Search found 139 matches

by sd80mac
Sat Jul 13, 2019 6:28 pm
Forum: Prototypes / Models
Topic: New KADEE #705 Couplers
Replies: 7
Views: 1461

New KADEE #705 Couplers

Kadee has announced a new #705 HOn3 coupler. This coupler is very similar in appearance to its HO scale #58/158 counterpart, and according to Kadee, "The #705 Metal Coupler will work anywhere a #713 or #714 Coupler will work...features an all metal coupler head, shank, and centering spring and comes...
by sd80mac
Tue Nov 29, 2016 7:41 pm
Forum: Prototypes / Models
Topic: SDP40F project
Replies: 27
Views: 3501

Re: SDP40F project

At this point, TT-scale is so wide open that almost any locomotive would better than nothing. In the case of this particular locomotive, having cars available to haul behind it would better justify it's existence. That said, I do think that an F40PH would sell a bit better, but you still need someth...
by sd80mac
Mon Nov 14, 2016 6:56 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

Hi Brian,

At least finish the Blomberg truck. This way, other modelers can just adapt a correctly done truck to whatever design they create.

Donnell
by sd80mac
Mon Nov 07, 2016 4:20 am
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

I personally believe that you have more than enough shaft length (4-5mm) to mount a flywheel on the short end. The shaft is about 6mm long and a 10-12mm diameter flywheel at least 10-12mm in length would fit fine. For drive shafts, I still recommend the "hex" style, with a 4mm hex socket machined in...
by sd80mac
Tue Oct 11, 2016 7:39 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

12.7mm, the same width as the shorter motor.

Donnell
by sd80mac
Tue Oct 11, 2016 6:31 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

Hi Brian, I also went on AliExpress and incidently ordered 30 "Kato clone" motors for several HO-scale projects while looking for the TT-scale motors. The black motor that I posted was $7.00 each from the AE supplier, but I went on eBay and saw the same motor at a cost of 2 for $5.10. So, I ordered ...
by sd80mac
Sun Oct 09, 2016 11:53 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

While browsing on AliExpress, I came across this motor: https://www.aliexpress.com/item/12v-and-24V-Ndfeb-magnetic-carbon-brush-rotor-large-dc-motor-hm-ship-model-motor/32654622299.html It's a 5-pole skew wound design running 13000RPM @ 12v. It may actually be the closest contender to the Mashima mo...
by sd80mac
Sat Oct 08, 2016 5:16 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

My vote is for a proper motor mount, again something similar to Kato or Athearn Genesis. If space is an issue, then a simple etching may be a good alternative.

Donnell
by sd80mac
Sat Oct 08, 2016 5:51 am
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

The project looks really good so far. You are making great progress! I'm sorry I haven't had much time to contribute as I am building a workshop in the backyard, but keep.up the good work! I've also noted that you made provision for the Mitsumi motor in addition to the Mishima. Good move! According ...
by sd80mac
Fri Aug 19, 2016 1:37 pm
Forum: Prototypes / Models
Topic: Chapman GP7 Project
Replies: 302
Views: 29604

Re: Chapman GP7 Project

Fortunately, NWSL makes mod 0.3 gears if you need a quick reference for actual gear size before you cut your own. Unfortunately, they are very expensive (at least for my budget) @ $9.95 each. I may spring for one set as a proof of concept, but will have to find more economical means of gear producti...

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