HW35 The Collectable Weihrauch

[T 20]

Yes T20 I remember reading in AGW an article on Venom that Pope and Handcock met tru an airgun club and both had been tuning 35's, pooled their resources and formed Venom.

Out of interest what are the diffences in stroke between a 35 and 80.

The HW35 with leather washer had a 65mm stroke.
The maximum available stroke length in a standard HW35 is 71mm
The HW80 had a stroke of 83mm.
Some of the early 80's imported were found to be producing 16to17ftlb's as standard.

Looking at those figures it's just occured to me that you get about 1 ftlb for every 5mm of stroke.

The HW80 was mainly intended for the American market were there are no restrictions on power. The HW80 came about due to the collaberation between Dr Robert Beeman and Weihrauch, as did the HW45 pistol.

The earliest reference to Hancock and Pope that I have is a photograph of them from an old Airgunworld, out on a shooting trip with Jim Tyler (BTDT).


All the best Mick

[I. J.]

, out on a shooting trip with Jim Tyler (BTDT).

'With' Jim Tyler or 'after' Jim Tyler - Woaded One shooting.

Thanks for the info on strokes Mick. Very informative for future reference.

ATB
Ian

[T 20]

'With' Jim Tyler or 'after' Jim Tyler - Woaded One shooting.

Thanks for the info on strokes Mick. Very informative for future reference.

ATB
Ian

Hi Ian

The thought of trying to hunt down Jim Tyler has conjured up memories in my head of when the Goodies tried to capture Rolf Harris.

Of course it would be highly unsporting to try stalk Jim now as like many of us old boys in the collectable section the smell of Ralgex and the slight wiff of stale waz would give his position away.

Glad you liked the stroke length info.

It may be that the stroke length of the nylon headed piston in the HW35 is shorter than the Leather sealed one.

Now all I have to work out is why the HW77 with a lower swept volume than the HW35 is capable of 18 ftlbs.

All the best Mick

[Muskett]

While we have some tune experts on here, and many people might tune up their 35's and end up the wrong side of the ft/lbs law. How best to restrain the stroke length and fine tune the power after a good polish and tar tune up? Does it need some real engineering or is there a really easy DIY way?

[T 20]

Hi Muskett
Take it from me I'm no tuning expert but I'll tell you what I know.
The stroke length on a 35 is fixed, unless you machine the piston at both ends.

To get 15ftlbs from a 35 involves machining a different piston head altering the piston as above and machining up a top hat piston weight and honing the cylinder out to be perfectly true. As you can see this situation isn't going to occure during a normal tune up.

During a normal strip and tune I would take Jim Tyler's article in the February issue of Airgunworld as your guide as he give good advice on how to stay legal.

The only special lubricant I buy is Silicon oil for the piston head, for spring grease I have been using JCB hammer grease (I kid you not) for years, it's a very thick Molly grease and it tends to stay where you put it.

I have sent you an article by John Bowkett via e mail Muskett, I hope you find it interesting, the work he did on the HW77 is usable in tuning the 35.

All the best Mick

[coburn]

According to Parcel Force my latest 35 is sitting at their Mitcham Depot for delivery today can't wait. (given my luck its still bound to go missing)

Anyway 77's giving 18ftlbs with a smaller swept volume than the 35.

I know they have a smaller diameter cylinder, 25mm? but when I stripped one years ago the bloody spring was about a mile long, could its secret be in the spring pre load. Beeman also claims that along with the 80 the 77 was his creation but mentions disapointment that it never caught on in the States like the R1/80. As an interesting fact the R1 was developed first, HW agreed to market their own version the 80. However Beeman had decided on a longer more rounded stock for the R1. This held up production because the blanks necessary were not immediately available. This allowed HW to have the 80 on the market before Beeman had the R1 out.

[Muskett]

T20
Might have to find a copy of Airgun World; good excuse as I only buy one once a year.

Wow; the John Bowkett article is major engineering. Many thanks for sending it to me. Very interesting, and for those who don't have a copy you really need some serious engineering equipment and know how to do the work.

In truth other than a strip, clean, de-burr and tar and moly thats about me. However, I think a fully worked HW77 might be in the offing as it would have the nostalgia and accuracy that I want. Something for me to think about.