Motorcycles
Scale motorcycle modeling topics.
HARLEY HILLCLIMBER
justsendit
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Colorado, United States
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Posted: Wednesday, January 20, 2016 - 04:43 AM UTC
Very cool! Nice work on the small details!

—mike
krow113
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British Columbia, Canada
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Posted: Wednesday, January 20, 2016 - 12:22 PM UTC
-!!GASP!!-
A comment.
Thanks Mike , more to come.



Namabiiru
Staff MemberAssociate Editor
MODEL SHIPWRIGHTS
#399
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Rhode Island, United States
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Posted: Wednesday, January 20, 2016 - 07:14 PM UTC
Usually just too astonished to reply. Astounding detail!

tinbanger
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Ontario, Canada
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Posted: Thursday, January 21, 2016 - 06:12 AM UTC
Hi Steve!
I am just sitting back and watching!.
Great work !
krow113
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Posted: Thursday, January 21, 2016 - 09:25 AM UTC
THANKS Richard and Mark, and everyone else looking in.


...to the moon Alice , to the moon...
krow113
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Posted: Friday, January 22, 2016 - 02:35 PM UTC
...twice...



Gottaa love those shotguns!
krow113
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Posted: Saturday, January 23, 2016 - 11:27 AM UTC
krow113
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Posted: Monday, January 25, 2016 - 07:24 AM UTC
Why is there a prob with my post?
krow113
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Posted: Saturday, January 30, 2016 - 10:54 AM UTC


krow113
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Posted: Sunday, January 31, 2016 - 08:38 PM UTC
Namabiiru
Staff MemberAssociate Editor
MODEL SHIPWRIGHTS
#399
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Rhode Island, United States
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Posted: Wednesday, February 03, 2016 - 06:22 PM UTC
All you need is a miniaturized garage in the background and one would swear we were following a build of a real bike.

krow113
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Posted: Wednesday, February 03, 2016 - 08:26 PM UTC
Thanks Mark.
Slow progress as I work on a big job , real life an' all ya know.
Chain exam:
inspect element?
krow113
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Posted: Thursday, February 04, 2016 - 06:25 AM UTC
The_Snowman
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England - South East, United Kingdom
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Posted: Friday, February 05, 2016 - 10:02 PM UTC
Ooooh, PE bike chain - this can be a headache, but I have confidence in your abilities!!

You are knocking the details out of the park!!

Keep it up!!
krow113
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Posted: Saturday, February 06, 2016 - 07:18 AM UTC
No worries Gavin! Thank you.

The p/e chain is of my own design. In looking at the frets I can see some issues. I will be able to work with them but it will be a trial. Eduard was unable to do a fretless product , so 400 links will have to be finished by hand. I have a plan and have spent years pondering the work. You can see my marker and the date on the frets...
A p/e chain is easily done , Top Studio has a 1/12 scale RC211 set that passed easily for 1/9 on my Bobber:

krow113
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Posted: Sunday, February 07, 2016 - 08:28 PM UTC
krow113
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Posted: Wednesday, February 10, 2016 - 10:27 AM UTC
T'back T'day so this is all ya get:
Fuel system details.

This is an XR 750 (pushrods thru the fins -dead giveaway ) based Top Fueler. Top Fuel is Nitromethane , a monopropellant.

This system is pressurized ,the pump is the black object on the top of the engine case , usually where the mag is. The mag is re-located to the front of the engine, you will see the curved bottom of it in the lower right of the pic.

From the pump we see a big fat feed to the bottom of the tank, to the petcock , and a return to the top of the tank. In that return line we see an orange canister, this is the 'pill'. The 'pill's' orifice size is where fuel pressure is tuned.

We CANT see the line from the pump split into two , for the twin Dellorto's ( I think) float bowls, from the bowls we can see the return line up to the top of the tank. I think that's a filter in the line.

Basic system for a competition machine.

The_Snowman
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England - South East, United Kingdom
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Posted: Wednesday, February 10, 2016 - 03:32 PM UTC
Where there is a will, there is a way...

Nice solution for the chain!
krow113
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Posted: Friday, February 12, 2016 - 11:55 AM UTC
Thank you Snowman.
A oouple pieces for the shift mechanism:


krow113
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Posted: Saturday, February 13, 2016 - 09:11 PM UTC
Primary drive plate gets some detail:
krow113
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Posted: Tuesday, February 16, 2016 - 08:29 AM UTC
Chain drama:
Rather than screw around with pins , rivits , beads , crimps etc. I did try all of them to singular avail. They are all complicated and hard to assemble in an orderly fashion. I designed the chain links with the idea of combining the rollers and pins into one piece.Some times overcomplicating matters is an endless and fruitless endeavor.
Simple is best. The math to work out matching sprockets and links was challenging , but only needed to be done once. I calculated off of easily attainable material, easy to work with material and it appears to have worked out;



To assemble the chain I need to make a long straight run of sprocket teeth. The pin/roller is ordinary .035" Evergreen plastic rod , easy to get and a soldering iron mushrooms the head trapping the links. Traditional , easy modelling solving a delicate problem.
Your welcome.
krow113
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Posted: Tuesday, February 16, 2016 - 10:06 AM UTC
Two tools will have to be made. A long flat run of teeth , perhaps nubbed so two can be pressed together to trap and space the rollers. And a 'tuning fork' shim to allow cutting of the protruding plastic rod to the correct length.


Downside at this point is the obvious oversize of the 'mushroom ' head , starkly shown by the white plastic. I can live with that one. Feel free to point out any other issues.

I'm pretty sure all of this has been done before by another modeller. There is little that is 'new' in modelling.
Thank you ,Steve
krow113
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Posted: Tuesday, February 16, 2016 - 11:18 AM UTC
I put enough time on this to be satisfied it will work. Switching down to .030' rod worked out nicely:


I'll leave this alone for a while and go finish the cannon.
krow113
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Posted: Wednesday, February 17, 2016 - 10:16 AM UTC
Never mind the cannon...
The black strip is 4.5" x .75". Made from the file for the sprockets. Cut in flat black vinyl. 7 or 8 layers will be enough , and then some ledges full width to hold the links, we may have a workable tool:





krow113
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Posted: Thursday, February 18, 2016 - 10:37 AM UTC
I cut a lot of 'flat sprockets' made a cool tool:

Looks real good , a couple of troughs on each side to hold and keep the work parts ready...
All sprockety and everything:

A whole day almost , wasted , yup, USELESS! The links and rollers are so small they fly off at any opportunity. So As I came to the discovery of this vital info , I saw a way to do the tool stealing Tamiya's RC1966 type of tool. I layed out a 'nubbed ' profile, in order to capture the .030" rod:

The layered edges of the vinyl trap the rod as it goes into the hole , holding it firmly. The strips hold the links firmly. Assemble one side , tape it up to hold and flip the jig over to assemble the other side.. It wont be easy.Got a useable , easily made , easily used assembly tool for the APPROX. 8" of Hillclimber cain. Prolly 500 links to be cleaned on both ends , 250 4mm .030" rod pieces to be cut and mushroomed on one end.