Logo
Builders' Plan Gallery  |  Hip Pocket Web Site  |  Contact Forum Admin (Account/Technical Issues)  |  Contact Global Moderator
December 05, 2020, 07:52:39 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with email, password and session length
 
Home Help Search Login Register
Pages: [1]   Go Down
Print
Author Topic: Co2 systems  (Read 706 times)
0 Members and 1 Guest are viewing this topic.
FokkerD8
Copper Member
**

Kudos: 0
Offline Offline

United Kingdom United Kingdom

Posts: 8


Topic starter


Ignore
« on: June 09, 2020, 12:24:45 PM »

I’ve set about making a small co2 motor (having seen some at K2 in Crawley in February). I’ve had some advice from this forum. Now I have struggled with making supply valves from sodastream and threaded sparklets bulbs but have got these working at last.
The input tank valve works fine.
The motor is 3cm high with a bore of 4mm.
I’m having difficulty in making the “head” valve to work without a small leakage. I’m using nylon (acetal) rod and 1mm or 1.5mm steel balls. Any advice here is welcome.
I’m happy experimenting with metal (brass)  piston (using an O ring seal).
I’d really like to see some good drawings and or descriptions of the overall system.
What’s the exact size (diameter)  of filling tube and details of end.
When filling the tank some gas/liquid co2 spills out, this doesn’t seem good but is inevitable, it seems.
When I’ve got a consistent running motor I intend to make a much smaller version for a pistachio model.
Logged
raggedflyer
Silver Member
****

Kudos: 3
Offline Offline

United Kingdom United Kingdom

Posts: 104



Ignore
« Reply #1 on: June 09, 2020, 02:56:50 PM »

Are you able to send me a drawing of the head inlet valve for comment please?
Logged
FokkerD8
Copper Member
**

Kudos: 0
Offline Offline

United Kingdom United Kingdom

Posts: 8


Topic starter


Ignore
« Reply #2 on: June 10, 2020, 04:19:58 AM »

Hello Raggedflyer,
Photo of drawing and bits. I have tried to use very sharp drills. Should the 1.75 hole have a square bottom?

I’m still trying to work out how to get the best of this forum. So excuse me if I’m missing something. The seal on the head can’t be too bad as I came down this morning and there was still some pressure left. My results have been inconsistent though. I’m waiting for more O rings for piston as the ones I’m using are too soft.

Thanks for you response,

Martin
Attached files Thumbnail(s):
Re: Co2 systems
Logged
raggedflyer
Silver Member
****

Kudos: 3
Offline Offline

United Kingdom United Kingdom

Posts: 104



Ignore
« Reply #3 on: June 10, 2020, 05:35:44 AM »

FokkerD8 send you an email later
Logged
FokkerD8
Copper Member
**

Kudos: 0
Offline Offline

United Kingdom United Kingdom

Posts: 8


Topic starter


Ignore
« Reply #4 on: June 11, 2020, 09:26:11 AM »

Raggedflyer, are you waiting for me to supply email address? How is that done safely?
Martin
Logged
raggedflyer
Silver Member
****

Kudos: 3
Offline Offline

United Kingdom United Kingdom

Posts: 104



Ignore
« Reply #5 on: June 11, 2020, 03:19:59 PM »

Sent you a pm
Logged
GM
Bronze Member
***

Kudos: 2
Offline Offline

United Kingdom United Kingdom

Posts: 72



Ignore
« Reply #6 on: September 20, 2020, 07:41:29 AM »

Hi.

It is possible that I'm one of the people that you saw fly co2 models At Crawley this year.

Have you managed to resolve your valve sealing issues?

Logged
RalphS
Gold Member
*****

Kudos: 25
Offline Offline

United Kingdom United Kingdom

Posts: 950



Ignore
« Reply #7 on: September 20, 2020, 09:50:42 AM »


I’ve set about making a small co2 motor


Something that I have thought about. A father and son flew homemade CO2 motors at Manchester velodrome a couple of years ago.  I meant to talk to them to glean a bit more information.  (If we have another lockdown I will need something to do)

I would be interested in a few pictures/drawings, etc.
Logged
RalphS
Gold Member
*****

Kudos: 25
Offline Offline

United Kingdom United Kingdom

Posts: 950



Ignore
« Reply #8 on: September 20, 2020, 09:52:47 AM »

Forgot to add this.

There are gas powered gun chargers and valves available.  I was going to have a look at those but haven't got around to it yet.
Logged
raggedflyer
Silver Member
****

Kudos: 3
Offline Offline

United Kingdom United Kingdom

Posts: 104



Ignore
« Reply #9 on: September 21, 2020, 07:46:07 AM »

Also saw CO2 inflation systems for serious pedal cyclists being promoted in the last few days which looked to be well engineered. Might be worth some further investigation.
Logged
Pages: [1]   Go Up
Print
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!