Search found 25702 matches

by jackssmirkingrevenge
Mon Mar 23, 2020 9:38 pm
Forum: BB, Airsoft, and Pellet Guns
Topic: Shock absorber spring rifle?
Replies: 2
Views: 352

Re: Shock absorber spring rifle?

This outbreak really is bringing people back online :D a lot of force needed to compress it though It would probably look like a ratchet mechanism on an ancient ballista. Doubtless an interesting project but on this scale pneumatics are so much more practical in terms of using off-the-shelf materials.
by jackssmirkingrevenge
Mon Mar 23, 2020 9:30 pm
Forum: Off-Topic Hobbies
Topic: "Offtopic-posts-topic" NSFW
Replies: 6619
Views: 242136

Re:

It took a gosh darn global pandemic to get him back here :roll: :D how many days of quarantine is it? Don't remember the last time I signed into the files and made a post. Who calls this place "the files"? https://i.imgur.com/BYyr2vw.gif :D Last year I got a call from SpaceX, and made the decision t...
by jackssmirkingrevenge
Mon Mar 23, 2020 9:20 pm
Forum: Combustion Cannons
Topic: Can't download GGDT. You have?
Replies: 1
Views: 259

Re: Can't download GGDT. You have?

Welcome to the forum! You can find them here, for a combustion spud gun you want HGDT:

viewtopic.php?p=387228#p387228
by jackssmirkingrevenge
Thu Mar 19, 2020 9:02 am
Forum: BB, Airsoft, and Pellet Guns
Topic: .25 cal Umarex 1894 Conversion
Replies: 2
Views: 549

Re: .25 cal Umarex 1894 Conversion

Very cool project! We have these at the shop and were just discussing how it would be the basis for something a bit more hardcore :D I guess the valve looks a bit like the one on airsoft revolvers? https://i.imgur.com/wYllAqL.jpg If so you might want to look into the possibility of opening up the fl...
by jackssmirkingrevenge
Wed Mar 18, 2020 8:58 am
Forum: Combustion Cannons
Topic: How-to: Syringe Fuel Metering
Replies: 25
Views: 9812

Re: How-to: Syringe Fuel Metering

Welcome from the land of the lurkers! But now here comes my question, because my chamber is 30ml there is only ~0,6ml of atmospheric air in the chamber left, far off of stoichiometric ratio. So should I pump 20 BAR insted of 19 to get right ratio, or am I missing something here? That's an interestin...
by jackssmirkingrevenge
Wed Mar 18, 2020 8:52 am
Forum: Off-Topic Hobbies
Topic: Waste oil burner
Replies: 17
Views: 3135

Re: Waste oil burner

Gippeto wrote:
Tue Mar 17, 2020 9:37 am
Debby Dunning had it going on
Arguably still does, for someone past the half century mark.
by jackssmirkingrevenge
Tue Mar 17, 2020 12:57 am
Forum: Off-Topic Hobbies
Topic: Waste oil burner
Replies: 17
Views: 3135

Re: Waste oil burner

Gippeto wrote:
Mon Mar 16, 2020 9:01 pm
Would do a "Tim Taylor" quote here, but you're all likely too young to remember and grasp the humor lol.
Oh don't give up on them just like that :)
by jackssmirkingrevenge
Sun Mar 15, 2020 9:03 am
Forum: BB, Airsoft, and Pellet Guns
Topic: Self contained airsoft, pump action.
Replies: 23
Views: 2024

Re: Self contained airsoft, pump action.

Neat idea to have the cylinder compress forward instead of back, I've seen this in Nerf guns but never an airsoft. Seems like it would be good for a compact bullpup as you seem to have. The original version of the Silverback SRS A1 cocked the piston on the forward stroke but most users didn't like ...
by jackssmirkingrevenge
Fri Mar 13, 2020 1:45 pm
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

If only you had access to a machine capable of turning cylindrical features on the sort of metric leadscrew blanks one can purchase online, all you'd need to do would be to make up new leadscrews and stick some labels on the existing dials. Oh man I've been wanting one for ages :roll: :D Seriously ...
by jackssmirkingrevenge
Fri Mar 13, 2020 9:20 am
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

The people I know doing "real" DROs on small machines are using magnetic scales with home-potted heads bought, generally, direct from Renishaw. The heads run ~$30-40 a piece, the scales around $50/metre, you need to bring your own housings, potting compound, cables and readout to the party but the ...
by jackssmirkingrevenge
Thu Mar 12, 2020 11:17 am
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

Thanks for the help guys, this is one avenue I hadn't even thought about and made me feel a lot better about having a less than perfect compound slide. Speaking of the latter, Busy Bee offered me a new leadscrew but it doesn't seem to be the issue, so I've ordered a whetstone so be able to smooth it...
by jackssmirkingrevenge
Thu Mar 12, 2020 10:06 am
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

It's attached to the ways of the lathe, the bar moves for and aft with the carriage due to the single magnet on the end...much like the one you linked, just with magnets. Sweet! So... do you just butt it up to the ways to make sure it's parallel? The only real problem with digital caliper DROs apar...
by jackssmirkingrevenge
Thu Mar 12, 2020 9:46 am
Forum: Combustion Cannons
Topic: Shooting more stuff with my spud gun! Watermelon and a couple boards
Replies: 5
Views: 1059

Re: Shooting more stuff with my spud gun! Watermelon and a couple boards

Load fries for that sweet shotgun effect, fired against something like a sheet of cardboard.
by jackssmirkingrevenge
Wed Mar 11, 2020 3:13 pm
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

Nothing near as classy...or time consuming. I cut some bits off with the dremel, and glued on some magnets...only the lowest of low tech in my shop. No kidding! So, do you reset it manually after every pass? Would think lapping compound to be a bad idea. No way of guaranteeing that you'll remove th...
by jackssmirkingrevenge
Wed Mar 11, 2020 1:37 pm
Forum: General How-To & Discussion
Topic: JSR's workshop chronicles
Replies: 26
Views: 3470

Re: JSR's workshop chronicles

For the diy dro, I'm using a modified 6" digital caliper, so more than the 1-2" of travel on a dial indicator. Mounts with magnets so it can be positioned on either side of the cross slide as needed. Ugly...but it works for what I need, and only cost a bit over $20. I don't find it too challenging ...