Level 3 Build Frenzy 4" (+1 other 75mm rocket)

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english_1969

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Well,

I final got approval from my TAP to start building. I'm building a 4", 75mm Frenzy that I bought, ironically enough, at last year's Madcow Black Friday sale.

I'm planning to fly on either a CTI M840 or an AT M1297. I'm pretty bad about taking pictures during a build, so I'm making an attempt at that this time. Here is the first batch. I'm also building a 4" Competitor 4 with a 75mm mount at the same time. They are similar enough and will help keep it from sitting for another 6-8 months.

I'm using Aeropoxy 6209 for the MMT, but I've switched to 6279 for the fin attachment and the outer fillets.

Start of the motor mount and AP retainer
2012-11-06-234921-PB060074-StylusTough-6020.JPG


Same for the Competitor
2012-11-06-234910-PB060073-StylusTough-6020.JPG


Attachment of the shock cord on the competitor
2012-11-07-220928-PB070078-StylusTough-6020.JPG

The shock cord is tubular kevlar and the end under the second centering ring has a dowel rod embedded and sewn ends. This along with the epoxy will be strong enough but clean.

Both motor mounts completed
2012-11-09-211609-PB090082-StylusTough-6020.JPG


Initial attachment of the fins
2012-11-18-170038-PB180084-StylusTough-6020.JPG


2012-11-18-170046-PB180085-StylusTough-6020.JPG


Almost done with fin attachment:
2012-11-20-105335-PB200002-FE46%2520X41%2520X42.JPG


Ready for outer fillets:
2012-11-21-170947-PB210004-FE46%2520X41%2520X42.JPG


Fillets on the Competitor:
2012-11-21-234253-PB210007-FE46%2520X41%2520X42.JPG


Fillets on the Frenzy:
2012-11-21-234424-PB210008-FE46%2520X41%2520X42.JPG


So pretty:
2012-11-21-234433-PB210009-FE46%2520X41%2520X42.JPG
 
Looking good! I got the 4" Frenzy in the cardboard variety last year..It still sits in it's box:roll:
 
That fact has really made me think a bit more about the BF sale frenzy. I have a couple of other rockets that are even older than a year that I'm now wondering if I'm even going to build them.


As are my Seahawk and PAC-3 missiles (BF sale 2011) :blush:
 
I love that fact you used an Estes fin alignment guide on a L3 build... hahaha....

Looks goods, best of luck.
 
I have my Frenzy XL (from last year's sale) almost done -- just need to get the fillets on there, and finish up some details with the nosecone.

Nice kit!

-Kevin
 
Well, I'm finally getting around to getting these rockets finished.

Here is a shot of the av-bay sled. In case you are wondering, the switches will be inside and accessed through holes in the switch band.

2013-01-25-100710-P1250016-FE46%u00252520X41%2520X42.JPG
 
It's 1/2 tubular with a tight weave. I believe I purchased this from someone on e-Bay -or- from giant leap rocketry -or- from rocketry warehouse.

I've had it for a while so I apologize for not being exactly sure where it came from.

W
 
Uh, one of your questions was "Where did you get this?".

Why don't you read that again .....REALLY slowly.

I didn't ask where people can buy Kevlar. I asked where HE bought that very specific Kevlar in that picture.
 
Oh, OK. That was not phrased very well, then. It should have been "Where did YOU get this" if you wanted to ask that question...
:)
 
Hey Jello I sent ya a PM with link but I don't think they carry this particular SC anymore.I bought 100' of the same stuff back in their 2011 BS sale.Maybe give them a call.

Still chuckle'n about 1/4 or 3/8 SC on a L3 rocket.....:eyeroll:
 
Attachment of the shock cord on the competitor
2012-11-07-220928-PB070078-StylusTough-6020.JPG

The shock cord is tubular kevlar and the end under the second centering ring has a dowel rod embedded and sewn ends. This along with the epoxy will be strong enough but clean.

Cool idea I'll have to make note of that.I'm also going for the L3 with the Frenzy XL,great kit for the price way back in that BS sale.
I mopped a epoxy/carbon fiber mix over my SC.This way seems much easier and less messy.
 
Oh, OK. That was not phrased very well, then. It should have been "Where did YOU get this" if you wanted to ask that question...
:)

That's exactly how he did phrase it. You're in no position to criticize anyone, for anything.
 
OK, lets stop this hijack and let english-1969 continue on with this build...

Oh, will this be flying at Bayboro?
 
Forgot to note these:

1) Internal fillets
2012-11-24-091303-PB240003-FE46%2520X41%2520X42.JPG


-epoxy
2012-11-24-091624-PB240005-FE46%2520X41%2520X42.JPG



2) Nose cone - added 5 oz of lead shot to the epoxy.
2013-01-26-164307-P1260003-FE46%2520X41%2520X42.JPG


3) AV Bay wiring
2013-01-26-164216-P1260001-FE46%2520X41%2520X42.JPG


2013-01-26-164245-P1260002-FE46%2520X41%2520X42.JPG
 
3) AV Bay wiring
2013-01-26-164216-P1260001-FE46%2520X41%2520X42.JPG

A question on the rounded aluminum supports for the switches.... I assume that's done to make them more accessible from outside the airframe? Do they hold the switch basically just at the ID of the coupler they're in?

-Kevin
 
Kevin,

You are correct, these slide in and align to the vent holes on the switch band. THis serves the purpose of the vent holes as well at making the switches accessible with a screw driver.

In previous builds, I placed the switches on the outside. I wanted to try this due to some inspiration from some of my local "senior" flyers.

I also referenced Vern K's designs with the wood block. I thought I'd try a twist on that with the arc'd aluminum.

It has been fun to get everything lined up :)

W
 
Well,

Unfortunately, I haven't kept up with the picture-taking. I'm going to attempting my L3 this weekend at Bayboro, NC on an M1297 now.

I did take some video of the ejection charge test.

[video=youtube_share;_nARNffvACk]https://youtu.be/_nARNffvACk[/video]

W
 
A question on the rounded aluminum supports for the switches.... I assume that's done to make them more accessible from outside the airframe? Do they hold the switch basically just at the ID of the coupler they're in?

-Kevin

Yes please more detail on this, including how you bent them. That looks genius.
 
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