HW77 .177 transfer port size

[Hsing-ee]

Wow there Tony

I don't profess to be an expert tuner, and never have done --- I'm at best a well established bodge artist.




All the best Mick

Anyone who can get 12 ft/lbs out of a B2 without sticking a .22 Short cartridge in it has to have some skill.

[T 20]

Anyone who can get 12 ft/lbs out of a B2 without sticking a .22 Short cartridge in it has to have some skill.

Hi Alistair

The big thing I found out with that exercise was that you could increase the power output of certain guns by reducing the transfer port diameter.

The other classic example of this is the Webley Hawk MK2 --- sleeve the transfer port down and watch the power go up and the recoil come down.

U.K.Neil, kindly gave me a Webley MK3 at the Boinger Bash --- this is next on the list for a reduced transfer port.





All the best Mick

[Hsing-ee]

Hi Alistair

The big thing I found out with that exercise was that you could increase the power output of certain guns by reducing the transfer port diameter.

The other classic example of this is the Webley Hawk MK2 --- sleeve the transfer port down and watch the power go up and the recoil come down.

U.K.Neil gave me a Webley MK3 at the Boinger Bash --- this is next on the list for a reduced transfer port.





All the best Mick

Exactly. In the 80s I remember the legions of tuners boring the TPs out and sticking in massive springs and polishing the bejesus out of everything to little practical effect ... even Webley up-gunning the Hawk to give the Vulcan with a stronger spring, 'advanced' piston washer 'system' and bogger swept volume ... when all they needed to do was sleeve the TP down. The difference between you and them is you did your thinking with your brain, Mr Mick!

[T 20]

Exactly. In the 80s I remember the legions of tuners boring the TPs out and sticking in massive springs and polishing the bejesus out of everything to little practical effect ... even Webley up-gunning the Hawk to give the Vulcan with a stronger spring, 'advanced' piston washer 'system' and bogger swept volume ... when all they needed to do was sleeve the TP down. The difference between you and them is you did your thinking with your brain, Mr Mick!

I think Webley may have cottoned on at that time Alistair.

The transfer port on the Hawk was 4mm diameter X 16mm long

The transfer port on the Vulcan was 2.5mm X 19mm long





Al the best Mick

[TonyL]

Hi Alistair

The big thing I found out with that exercise was that you could increase the power output of certain guns by reducing the transfer port diameter.

The other classic example of this is the Webley Hawk MK2 --- sleeve the transfer port down and watch the power go up and the recoil come down.

All the best Mick

There are many reasons why I have never attempted going down the road of "wholesale" and "structural" changes:-

What you've stated up above is something that's always been at the back of my mind.

Lack of bottle is one of the big reasons. My guns are all special to me and I'd hate to think I'd ruined it by going too far......Obtaining some near-to-worthless wrecks would certainly help in this regard!
I'm also hampered by a chronic lack of time and don't have the workshop facilities. If I had the time, bottle and gear, and could obtain enough basketcases, I'd LOVE to be able to delve a little deeper than my usual de-burr, polish, replace seals and fit guides etc.

So, to date, I've been happy with just making what's there just a little nicer.

Yes, I'd love to be able to play with sleeving down the bore and altering stroke etc. And, yes, I realise that, with the right gear, if you go to far with the TP diameter, this can be rectified.

But, sticking to the standard dimensions will do me for now, but I'll always feel very grateful and indebted to peeps like you, Mick. And Bigtoe and Wonky. There are more out there, too. Intrepid tuners who are happy to share their knowledge with us.

Cheers guys!

[TonyL]

Anyone who can get 12 ft/lbs out of a B2 without sticking a .22 Short cartridge in it has to have some skill.

And the HW35/LGV hybrid, eh, Mick?

Yep, what a bodge that was!