HW77 .177 transfer port size

[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