Let's Build an Airgun

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Re: Let's Build an Airgun

Postby Tank » Wed Jan 01, 2014 11:21 am

So - I have found plans - I think we should go with the Colt Double action Revolver format:

http://www.john-tom.com/ForSale/ForSale.html


:mrgreen:
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Re: Let's Build an Airgun

Postby zooma » Wed Jan 01, 2014 11:37 am

Nice idea Graham - but even with a fair bit of creative latitude I can't see how we can use one of those in the MPL postal series !

........I suppose it does have a spring in the trigger so maybe if we look at it with a large pair of rose tinted glasses we may possibly have a starting point to see how it can be adapted to propel a .177 pellet :think:
Feinwerkbau P40 Tricolour wanted.........still !
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Re: Let's Build an Airgun

Postby savantguarde » Fri Jan 03, 2014 10:33 am

Wouldnt a single stroke Pneumatic be simpler? I do enjoy my daisy 717's (Although they will soon be getting sold) and they are super super simple. You could even use something like the daisy valve / barrel as a basis and build up a pistol from that? 18 dollars for a barrel / valve assembly or even the lothar walther barrel / valve from the 747 (45 dollars) .
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Re: Let's Build an Airgun

Postby pmh » Fri Jan 03, 2014 11:44 am

It certainly would be simpler and cheaper, and CO2 is looking an even better option at the moment.

Preliminary sketches have been made, and we need to start mocking up some parts to get the exact size.

There is also some legal research required to ensure that it is in order for individuals to build an airgun.

Kind regards,



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Re: Let's Build an Airgun

Postby pmh » Fri Jan 03, 2014 11:45 am

It certainly would be simpler and cheaper, and CO2 is looking an even better option at the moment.

Preliminary sketches have been made, and we need to start mocking up some parts to get the exact size.

There is also some legal research required to ensure that it is in order for individuals to build an airgun, and more so as we anticipate selling a few to cover costs .

Kind regards,



Phil
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>>North Manchester Target Club<<
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Re: Let's Build an Airgun

Postby Adam77K » Fri Jan 03, 2014 1:27 pm

savantguarde wrote:Wouldnt a single stroke Pneumatic be simpler? I do enjoy my daisy 717's (Although they will soon be getting sold) and they are super super simple. You could even use something like the daisy valve / barrel as a basis and build up a pistol from that? 18 dollars for a barrel / valve assembly or even the lothar walther barrel / valve from the 747 (45 dollars) .


Reading the first page this was exactly my thought: SSP. I hadn't thought of Daisy specifically, but there's no reason why not. I'd love something like an affordable Feinwerkbau 103.

What is the goal of this: a brand new unique pistol or a modern replication of a classic such as the Mod.5?

As to the legal aspects. I believe it is legal for a private individual to build a sub legal limit airgun for their own use, and possibly for others, but as soon as money starts changing hands then it becomes trade or business and VCRA applies, i.e. the individual needs to be an RFD. It may be ok if the money is changing hands only to cover costs, but it would be open to interpretation and I wouldn't want to be a test case.

Our esteemed Mr Hulme is now an RFD, so may be a source of valuable advice.

P.S. This no doubt deviates hugely from you guys' design goals but if I was coming up with it I would design it to be also usable for pistol FT, so ideally 4 ft.lbs minimum and facility for fitting optics. I'd certainly be interested in a SSP with these criteria. :dance:
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Re: Let's Build an Airgun

Postby Tank » Fri Jan 03, 2014 1:33 pm

Using a ready made valve is certainly something that should be considered, if, for no other reason, parts will be readily available at Service time. It makes very good sense.
As Phil has indicated, CO2 is a very good option. The Czech manufacturers of Tau and Brno pistols didn't just wake up one morning and say "let's build a CO2 pistol that would be a great Target tool". No, that was by design. One of the most modified and customised pistols around is the Crosman 2240/2250 and the valve from that pistol is simplicity in itself.
I see no point in re-inventing the wheel.
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Re: Let's Build an Airgun

Postby Tank » Fri Jan 03, 2014 1:36 pm

But as Adam has indicated, the Feinwerkbau 103 is a terrific gun and my own Walther LPM1 is one of my favourites. I actually own a Feinwerkbau 103, just the owner of that particular pistol hasn't given it to me yet! Might be because he is still using it :mrgreen:

The only way to get a gun up to FT spec easily is PCP or CO2.
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Re: Let's Build an Airgun

Postby Adam77K » Fri Jan 03, 2014 2:26 pm

Oh wow! The Walther LPM-1 is new one on me so I just googled it and found the bobsairguns page! :drool:
Is that one yours Graham?

My wish list just expanded by 1.
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Re: Let's Build an Airgun

Postby savantguarde » Fri Jan 03, 2014 3:44 pm

So is this to be a silhouette gun or for paper punching? I just love ssp's so simple. The fwb 103 is pretty much the pinnacle of a muscle power pistol. The lpm 1 is no slouch either. I would love to know some better tech specs on them such as what the actuall cc they compress is.
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