cone,
the whole rocket will be +/- 12' tall.
I'll add more detailed photos to our URRG forum as soon as I get started on the project.
IMG_20160222_153548_509.jpg


FYI; the big tubes, FG nosecone and FG fins you see behind this and in the blue recycle bin are for a Nike Smoke project that will be a future build sometime in the future. (This is another project I have been collecting parts for since LDRS 31)
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

DBMcCann
Posts: 103
Joined: Thu Nov 05, 2015 9:22 pm

Re: XXtreme Blue

Postby DBMcCann » Tue Feb 23, 2016 10:15 pm

Holy gods that smoke is huge.

the 6" blue looks fun as well. I like the fins.

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Tue Feb 23, 2016 10:19 pm

DBMcCann wrote:Holy gods that smoke is huge.

the 6" blue looks fun as well. I like the fins.



Thanks Dave

Started looking at and thinking about what to do first on this.
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

DBMcCann
Posts: 103
Joined: Thu Nov 05, 2015 9:22 pm

Re: XXtreme Blue

Postby DBMcCann » Tue Feb 23, 2016 10:22 pm

I usually sand things until I can't avoid doing the av-bay any longer ;)

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patelldp
Posts: 160
Joined: Thu Nov 05, 2015 5:07 pm
Location: New York

Re: XXtreme Blue

Postby patelldp » Wed Feb 24, 2016 9:49 pm

Those fins have incredibly long roots...hope you got them in there straight!

Like the design. That Smoke is pretty large, I'd love to build one of those someday!
Dan Patell
TRA 10904 L3

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Thu Feb 25, 2016 7:38 am

patelldp wrote:Those fins have incredibly long roots...hope you got them in there straight!

Yea Dan, they're straight, that was a pain in the a$$. It's one of the reasons the fins are covered in CF.
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Mon Feb 29, 2016 11:58 am

So I'll start with finishing up the fin can coupler. Since I wanted to use a double bulkhead for the top I had to go down to the local rocketry parts supply center mistakenly called Home Depot to acquire a 'U' bolt with threads long enough to extend out both sides of the doubled bulkhead.
IMG_20160229_095547_464 (2).jpg

Though you can't see it here the threads at the top have a nut and washer on them to help compress the bulkheads together.

This assembly will be the harness attachment point at the top of the fin can/motor mount section of the rocket.
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Mon Feb 29, 2016 12:41 pm

Here are the coupler parts.
IMG_20160229_095547_464 (3).jpg

I'll start by epoxying the bulkhead in. I'm using 15 minute Bob Smith Industries epoxy here and adding some micro balloons to thicken it up so it will stay where I want it to. I also want it to seal the bulkhead in for an epoxy step later.
IMG_20160229_100152_388.jpg

Here you see the interior of the coupler with the bulkhead epoxied into place.
IMG_20160229_120535_437.jpg
Last edited by mdutch on Wed Mar 23, 2016 7:16 am, edited 5 times in total.
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Mon Feb 29, 2016 12:53 pm

Here you see the exterior of the coupler assembly, it is recessed for a reason that will be explained later
IMG_20160229_120819_171.jpg
Last edited by mdutch on Tue Mar 22, 2016 5:34 pm, edited 2 times in total.
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"

mdutch
Posts: 72
Joined: Mon Nov 09, 2015 4:01 pm

Re: XXtreme Blue

Postby mdutch » Wed Mar 09, 2016 5:24 pm

OK, so now the coupler is epoxied into place.
IMG_20160309_102608_008.jpg

Here you'll also see the altimeter and drogue bays ready for the next step in the build.

What you can't see too well is that on both the interior and exterior of the coupler I poured in enough epoxy to embed the 'U' bolt nuts so they will never come loose.


One last thing I should point out is the pressure relief hole I drilled into the top of the coupler bulk head which will make sliding the 98 mm motor in and out of the fin can sssoooooo much easier.
IMG_20160308_131654_088.jpg


Here is a view of the aft end of the fin can/motor mount with the Aero Pac retainer in place. you can also see where I took two short sections of coupler, I cut one to slide it inside of the other, then I glued this into the end of the tube to help the end to be less likely to be damaged due to hard landings.
IMG_20160301_131503_322.jpg
Mike Dutch
URRG & MRSI Founder
TAP L3CC
"I just want to fly ROCKETS"


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