Search found 447 matches

by ogivemeahome
Wed May 27, 2020 8:06 pm
Forum: Scratch Built
Topic: Countersinking radial holes
Replies: 4
Views: 385

Re: Countersinking radial holes

If memory serves, (it's been a while) the "single angled hole" type c'sink tool works well if the job is not clamped - use low speed and watch it all orbit the table - not so good for accuracy. On aluminium especially, you need a sharp edge (freshly sharpened on a machine - hand sharpening...
by ogivemeahome
Tue Mar 31, 2020 7:52 pm
Forum: Scratch Built
Topic: Model Rocket Survey
Replies: 7
Views: 735

Re: Model Rocket Survey

Done. ;)
by ogivemeahome
Wed May 08, 2019 7:03 am
Forum: Kids Korner
Topic: Full scale Saturn V build.......in Minecraft
Replies: 2
Views: 2507

Re: Full scale Saturn V build.......in Minecraft

Very cool. But can you build it in survival mode?! (Swatting zombies as you go.) :)
by ogivemeahome
Sat May 19, 2018 8:07 am
Forum: Support & Recovery & Misc.
Topic: Shroud Line-less Parachute
Replies: 8
Views: 2662

Re: Shroud Line-less Parachute

snrkl wrote: ... tensile strength of the nylon mesh ...
Sent from my iPhone using Tapatalk Pro


You could reinforce the mesh. Tangle free 'chuting! :)
by ogivemeahome
Sat Feb 03, 2018 9:21 am
Forum: I could use that
Topic: Rotary Tool on Special at Hobby King
Replies: 5
Views: 2813

Re: Rotary Tool on Special at Hobby King

Had something similar a long time ago that died. The problem was the speed control. When you dialled down the speed, you also dialled down the power. Using a larger diam. cutter requires a lower speed but MORE power. You'd find the wheel would stall frequently (probably making the motor overheat and...
by ogivemeahome
Sat Jan 06, 2018 1:13 pm
Forum: I could use that
Topic: Anyone bought from "Small Parts and Bearings" in QLD before?
Replies: 3
Views: 2448

Re: Anyone bought from "Small Parts and Bearings" in QLD before?

Have bought from them a few times - sometimes a long wait is involved. One article still hadn't arrived after months so I cancelled the order and was given a refund. I'd buy from them again.
by ogivemeahome
Sat Jan 06, 2018 1:10 pm
Forum: I could use that
Topic: Rotary Tool on Special at Hobby King
Replies: 5
Views: 2813

Re: Rotary Tool on Special at Hobby King

Got one. (The postage was the same price as the article + had to change the plug so the real price is more like $40.)
Had it running - it works - but haven't done any cutting yet.
by ogivemeahome
Wed Oct 19, 2016 6:28 am
Forum: Scratch Built
Topic: "Buckshot". Seven cluster rocket!
Replies: 28
Views: 6896

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: 6502

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: 3387

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: 4610

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: 3846

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: 1792

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: 4610

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...

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