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Author Topic: Re: Extreme Wildman  (Read 35926 times)
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wolflair
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« Reply #14 on: January 01, 1970, 10:00:00 AM »

looking good so far Cool Cool
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« Reply #15 on: January 01, 1970, 10:00:00 AM »

good thread goffa - very informative.

this thing is looking mean Cool
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Dazza98
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« Reply #16 on: January 01, 1970, 10:00:00 AM »

where did you get the carbon fiber from?
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Goffa
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Extreme Wildman on M1297W


« Reply #17 on: January 01, 1970, 10:00:00 AM »

Quote from: 18
where did you get the carbon fiber from?

I asked for it to be added to the initial wildman order.
I have 10 times more than I need for my build...
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Goffa
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Extreme Wildman on M1297W


« Reply #18 on: January 01, 1970, 10:00:00 AM »

Getting the hang of this fillet injection method now!
Very pleased with the interior fin fillets.
Gonna use the holes I drilled in the airframe to inject some more fillets.
This time onto the aft CR to make sure the CR-motortube and CR-airframe joints are nice and strong.

Now that the fins are on, the area between the aftCR, midCR, motortube and airframe is partitioned into 3 sealed sections.
Mixed epoxy and load with chopped CF.
Stood fin section upright and injected thru holes (inject 3 times, 1 for each sealed section).


epoxy/CF mixture settles down onto top of aftCR and forms a nice thick fillet across the motortube and airframe joints

Next I will tip the fin section upside down and do the same for the middle CR...
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Dazza98
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« Reply #19 on: January 01, 1970, 10:00:00 AM »

looking good goffa lots you are giving me lots of good ideas, thanks. i got some carbon fiber coming my self
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wolflair
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« Reply #20 on: January 01, 1970, 10:00:00 AM »

look out dazza is getting ideas lol
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Goffa
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Extreme Wildman on M1297W


« Reply #21 on: January 01, 1970, 10:00:00 AM »

Tipped Fin Section upside down.
Injected epoxy/CF mixture thru holes into the airframe-motortube cavity.
It flowed down sides and settled onto middle CR covering CR-motortube and CR-airframe joints.
Did this 3 times, once for each cavity section.


The translucent fibreglass and black CF makes it easy to see where your epoxy is inside the airframe

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« Reply #22 on: January 01, 1970, 10:00:00 AM »

Cool Top Work Goffa !!
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Goffa
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Extreme Wildman on M1297W


« Reply #23 on: January 01, 1970, 10:00:00 AM »

Lowering a cup of epoxy/CF mixture thru the top of the airframe and dumping onto the forward CR.
Paper towels on standby in case I spill some into the motor tube. gahhh!



So thats all the internal fillets done.



Next step: external fin fillets...
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Dogzilla
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« Reply #24 on: January 01, 1970, 10:00:00 AM »

Great work Goffa, i only wish i put that much love into my builds....

Will this rocket actually be able to withstand a flight directly onto the surface of the sun after this.

Looking forward to seeing the avionics bay setup. What sort of electronics you going to use?.

Any plans for a camera bay anywhere or just gaffa tape it on the side?
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Goffa
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Extreme Wildman on M1297W


« Reply #25 on: January 01, 1970, 10:00:00 AM »

Hey Dogzilla...might be too heavy with all this epoxy to even get off the pad!!

Dunno yet about the electronics.
Have one altimeter: a PerfectFlight MAWD
Have to get a 2nd...thinking about MAWD, Missleworks RRC2-mini or Raven.
Like to get a raven coz it got an accelerometer and I can use it for verifying mach flights...but they are out of stock.

Probably just strap a camera on with gaffa tape for lower power test flights.
Dont know much about camera bays...
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« Reply #26 on: January 01, 1970, 10:00:00 AM »

goffa i recently brought a mars4 this to has a accelrometer and many more features, might be worth looking at.
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Goffa
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« Reply #27 on: January 01, 1970, 10:00:00 AM »

Started work on the Avbay.
It'll be along the lines as described by Wolflair in other areas of the forum.

Here's the basic components.
12" coupler tube (CT).
Switch band (SwB) epoxied to middle of CT.
The SwB is just a 2" length of airframe tube. The booster tube and payload tube butt up against either end.
The SwB will be used to house the altimeter switches and port holes.
Stepped bulkheads (BH) at each end. These will house the eyebolt, allthread bolts, eject charge canister and ignition lead terminal blocks.
Sled to house altimeters. Launch lugs 1/4" will be epoxied to edges of the sled and will house the allthreads.
Delta quicklinks 3/16" for attaching the shock cords.


Here's a closeup of the SwB showing 1 of the 3 altimeter port holes.
You can also see 1 of the 3 rivet holes in the CT for fastening the avbay to the payload tube.
Switch holes not drilled in the SwB yet...haven't decided on what switches to use.


Here's a closeup of the stepped BH.
Allthread holes not drilled yet.
Its made of an airframe BH and a coupler BH epoxied together.
The idea is that the allthread bolts pull the BH's up against the CT to make a nice seal to protect  the avbay electronics from any eject charges


Here is one of the "closed" eyebolts I bought. It just seems to be a normal open eyebolt with a dab of weld on it.
I've got nice big washers on each side to spread the load across the BH.
I suppose it will be strong enough(?)
I guess other options are a "proper" forged eyebolt or a Ubolt.
I wonder what is the "weakest link in the recovery chain": shock cord, quicklink, eyebolt, BH, CT, rivets?

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