Log in
Search
Latest topics
» Couple Kittens followed me home..by Michpatriot Today at 8:16 pm
» Half A Scorpion More than a Trainer
by rsv1cox Today at 7:34 pm
» Got the modeling bug this past weekend
by roddie Today at 6:57 pm
» The Nemesis
by Mike1484 Today at 6:38 pm
» My Mazda RX-7GSL-SE build log with the occasional balsa inclusion
by rsv1cox Today at 6:20 pm
» Castor proofing external servos
by rsv1cox Today at 6:07 pm
» How's the weather?
by GallopingGhostler Today at 5:38 pm
» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (February 2023)
by GallopingGhostler Today at 5:34 pm
» My Flying Spot
by Yabby Today at 2:43 pm
» Cox TD Run In / Break In Stick
by Yabby Today at 2:33 pm
» NZ here we come.
by Oldenginerod Today at 2:27 pm
» Old Glow heads
by Kurtok Today at 2:10 pm
A butane torch, containers, some lead and my Graupner Wankel
Page 1 of 1
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
Use your heat gun to heat the counterweight and use tweezers to place the lead in the holes? A heat gun should provide plenty heat, I have soldered with one. (Don't ask why)

pman1111- Bronze Member
- Posts : 37
Join date : 2022-01-15
Re: A butane torch, containers, some lead and my Graupner Wankel
Round lead fishing weights are suitable for this. Cut half and melt
https://www.amazon.com/dp/B0925TT936/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B0925TT936&pd_rd_w=sxcGd&content-id=amzn1.sym.46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_p=46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_r=6ZNAY4SK5QQQ28P9Q7EJ&pd_rd_wg=FCd7j&pd_rd_r=464289a5-8369-46e5-a146-ab5c827725eb&s=sporting-goods&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFZR1NVTjFQR1hKR08mZW5jcnlwdGVkSWQ9QTA4MTg1NjU1N0w0WE5TNFM0MDgmZW5jcnlwdGVkQWRJZD1BMDU3MjIyNDFFNlI1TVBRSEFFRk8md2lkZ2V0TmFtZT1zcF9kZXRhaWwmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl


https://www.amazon.com/dp/B0925TT936/ref=sspa_dk_detail_0?psc=1&pd_rd_i=B0925TT936&pd_rd_w=sxcGd&content-id=amzn1.sym.46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_p=46bad5f6-1f0a-4167-9a8b-c8a82fa48a54&pf_rd_r=6ZNAY4SK5QQQ28P9Q7EJ&pd_rd_wg=FCd7j&pd_rd_r=464289a5-8369-46e5-a146-ab5c827725eb&s=sporting-goods&sp_csd=d2lkZ2V0TmFtZT1zcF9kZXRhaWw&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFZR1NVTjFQR1hKR08mZW5jcnlwdGVkSWQ9QTA4MTg1NjU1N0w0WE5TNFM0MDgmZW5jcnlwdGVkQWRJZD1BMDU3MjIyNDFFNlI1TVBRSEFFRk8md2lkZ2V0TmFtZT1zcF9kZXRhaWwmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

Levent Suberk- Diamond Member
- Posts : 1849
Join date : 2017-12-24
Location : Türkiye
Re: A butane torch, containers, some lead and my Graupner Wankel
Thanks pman and Levent. That's a thought, heat the counterweight with the lead in the holes. A heat gun should not damage the counter weight but a torch might. I will try that first.
Hmm....just remembered, I used a torch to heat the counterweight to remove it from the crankshaft which melted the lead in the first place. Now, if I don't burn the house down.
Bob
Hmm....just remembered, I used a torch to heat the counterweight to remove it from the crankshaft which melted the lead in the first place. Now, if I don't burn the house down.

Bob
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
My thinking was the heat gun would be less likely to discolor the metal, also provide some air movement to keep the vapors away from the user,
Don't breathe the vapors from the melted lead.......
Don
Don't breathe the vapors from the melted lead.......
Don
Last edited by pman1111 on Mon Jan 02, 2023 12:31 pm; edited 1 time in total (Reason for editing : adding name)
pman1111- Bronze Member
- Posts : 37
Join date : 2022-01-15
Re: A butane torch, containers, some lead and my Graupner Wankel
pman1111 wrote:My thinking was the heat gun would be less likely to discolor the metal, also provide some air movement to keep the vapors away from the user,
Don't breathe the vapors from the melted lead.......
Don
Thanks Don, but that ship sailed the first time. I had no idea that those holes were lead filled.
Probably will do it out in the garage with door and windws open. But thanks for the caution, I was going to do it at the kitchen sink. Fire/water you know.

