Theoben Rapid Forum

Everything Technical About Rapid => Technical => Topic started by: Paul Armstrong on February 08, 2024, 05:44:18 PM

Title: Plenum
Post by: Paul Armstrong on February 08, 2024, 05:44:18 PM
Has anybody else , apart from me put a plenum underneath the block like where the dowty washer goes. I did this years ago and it made my non regulated gun pretty darn consistent
Title: Re: Plenum
Post by: P barrett on March 24, 2024, 11:28:29 AM
Hi Paul I've had a quick fill in the same place for the last fifteen years.my plenum is behind the valve above the reg I've not got a quick fill now, it's got all nicks bits in . ATB jazz 😁
Title: Re: Plenum
Post by: Ca_Varminter on March 24, 2024, 02:53:21 PM
Long, Long time ago....on the other side of the Pond
On the AirgunAdvice.net forum.
Our in-house Rapid Tuner..Swift
He made an Experimental Rapid Mod.... .50cal!!
He needed More Pre-chamber(Plenum) space,
So He made up an elbow and small tube that attached to the rapid where the blanking plug is located..

Stuart
Title: Re: Plenum
Post by: KevG on March 24, 2024, 07:26:40 PM
Quote from: Ca_Varminter on March 24, 2024, 02:53:21 PMLong, Long time ago....on the other side of the Pond
On the AirgunAdvice.net forum.
Our in-house Rapid Tuner..Swift
He made an Experimental Rapid Mod.... .50cal!!
He needed More Pre-chamber(Plenum) space,
So He made up an elbow and small tube that attached to the rapid where the blanking plug is located..

Stuart
yes remember seing that,it was fairly large to.
kevG
Title: Re: Plenum
Post by: Ca_Varminter on March 24, 2024, 07:36:17 PM
Quote from: KevG on March 24, 2024, 07:26:40 PMyes remember seing that,it was fairly large to.
kevG
Yes it was....
He was getting about 250+ fpe out of that .50cal!!!!!!
 8)  8)  8)  8)  8)  8)  8)

Stuart
Title: Re: Plenum
Post by: KevG on March 24, 2024, 10:08:21 PM
it's what we call an iron lung.
kevG
Title: Re: Plenum
Post by: etiam viviens on March 26, 2024, 10:06:10 AM
What kind of barrel did they use.
(16-12.7)/2= 1,6 mm   that would very thin walls in the action block.

Does someone have a picture of this monster
Title: Re: Plenum
Post by: Ca_Varminter on March 26, 2024, 04:29:35 PM
It was Soooo Long ago.....
All the photos were lost when the Photobucket stabbed their users...
They started to charge for their hosting service... but If you want them back they would charge you again!!!
So no photo on this....

But if my fading Memory of this project... Swift Bored out the Receiver!!
To give a little meat to the barrel extension!!

Stuart
Title: Re: Plenum
Post by: P barrett on March 30, 2024, 11:55:37 AM
Hi Stuart I used to enjoy looking at what swift used to make,it's a shame the forum went down ,I think I still have one of swifts valves in my bits box .I used it on my mk 1 fac rapid.ATB jazz 😁
Title: Re: Plenum
Post by: Ca_Varminter on March 30, 2024, 02:39:37 PM
The old AirgunAdvice was a Very Fun PLace..
We had many builders, modders and a few very talented Machinist!!!
But in the end.... the Economy is what shutdown the site!!!
It was during the Mortgage Crisis, everyone sold their Airguns...
The Activity of our site dove off a Cliff!!

Swift was a friend too...
He lived up the hill from about 2 hours away.
He setup Shroud on my Titanium Rapid!!
I lost touch with him a few years ago......
(https://photos.imageevent.com/scl_electronics/misc/mages/websize/myshirt1.jpg)

Stuart