Minimum Gauge

Granitechops

Before joining this forum I read Little Andy's tip for making a flywheel, Great idea, but I am still making a pigs ear out of it.

No I dont want a silk purse just an adequate flywheel

MY first effort from 11 months ago

I started out with cutting the spokes out of plasticard, then cutting out rough flat rims, laminating them to the spokes,
& turning them in my pillar drill

one side

_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 9:17 am Post subject:

Other side,

going from memory it delaminated on turning, & needed bits scafing in, as it was so laborious cutting out the centres for the spokes, I think I just gave up.

On refection I could possibly rescue this effort by adding another circle to this side, & turning again,

Thing with turning plasticard is you have to do it gently or heat build up causes drag & a lumpy surface,
But what I was looking for was a quick, repeatable process
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 9:19 am Post subject:

A lot of fettling, filing, shaping, filling is going to be needed to make this one work Rolling Eyes

_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 9:51 am Post subject:

After reading Andys thread I got one of these from Back to Bay 6, nice casting

But as I am not really into turning, all I acheived was to polish it rather than turn it flat on the outside rim.

So I ended up distorting it

Might rescue it yet

But what I am looking for is to be able to batch build, rather than a one off
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 9:55 am Post subject:

Then I dug into my "New bits that might one day be useful box & found a pair of Binnie engineering curly spoked wheels

So I turned them down flat, paired them up, & added a plasticard 40 thou rim, doing them together ensured a square rim

_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 10:05 am Post subject:

Now having handled real flywheels as a lorry driver I knew how thick the rim is & thus how heavy they are, Smile

So I added some more layers of plasticard this time 20 thou,wrapping a continuous strip round to speed up the process,

doing a 40 thou layer one at a time takes longer with getting the layer the correct length.
Because even if you use a piece of paper to measure the circumference, the thickness means it is too short!!! Embarassed

possibly too thick!!

But the problem was it was getting out of true with all the wrapping

Its in the vice to stop the plastic springing back off before the solvent dries
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 10:12 am Post subject:

Put in pillar drill & slowly turned to clean up

Like the spokes, but not happy with the rim,

will try again

This one may clean up, but too time consuming for me
I like batch building
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 10:19 am Post subject:

Just remembered another way I tried a few months back

I had some dolls house metal tricycles, so I took a metal wheel, removed the three wire spokes, inserted an acrylic disc in the centre & added straight srtyrene spokes on top.

But again not neat, not quick, a mess, too fiddly,

Dont get me wrong I dont mind fiddly, as long as there is'nt a better way to do it

_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sat Aug 15, 2009 10:23 am Post subject:

So suggestions please other than buying ready made ones Rolling Eyes

Oh & what did you use as a cutting tool Andy please when you did yours???

Thanks
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

michael · Posted: Sun Aug 16, 2009 3:37 am Post subject:

DonI think that the curly spoked wheel is ok if you just reduce the size of the rim, it does look a bit heavy.
_________________
Regards Michael
If you believe you can make something, you can make it.

http://users.xplornet.com/~macton/index.html

Granitechops · Posted: Sun Aug 30, 2009 9:47 am Post subject:

Turned flywheel down a bit, made a basic engine block to mount it on.
Misplaced the other flywheel! Embarassed

Just a freelance Stationery to drive a small mine lighting set, fuel tank will sit on the top shoulder

vaguely after the style of a Lister

_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation

Granitechops · Posted: Sun Aug 30, 2009 9:51 am Post subject:

Granitechops · Posted: Thu Sep 10, 2009 5:42 am Post subject:

Engine beginning to take shape, now looks like this

Just found the mislaid flywheel, so must get that finished & add to model as I want a twin flywheel
_________________
Don
Stoneycombe & The Penrose Valley Railway in Sunny Devon
http://www.youtube.com/watch?v=dqXftHeRMUU . . Modelling is 50% observation & 50% Adaptation