Bob
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
Well, I cut the lead up into small pieces and tried to even them out between the four holes. Used all the lead that originally came out. Heated with the torch and paddled it around. Close enough but not perfect. Sandblasted (aluminum oxide media) it along with the heat sink ring and the muffler off the OS-30. Gives a frosted look that will be mitigated with a toothbrush and aluminum polish. Looks better than the stained mottled surface of before.
Again, sorry for the poor pictures. This Nikon does not tolerate my shake like the Olympus does. Last picture was when I layed the camera down and just pressed the take button.



Again, sorry for the poor pictures. This Nikon does not tolerate my shake like the Olympus does. Last picture was when I layed the camera down and just pressed the take button.



rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
If you need a little more lead, I'm sure you have an old shotgun shell to donate a few pellets to the project
pman1111- Bronze Member
- Posts : 37
Join date : 2022-01-15
Re: A butane torch, containers, some lead and my Graupner Wankel
pman1111 wrote:If you need a little more lead, I'm sure you have an old shotgun shell to donate a few pellets to the project

Yes, I have scattered a few of those pellets around the hills and valleys of Virginia and West Virginia.
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
It's coming along nicely.
NEW222- Top Poster
- Posts : 3781
Join date : 2011-08-13
Age : 44
Location : oakbank, mb
Re: A butane torch, containers, some lead and my Graupner Wankel
Scratch another one off, it's done except for some time on a test stand. Not holding out much hope, little to no compression but the fellow in the video, he had almost no compression either so we will see. More of an educational toy for me rather than a functioning engine.
New 3mm hex heads from China (cheap) installed and cross tightened. I had ordered #2's for the back case but too small, #3's are too big, but there is a 2.5mm should have ordered those too. But I found that 2/56's cut to length screw right in so I used those. Should help out when repairing my European locomotives too.

As received.


Not losing another ten dollar Woodruff.



New 3mm hex heads from China (cheap) installed and cross tightened. I had ordered #2's for the back case but too small, #3's are too big, but there is a 2.5mm should have ordered those too. But I found that 2/56's cut to length screw right in so I used those. Should help out when repairing my European locomotives too.

As received.


Not losing another ten dollar Woodruff.



rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
OS uses M2.6 most of the time. I can't think of a time I've seen M2.5 in an OS. M2.5 obviously fits, but if at the low end of the tolerance can be tough on the threaded hole. M2.6 can be hard to find.
I used 2-56 in a metric application in a pinch just last week, but it was in place of M2.2. M2.2 has the same pitch as M2.5 and M2.6. M2.2 would have little to no thread engagement and be obviously loose in an M2.5 or M2.6 hole. Now 3-56 could be acceptable, if the proper screw isn't available. For a thread in aluminum, I would get the right fastener.
I used 2-56 in a metric application in a pinch just last week, but it was in place of M2.2. M2.2 has the same pitch as M2.5 and M2.6. M2.2 would have little to no thread engagement and be obviously loose in an M2.5 or M2.6 hole. Now 3-56 could be acceptable, if the proper screw isn't available. For a thread in aluminum, I would get the right fastener.
gkamysz- Gold Member
- Posts : 282
Join date : 2018-02-22
Location : Chicagoland
Re: A butane torch, containers, some lead and my Graupner Wankel
When I lived in Japan, I was able to easily find all the metric hardware for my 1987 Suzuki LS650 Savage, that was my travel to work vehicle. Even bought hardware at the 100 Yen stores (equivalent to dollar stores in US, but much better quality items). Here, it took further digging and sometimes mail ordering. For bolts with nuts through an unthreaded hole, substitutes ANSI/ASE. Just too bad there isn't a Japanese Fastenal or McMasters available locally.gkamysz wrote:For a thread in aluminum, I would get the right fastener.
Some of my engines that used metric, I retapped the hole for ANSI. Where threads were stripped, retapped for next size up. However, the down side is needing end taps for short depth holes, which can be expensive, unless one is fortunate to have such available at their workplace.
GallopingGhostler- Top Poster
- Posts : 3842
Join date : 2013-07-13
Age : 68
Location : Clovis, NM, USA
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
Misumi has any metric thingamathing you could ever want. Sometimes you have to wait and generally cost more than McMaster.
There are also the old (< mid 1960's?) obsolete Japanese threads which are hard to find. Only a few sizes didn't match the ISO standard. I think sometimes you find them on Enya ans OS. It's a problem with cars and bikes as well.
There are also the old (< mid 1960's?) obsolete Japanese threads which are hard to find. Only a few sizes didn't match the ISO standard. I think sometimes you find them on Enya ans OS. It's a problem with cars and bikes as well.
gkamysz- Gold Member
- Posts : 282
Join date : 2018-02-22
Location : Chicagoland
Re: A butane torch, containers, some lead and my Graupner Wankel
I can search, buy and send 2.5 or any size metric screws to you. If you want specify the size and send a photo of screws 

