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by joeman
Thu Jun 13, 2019 2:37 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Re: Building a CF Tube

Thanks Drew!! Thanks for coming and saying hi at Thunda [emoji3] Yes, I remember using parallel port for some other project 20+ years ago!! Here I go again. Regarding # of layers of CF, I’ve got some Finite Element analysis software... trying to ascertain the best configuration... angles and # of la...
by joeman
Thu May 30, 2019 4:40 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Re: Building a CF Tube

Hi,
I'm using West Systems, though I'm considering using Renlam K3600 because it is less viscous.

The West Systems epoxy really hugs on to the roller and the CF tow, even with the doctor blade and high tension rubber band.

Cheers!

Joe
by joeman
Thu May 30, 2019 1:47 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Re: Building a CF Tube

Hi I’ve managed to make my first multi layered tube. 30,45,30 degree. Carbon fiber laid perfectly. This is a massive step forward from previous winding. https://uploads.tapatalk-cdn.com/20190530/e707b2496e042b970bfc5e8cc246c52a.jpg Look carefully and you can see the distinctive pattern. Did a test f...
by joeman
Wed May 08, 2019 12:25 pm
Forum: Scratch Built
Topic: Twin Booster Rocket (D or E motor)
Replies: 11
Views: 733

Re: Twin Booster Rocket (D or E motor)

Hi, Looks good! I've been madly 3-D printing (for my own project) and one of my requirements was to have the parts sanded to almost a polish finish. I assume you would like to get a nice smooth finish for the visible components (exterior surfaces)? If so, I've shared my experiences below might help....
by joeman
Tue May 07, 2019 10:12 am
Forum: Scratch Built
Topic: Twin Booster Rocket (D or E motor)
Replies: 11
Views: 733

Re: Twin Booster Rocket (D or E motor)

Looks really good! I really like the sketches.

Looking forward to see how this progresses.

Joe
by joeman
Tue May 07, 2019 7:17 am
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Re: Building a CF Tube

Cheers! Need about 5 N of tension. i.e. not too much. Aiming ideally for 50/50 by weight. (CF vs Epoxy) If tension is too great, I find that when CF changes direction I can have issues with it not staying put on Mandrel. I'll probably use some Peel Ply I have here to help squeeze out excessive Epoxy...
by joeman
Sun May 05, 2019 6:27 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Re: Building a CF Tube

Did a FULL layer today - dry run at 45 degrees without any issues. Here is a photo of how it looked at the end of winding. IMG_8543_SML.jpg The Carbon Fiber makes very nice looking patterns. VERY happy with how it looks. Hope to do a real-run with Epoxy sometime in the next week or so - three layers...
by joeman
Fri May 03, 2019 11:03 pm
Forum: How to's
Topic: Building a CF Tube
Replies: 10
Views: 859

Building a CF Tube

Hi, Thought I'd create a post of my latest project - which is a Carbon Filament winding machine (as opposed to wrapping CF fabric around a mandrel). Ultimately, I hope to use this winder to make myself some Carbon Fiber tubes for various rocketry projects into the future, including my L3 build which...
by joeman
Fri May 03, 2019 9:46 pm
Forum: Thunda Down Under 2019
Topic: Thunda Down Under 2019 Photo and Video Thread
Replies: 34
Views: 2001

Re: Thunda Down Under 2019 Photo and Video Thread

Here is a photo (screen-grab) of close up of BumbleBee going up. BumbleBee_sml.png Video of the flight (from this camera) is here if people wish to see. https://youtu.be/w8AdTKqLEfU There is a camera on board - I made sure the camera was pointing towards the tents. If found, should be some nice foot...
by joeman
Mon Apr 22, 2019 10:34 am
Forum: Thunda Down Under 2019
Topic: Lost rockets page
Replies: 2
Views: 214

Lost rockets page

Thanks to everyone for organising this amazing event. Thanks to Funny Farm too. So very awesome! Got an image of my lost rocket below. https://uploads.tapatalk-cdn.com/20190422/a27eca276052f7d6ec498cbaa4384f5a.jpg It has 24” parachute. Hopefully it turns up some day. If anyone does find it, please m...
by joeman
Sat Feb 02, 2019 10:01 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 96
Views: 31900

Re: Joe Turner's 38mm Scratch-Build

Hi, I've been extremely time poor, so I've been very slow at getting into the post flight analysis. Managed to manually "fuse" the altimeter data with the GPS data to get an approximate plot of the flight. Flight_Path_sml.png The plot looks on the face of it to accurately represent the fli...
by joeman
Thu Jan 24, 2019 8:24 am
Forum: Mid/High Powered Rocketry
Topic: Nike Apache Half-Scale Project
Replies: 113
Views: 22389

Re: Nike Apache Half-Scale Project

Sounds great what you are doing.

All the many little tasks at the end take up so much time.

Hope to see you there. I'd love to see it before it flies!
by joeman
Tue Jan 22, 2019 10:11 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 96
Views: 31900

Re: Joe Turner's 38mm Scratch-Build

Thanks SpaceManMat. Sorry for the delay. Finally back home and have the rocket and a little bit of time. Firstly, here are better quality photos IMG_7387_sml.JPG IMG_7385_sml.JPG The way I folded it was using the alternative 6,7 step at the end + Z-Folds. The fact that the Z-Fold still shows makes m...
by joeman
Thu Jan 17, 2019 4:23 pm
Forum: Scratch Built
Topic: Joe Turner's 38mm Scratch-Build
Replies: 96
Views: 31900

Re: Joe Turner's 38mm Scratch-Build

Re parachute not inflating Main charge fired at 800ft (and it did fire okay) I followed:- https://topflightrecoveryllc.homestead.com/Folding.html And then I did fold over length wise to reduce total length... so yes I did add that step..... to reduce the total length. I think if it was ejected witho...
by joeman
Thu Jan 17, 2019 4:14 pm
Forum: Queensland Rocketry Society
Topic: 13th January 2019 Launch
Replies: 14
Views: 774

Re: 13th January 2019 Launch

Yes. It was a bit disappointing.

I’ll post response in 38mm build thread


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