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Author Previous Topic: In-ko-pah RR: New project Topic Next Topic: Intro.- the Holt house-the White house. Finale.
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CNE1899
Engine Wiper

Supporting Member


Posted - 01/11/2021 :  1:22:30 PM  Show Profile  Reply with Quote
Jim,
Nice mechanism work! I end up doing a lot of this kind of stuff at work. Part of the fun
is figuring out what mechanism will address the problem, and then building it.

Scott



Country: | Posts: 115 Go to Top of Page

George D
Moderator

Premium Member


Posted - 01/11/2021 :  2:13:10 PM  Show Profile  Reply with Quote
quote:
Originally posted by BurleyJim



You guys might end up being right. I was more concerned about mounting the 3 mm pivot blocks closer to the top of the doors and having the pb wire droop into the engine path. Still have ability to change if needed.

Jim




Not only the ability to change, but the willingness to do it when it's called for.

George


Fly Army

Country: USA | Posts: 16596 Go to Top of Page

BurleyJim
Fireman

Premium Member


Posted - 01/11/2021 :  4:51:26 PM  Show Profile  Reply with Quote
Scott, thanks for checking it out.

George, I'm on it! By moving the pivot point away from the hinges, it will be an easier push-pull for those servo wires. The overall 'throw' distance will multiply, but I thinkI've got enough movement to make that work. So, I've already exercised the option and came up with 'Franks Bracket'. The nubs will face the back of the door, and it will glue on to the existing bracket. If it flys, I'll clip off the original wings, and give it more width clearance entering the stalls.



On the printer right now.

Thanks Frank & George!

Jim





Take the red pill

Country: USA | Posts: 6036 Go to Top of Page

BurleyJim
Fireman

Premium Member


Posted - 01/14/2021 :  5:44:17 PM  Show Profile  Reply with Quote
Well it was back to the drawing board. While the flexing of the servo pushwires was greatly reduced with Frank1, the doors wouldn't open wide enough to let the engine in. So, it was time to rethink and redraw a solution. The 3mm pivot cube just wouldn't allow enough movement. so Jimslot1 was created to work with Franksbracket1. Still not enough to get the doors open wide enough. So, Franksbracket2 was built with a wider stance, but it had to reach further down into the opening. Jimslot2 was drawn and printed. By offseting the far end throw point. It easily opens and closes the doorway with a lot less drag in both directions.




The new setup will take some rework on the front doors again.





Stampcollecting was boring!

Jim




Take the red pill

Edited by - BurleyJim on 01/14/2021 6:27:20 PM

Country: USA | Posts: 6036 Go to Top of Page

Frank Palmer
Fireman



Posted - 01/14/2021 :  6:39:10 PM  Show Profile  Visit Frank Palmer's Homepage  Reply with Quote

Jim, if it was easy I'd have one of those Frankenstein brackets. After all it's one of those YA3DPs.


Frank

Country: USA | Posts: 6088 Go to Top of Page

robert goslin
Fireman

Premium Member


Posted - 01/16/2021 :  01:25:05 AM  Show Profile  Reply with Quote
Excellent work Jim. Nice to be able to have operating doors. Very ingenious.

Regards Rob

My current build.
http://railroad-line.com/forum/topic.asp?TOPIC_ID=53468

Country: Australia | Posts: 2665 Go to Top of Page

BurleyJim
Fireman

Premium Member


Posted - 01/16/2021 :  10:13:29 AM  Show Profile  Reply with Quote
Frank, you're right as usual.

Rob,

Thanks, the open/close mechanism has become quite a hassle. I used 'Bondic' glue to attach the fittings to the doors, and it offers almost no adhesion. Very disappointed in wasting money on it. Plus of course more rework time. Thanks for following along.

Jim



Take the red pill

Country: USA | Posts: 6036 Go to Top of Page

Guff
Fireman

Premium Member


Posted - 01/16/2021 :  2:27:08 PM  Show Profile  Send Guff an AOL message  Reply with Quote
Jim,
You do a great job on the mechanical movement parts. It would be nice to have your ability. Keep up the good work!


David Guffey

Country: USA | Posts: 2043 Go to Top of Page
Page: of 8 Previous Topic: In-ko-pah RR: New project Topic Next Topic: Intro.- the Holt house-the White house. Finale.  
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