Levent Suberk- Diamond Member
- Posts : 1849
Join date : 2017-12-24
Location : Türkiye
Re: A butane torch, containers, some lead and my Graupner Wankel
The parts breakdown I have for this version doesn't list size and the part number didn't come up online at all. The back cover screws are listed as M2.6 in the later engines.
The odds of that hole being M2.2 are zero. If you have 2-56 in the M2.6, I'm quite surprised it didn't strip just snugging it up like the one I just tested did. I've never seen 3-56 in the wild.
Measure the diameter of the screw threads with a mic or caliper to figure out what they are. M2.5 and M2.6 can be hard to differentiate.
The odds of that hole being M2.2 are zero. If you have 2-56 in the M2.6, I'm quite surprised it didn't strip just snugging it up like the one I just tested did. I've never seen 3-56 in the wild.
Measure the diameter of the screw threads with a mic or caliper to figure out what they are. M2.5 and M2.6 can be hard to differentiate.
gkamysz- Gold Member
- Posts : 282
Join date : 2018-02-22
Location : Chicagoland
Re: A butane torch, containers, some lead and my Graupner Wankel
gkamysz wrote:The parts breakdown I have for this version doesn't list size and the part number didn't come up online at all. The back cover screws are listed as M2.6 in the later engines.
The odds of that hole being M2.2 are zero. If you have 2-56 in the M2.6, I'm quite surprised it didn't strip just snugging it up like the one I just tested did. I've never seen 3-56 in the wild.
Measure the diameter of the screw threads with a mic or caliper to figure out what they are. M2.5 and M2.6 can be hard to differentiate.
Thanks, when I get a chance I will remove the screws and compare the originals against the replacements. I have a micrometer and I think the proper thread gages.
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia
Re: A butane torch, containers, some lead and my Graupner Wankel
If you're searching for 2.5mm or 2.6mm screws, try Microfasteners.com. They have screws in both thread sizes, lengths, head types and metals.
I have used them numerous times -- their pricing is competitive and shipping reasonable.
a--
I have used them numerous times -- their pricing is competitive and shipping reasonable.
a--
Re: A butane torch, containers, some lead and my Graupner Wankel
andrew wrote:If you're searching for 2.5mm or 2.6mm screws, try Microfasteners.com. They have screws in both thread sizes, lengths, head types and metals.
I have used them numerous times -- their pricing is competitive and shipping reasonable.
a--
Thanks Andrew, they do have 2.5mm's and assortments which I like. They are also located quite close to me in Easton Pa.
http://www.microfasteners.com/astmet-metric-socket-head-cap-screws..html
rsv1cox- Top Poster
Posts : 8851
Join date : 2014-08-18
Location : West Virginia

» New butane soldering torch
» SIG champion fuel
» OS/Graupner Wankel - It had to happen
» Graupner Wankel Typ 7/67 Prototype
» Carrying the Cox Torch-The Next Generation
» SIG champion fuel
» OS/Graupner Wankel - It had to happen
» Graupner Wankel Typ 7/67 Prototype
» Carrying the Cox Torch-The Next Generation
Page 1 of 1
Permissions in this forum:
You cannot reply to topics in this forum