Search found 33 matches

by Grignacke
Tue Mar 08, 2011 10:00 pm
Forum: Combustion Cannons
Topic: Metal Chamber and Ignition
Replies: 8
Views: 2341

So epoxy can, Moon, can withstand hybrid-level pressures, and an additional set of holes wouldn't weaken the chamber too much? (The cobras seem fine :P )

I may consider a similar, albeit less equipment requiring method, motor...
by Grignacke
Mon Mar 07, 2011 11:20 pm
Forum: Combustion Cannons
Topic: Metal Chamber and Ignition
Replies: 8
Views: 2341

Metal Chamber and Ignition

Hey guys, have you all ever had problems with steel chambers and high voltage ignition sources? What sort of insulation do you use?
by Grignacke
Wed Dec 22, 2010 9:23 pm
Forum: Hybrid Cannons
Topic: Chamber Lengths
Replies: 3
Views: 1311

Gotcha. Thanks!
by Grignacke
Wed Dec 22, 2010 9:00 pm
Forum: Hybrid Cannons
Topic: Chamber Lengths
Replies: 3
Views: 1311

Chamber Lengths

Hey guys, I currently have a 2' , 2" chamber with additional reducing couplings on the sides (to fuel, and to barrel). I've noticed this is a pretty long and thin barrel, which the wiki said is conducive to DDT. Would you all recommend I shorten the chamber? I mean I could get more reducing coupling...
by Grignacke
Sat Dec 11, 2010 1:52 pm
Forum: Combustion Cannons
Topic: Help with ignition source
Replies: 14
Views: 3535

If you're savvy with electronics, you can get a CRT TV and get the transformer they use to supply high voltage (the flyback), hook it up with a more or less easy to build circuit (555 timer or 2N3055, but the latter generally fails) and give yourself some pretty high voltage. It's harder to make but...
by Grignacke
Wed Dec 08, 2010 9:42 pm
Forum: Combustion Cannons
Topic: Help with fueling setup
Replies: 36
Views: 8460

It takes a special kind of stupid to research the topic and leave thinking that air/propane at 1X might rupture SCH40 steel. That's the funniest thing I've heard in awhile :D Otherwise, the problem you seem to have (as others have indicated) is too long of a chamber and improper mixing. Give it som...
by Grignacke
Sun Dec 05, 2010 8:25 pm
Forum: Off-Topic Hobbies
Topic: What are you hoping Santa brings you this year?
Replies: 33
Views: 8771

I wouldn't mind some old CRTS :D
by Grignacke
Sun Dec 05, 2010 8:24 pm
Forum: Combustion Cannons
Topic: Stun Gun
Replies: 6
Views: 2139

Yeah, I guessed that much. What I'll probably do is keep the stungun close to the chamber and connect to the inside with wire / electrodes leading to the a spark strip, (made with PCB? maybe an insulated coathanger) and have a long range switch for the actual stun gun. But of course the stun gun won...
by Grignacke
Sun Dec 05, 2010 3:45 pm
Forum: Combustion Cannons
Topic: Stun Gun
Replies: 6
Views: 2139

Stun Gun

Hey-o. I bought a stun gun the other day and the clerk would only sell me one that was charged (basically plug in the wall). How should I dismantle it without shocking myself? Also, how well do stun guns work at handling high pressure chambers, such as in a hybrid?
by Grignacke
Mon Nov 29, 2010 6:39 am
Forum: Combustion Cannons
Topic: Which ignition sytem do you like the best and why?
Replies: 30
Views: 8049

Since I'm still a flyback noobie I went with a 555 for my first one :3
But of course ZVS is the best. That's a bridge design, is it not?
by Grignacke
Sun Nov 28, 2010 9:37 pm
Forum: Combustion Cannons
Topic: Which ignition sytem do you like the best and why?
Replies: 30
Views: 8049

I've always been a fan of flyback ignition myself. It adds another dimension to the gun, making the driver... I'm using it on a hybrid I'm building :D
by Grignacke
Thu Nov 11, 2010 6:30 am
Forum: Hybrid Cannons
Topic: Hybrid Ball Valves
Replies: 8
Views: 2255

For the record, I do have an opensuse machine that only boots in safe mode... Muhahaha
by Grignacke
Wed Nov 10, 2010 9:34 pm
Forum: Hybrid Cannons
Topic: Hybrid Ball Valves
Replies: 8
Views: 2255

Is there a HGDT for mac? I checked it out awhile ago and it said he had not porting to mac D:
by Grignacke
Wed Nov 10, 2010 8:34 pm
Forum: Hybrid Cannons
Topic: Hybrid Ball Valves
Replies: 8
Views: 2255

Hybrid Ball Valves

Hey guys. I'm building a hybrid, plan to take it up to 10X - 15X, and I have the fueling system inline with the chamber, as with other cannons I've seen in the showcase. Thing is, will a ball valve between chamber and fueling system have to be steam rated, or will a rating for inert gases suffice? I...
by Grignacke
Sat Oct 23, 2010 4:19 pm
Forum: General How-To & Discussion
Topic: Steel fittings from mc master
Replies: 4
Views: 1283

Steel, I presume. I'm fairly confident that I'll be good, considering I don't plan going past 15x, using Sch. 40 steel...
Thanks guys! :D