Search found 439 matches

by ogivemeahome
Wed Oct 19, 2016 6:28 am
Forum: Scratch Built
Topic: "Buckshot". Seven cluster rocket!
Replies: 28
Views: 1243

Re: "Buckshot". Seven cluster rocket!

jhurst7 wrote:For the lead in the nose cone, where did you get the lead from and what was the density of that lead?

You can use fishing gear ("sinkers"). They can be hammered flat like a pancake if you're short on space.
Density of lead is 11325 kg/m^3
Encapsulate the lead if you can.
by ogivemeahome
Sat Sep 17, 2016 5:33 pm
Forum: Scratch Built
Topic: Gammatron - BT80, 29mm MMT
Replies: 19
Views: 2363

Re: Gammatron - BT80, 29mm MMT

Oh to have a CNC router! I could machine a cavity; put some expanding foam in it, lay it over the fin/aft transition, wait for the foam to form a fillet in-situ, take the cavity away, glass over the fillet. Something for future builds maybe. How about 3D printing a former instead? OK, so I've alrea...
by ogivemeahome
Mon Sep 12, 2016 4:50 pm
Forum: Electronics
Topic: Air Pressure Sensor
Replies: 8
Views: 558

Re: Air Pressure Sensor

I'm a little concerned with potential weakening of the air-frame if I drill a hole in it; Though on reflection, I guess I could drill a small hole and put a little bit of glue around it to provide some additional strength. When you're drilling the holes, put something solid underneath the hole to d...
by ogivemeahome
Sun Aug 14, 2016 7:54 am
Forum: Low Powered Rocketry
Topic: Ejection Gas Collection Recovery System
Replies: 14
Views: 1042

Re: Ejection Gas Collection Recovery System

Jordz wrote:But, at least now i know it wont work haha.

Thomas Edison successfully tested 99 ways how not to make a light bulb. ;)
by ogivemeahome
Sun Jul 31, 2016 9:02 am
Forum: Low Powered Rocketry
Topic: LPR Rocket Launch Rods
Replies: 8
Views: 628

Re: LPR Rocket Launch Rods

"Piano wire" is an option but needs to be cleaned and silicon sprayed regularly to prevent corrosion.
I've heard the suggestion of using rifle barrel cleaning rods (compact - they screw together) - haven't tried it though.
by ogivemeahome
Sun Jul 31, 2016 8:50 am
Forum: Rocketry Control Room
Topic: Space Industry & Sustainability for The long Future
Replies: 7
Views: 642

Re: Space Industry & Sustainability for The long Future

SpaceManMat wrote:Not entirely sure what the study actually is.

The amount of junk up there is becoming a serious problem. Perhaps it has something to do with tracking/eliminating the larger chunks?
by ogivemeahome
Sat Jul 16, 2016 8:28 am
Forum: Low Powered Rocketry
Topic: Ejection Gas Collection Recovery System
Replies: 14
Views: 1042

Re: Ejection Gas Collection Recovery System

When you compare 'chute to balloon; - the 'chute only has to be in the airflow to 'inflate' - a balloon wants to be smaller, thus the air in it will be compressed, thus there'll need to be more air - you may need something like a 'fly apart airframe' for the balloon to be released reliably? My think...
by ogivemeahome
Tue Jun 21, 2016 8:38 pm
Forum: How to's
Topic: Attaching shock cord to hollow nose cone
Replies: 7
Views: 539

Re: Attaching shock cord to hollow nose cone

Carve a balsa plug that will fit snugly, 'key' the inside of the nose cone by scratching with a blade/course sandpaper on a stick, epoxy the plug in place, drill a hole through the nose cone/plug (sideways), insert a pin of some description (balsa, carbon fibre, hardwood dowel), fill and sand any ir...
by ogivemeahome
Sat Jun 18, 2016 6:41 pm
Forum: How to's
Topic: Canted nose cones
Replies: 8
Views: 573

Re: Canted nose cones

OverTheTop wrote:Are you concerned with the strength of the part?

Just trying to be funny.
I have a 3D printed nose cone coated with epoxy (and talc - to make the sanding easier).
Yet to do a field test with it but I'm confident.
by ogivemeahome
Thu Jun 09, 2016 8:59 pm
Forum: How to's
Topic: Canted nose cones
Replies: 8
Views: 573

Re: Canted nose cones

natty wrote:... making canted nose cones.
Has anyone got any ideas?


3D printing. Cover the print with f/g. What could go wrong? :?
by ogivemeahome
Mon May 30, 2016 9:05 pm
Forum: Scratch Built
Topic: Upscale "Tintin's Moon Rocket" - WWW2016
Replies: 48
Views: 2659

Re: Upscale "Tintin's Moon Rocket" - WWW2016

I still have a vivid memory of seeing the first Tin Tin rocket go up at a QRS launch. Awesome.
Please post video of the big brother version. :)
by ogivemeahome
Mon Apr 25, 2016 6:01 pm
Forum: Mid/High Powered Rocketry
Topic: PML Quicksilver - L1 build
Replies: 54
Views: 2790

Re: PML Quicksilver - L1 build

... it keeps running a bit in areas where it's not pressed in between two surfaces (centering ring fillets for example. I've found mixing it then letting it sit for 5 minutes to gel slightly helped... You could try pre-warming the epoxy - hot water from the tap @ 50deg C. After mixing, a minute or ...
by ogivemeahome
Mon Apr 11, 2016 6:14 pm
Forum: Scratch Built
Topic: My second build.
Replies: 39
Views: 1561

Re: My second build.

... had them all aligned whilst gluing them ... If you're using PVA, it tends to shrink as it dries. All it takes is slightly more adhesive on one fillet or different drying rates. Epoxy is your best bet here as there is minimal (if any) shrinkage. I used superglue to coat some fins a while ago (be...
by ogivemeahome
Tue Mar 29, 2016 6:44 pm
Forum: How to's
Topic: Multistaging
Replies: 13
Views: 626

Re: Multistaging

Can anyone help me with OR, I've designed my rocket and am trying to workout how to see booster stage decent. i.e. it actually tumbles instead of becoming a lawn dart. Cheers. I did this (probably the hard way) by doing a "save as" and deleting all but the booster from the design. Instead...

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