Member postings for murkmannz

Hi,

I am drawing down to scale now. I have a few questions that seem to have many answer.

How much sideways float should I allow in the axles? I read somewhere that the driving axle should not have any sideways float which did make some sense to `me. Should the axles further away from the drive axle have proportionately more sideways float?

If everything was machined perfectly with no float then I would think binding would be an issue in the driving mechanisms with movement in the suspension. So where should there be increase float or loose fits?

Another annoyance is not being able to find a wheel standard. I have been to these websites (**LINK**, **LINK**) and have looked at some plans but there is no consistency. Is there something I have missed?

Thanks

Edited By murkmannz on 26/05/2020 22:42:47

Thanks Phil. I have seen the G8.3 drawings, just not all the drawings are available. Maybe I need to meld the G8.2 drawings with the G8.3

Regards

Ian

I am thinking of changing to building a BR56....... anyone seen plans?

Thanks

Hi John,

Thanks for the info. I have formulated a few ideas on my approach. I saw the video on you tube where epoxy composite was molded around a simple cast iron frame made from square. Then the cast iron machined for rails afterwards. I think this approach will suit me best, I will need to approach a few companies to see about machining.

I am currently pondering connection design between the y and x Axis frame. I also need to find a source for servo motors.

Regards

Ian

Thanks Phil, yes it is KPEV, I like the one you posted but I guess I am not sure if it is appropriate to paint the number version loco in the lined scheme?

thanks

Ian

This the loco I want to end up with. I like this one because, 1 the colours and 2 all the auxilaries make it look industrious and interesting. I will be trying to make the model the same.

Thanks for the info. Now I have started to search for info on axle boxes I found some informative information and most importantly some pictures (pictures say a 100 words!) . Here was an interesting PDF .

This picture helped me see what I have been reading...

So with this in mind, I will have another look at the drawings. 

Edited By Ian Baxter 4 on 06/03/2019 21:31:14

Also, it is hard to see in the drawing exactly the makeup of the axle block, it comprises of a number of bits. Anyone have more information on the design and purpose?

Thanks in advance.

I have acquired drawings form the Heba site and started to cad up the locomotive.

I have some questions about the horn block and axle block and would be thankful for some insight into the design. Why the wedge and adjustment screw? Maintanence? take up wear? other?

I have attached a picture with arrows pointing to what I am asking about, I hope it is clear enough.

Hi John,

I am also wondering what motors you are using, steppers? Any encoders?

Thanks

Ian

Thanks John.

Did you vibrate your mold? I see your from Australia, I am from NZ. Where did your get your granite aggregate?

I am also a mechanical engineer, I have no problem designing things, its the details about molding expoy and knowing the right way to do certain things I have not done before.

Regards

Ian

Hi John, nice work!

This is exactly the size machine I would like to build.

I am interested in some of your thoughts, could one keep the steel cast bolted to the expoy granite as part of it? Is there an advantage or disadvantage either way?

Also I am wondering about the metal rails cast into the epoxy, could one just have the rails milled and ground by a machine shop after? or did you have a reasons for doing it this way?

Will you be using preloaded linear bearing blocks or standard?

Thanks

Ian

That steam turbine loco looks very interesting!

Thanks Weary, useful info.

I have in my hands the Eisenbahn Journal with the BR55 article, some great pictures and some drawings with basic dimensions too.

The Tender is a 3 T 16.5

Thanks Phil,

I have checked out the garba.de, but had not found the Live steam service.

I am a bit green and did not know that tenders had designations as such. When the magazine arrives, I hope it has some good info in it, such as tender designation.

Hi,

I am keen on building a BR 55 0-8-0, I havent found any plans. I think a Nigel Gresley 2-8-0 will be suitable to modify for a BR 55, I did a quick estimate of wheel size and they would seem to be very close also the valve gear looks to be the same.

I have some magazines coming, one has the BR 55 article in it. I will also use a H0 Fleishmann Model to model off.

The question is do I have the patience for this...

Has anyone built a BR55?

Thanks. Ian