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1.7" PVC compound rounds

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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1.7" PVC compound rounds

Unread postAuthor: jagerbond » Mon Jun 29, 2009 6:04 am

CP-CG differential = 1 caliber for excellent stability
Designed for use with 1.5" SDR-21

Construction
PVC puck with center tapped hole, 5"s of 1.25" SDR-21
Custom turned steel cap

[youtube]http://www.youtube.com/watch?v=q3uYFQdfj0A[/youtube]

The entire video above was shot using only ONE round! Target distance = 50 yards.

We will be retailing DIY kits for $20 which contain 6 steel caps, 20 skirts, 20 center drilled pucks, 20 socket cap screws. Assembly requires PVC glue and a few seconds.
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Unread postAuthor: dewey-1 » Mon Jun 29, 2009 6:43 am

Looks like you found the right length/weight combination to achieve that "magic number" for flight stability.

The skirt tubing end, held up quite well.

Looking forward to pneumatic operation! HINT HINT :D
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Unread postAuthor: spudtyrrant » Mon Jun 29, 2009 8:22 am

i will have to buy a set of these $20 for 20 great deal how many prototypes did it take to to get that awesome flight stability again great product p.s. how many shots do you think the center drilled pucks will last
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Unread postAuthor: Gippeto » Mon Jun 29, 2009 9:35 am

I think you have a real winner with this round. Great performance for the dollar.:D

You guys never fail to impress. 8)

Any plans for additional bore sizes??
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Unread postAuthor: spudmanb3 » Mon Jun 29, 2009 11:27 am

That's awesome! only one round for the whole video. next step is to make a semi automatic gun that shoots these.
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Unread postAuthor: jimmy101 » Mon Jun 29, 2009 12:08 pm

Very impressive.

I second the request for other calibers, SCH 40 1.5" and 2" in particular since those are so common.

Have you considered developing a parachute round?
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Unread postAuthor: dewey-1 » Mon Jun 29, 2009 12:25 pm

jimmy101 wrote:Have you considered developing a parachute round?


I have had discussions with Mike about the same thing a few weeks ago.

I too am looking forward to the "Urban Projectile"
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Unread postAuthor: pizlo » Mon Jun 29, 2009 12:33 pm

Glad you picked steel over lead, because the pancaking lead made those other rounds worthless. These look awesome!
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 29, 2009 2:06 pm

Great stuff, good to see that it survived impact with MDF too :)

Just a though, since you now have a projectile with a hollow tail, why not consider putting the fuel/air mix there and closing it off, along the same spirit of the rocket ball cartridge?

Benelli made a round on similar lines which they attempted to usein a submachinegun.

Basically you'd have all the advantages of a self contained cartridge, without the problem of having a mechanism to eject the cartridge. Power would be down compared to the current launchers but a semi/full auto launcher would be relatively simple to develop...
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Unread postAuthor: jagerbond » Mon Jun 29, 2009 3:20 pm

spudtyrrant wrote: how many shots do you think the center drilled pucks will last


It will depend on the target. Using carpet or wood as a backstop I think you could re-use all day. Usually the failure point is the tail.

Gippeto wrote: Any plans for additional bore sizes??


Yes. The 1.7 was nice because no modification to tail needed. We will probably thermo form applicable sized SDR-21 for the common bore sizes. I say we, but truth is USGF will probably build a robot.

Pizlo wrote: Glad you picked steel over lead, because the pancaking lead made those other rounds worthless


Not to mention causes cancer in California :P

jackssmirkingrevenge wrote: Great stuff, good to see that it survived impact with MDF too


The MDF still has the round embedded in it and hangs on the shop wall. I forgot to take a pic when I left on Saturday. Maybe USGF will take a photo and post for us.

Thanks for all the comments.
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Unread postAuthor: USGF » Wed Jul 01, 2009 6:49 am

jagerbond wrote:
spudtyrrant wrote: how many shots do you think the center drilled pucks will last


It will depend on the target. Using carpet or wood as a backstop I think you could re-use all day. Usually the failure point is the tail.

Gippeto wrote: Any plans for additional bore sizes??


Yes. The 1.7 was nice because no modification to tail needed. We will probably thermo form applicable sized SDR-21 for the common bore sizes. I say we, but truth is USGF will probably build a robot.

Pizlo wrote: Glad you picked steel over lead, because the pancaking lead made those other rounds worthless


Not to mention causes cancer in California :P

jackssmirkingrevenge wrote: Great stuff, good to see that it survived impact with MDF too


The MDF still has the round embedded in it and hangs on the shop wall. I forgot to take a pic when I left on Saturday. Maybe USGF will take a photo and post for us.

Thanks for all the comments.


I hate when I gotta make robots. Got a lot of Zombies too. OK, here are the pictures:


USGF
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bonafide 3/4" thick MDF with Melamine laminate, 1.7" round
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This a very much a family show
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Unread postAuthor: jagerbond » Thu Jul 02, 2009 7:43 am

Supplies for the 4th. muhahaha
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Unread postAuthor: Technician1002 » Thu Jul 02, 2009 11:20 am

jagerbond wrote:Supplies for the 4th. muhahaha


Tie on some glowsticks on the inside with mason line for some night tracer rounds. The pink and orange ones are great for states that don't allow fireworks that flies into the air (like Oregon). Did that one year and attracted all sorts of attention. It wasn't fireworks. :D
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Unread postAuthor: jackssmirkingrevenge » Thu Jul 02, 2009 2:06 pm

Forking hell, I take it there's been a bit of public interest :)
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Unread postAuthor: jagerbond » Thu Jul 02, 2009 2:47 pm

jackssmirkingrevenge wrote:Forking hell, I take it there's been a bit of public interest :)


Most notably was "I want 50 and know that 200 more are available". :shock:

We need a thermal forming robot... USGF?
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