weight, anyone doing the new placement ?

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Laserman
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Re: weight, anyone doing the new placement ?

Post by Laserman » Sun Oct 05, 2014 11:26 pm

sporty wrote:Just a update, no sample weights yet from Joe. Ill update and get pictures and so forth. when they arrive.

Sporty
Hi Sporty,

Many apologies for the delay.

I got slammed with work lately but I am on top of things now.

Best,
Joe



davidwilkie
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Re: weight, anyone doing the new placement ?

Post by davidwilkie » Thu Jan 29, 2015 12:44 pm

whodathunkit wrote:
sporty wrote:Anyone got pictures to share ?
Sporty,
I hope this photo helps you out with getting this topic rolling!
Image
Whoda.
Dear Whodathunk,

How did you get those super clean weight chamber cut-outs? Almost looks like a laser!



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Re: weight, anyone doing the new placement ?

Post by whodathunkit » Thu Jan 29, 2015 6:15 pm

davidwilkie,

That one is .. one of the Tornado car body from Derby Evo the laser is nice for alot of things.

Its a little bit harder to make these car bodys useing the scroll saw and a BSA block.
heres one that I just cut out with a scroll saw tonight.
Image


What type of automobile can be spelled the same forwards & backwards?

davidwilkie
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Re: weight, anyone doing the new placement ?

Post by davidwilkie » Fri Jan 30, 2015 2:24 pm

I can't help but wonder if lightening up the main body would be better done with a drill? Instead of large rectangular pockets you'd end up with more of a honeycomb, which would seemingly be a stronger (or rather better use of remaining wood) than narrow strips of wood and large pockets. Said another way, all else being equal -- e.g., if you removed just as much wood with drill holes than with the scroll saw, the remaining structure would be stronger. Might be easier too.



ngyoung
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Re: weight, anyone doing the new placement ?

Post by ngyoung » Fri Jan 30, 2015 3:33 pm

I've considered doing that. Went as far as sketching out two patterns, using 3/8" and 1/4" sized holes, but I never got around to try cutting it out.
davidwilkie wrote:I can't help but wonder if lightening up the main body would be better done with a drill? Instead of large rectangular pockets you'd end up with more of a honeycomb, which would seemingly be a stronger (or rather better use of remaining wood) than narrow strips of wood and large pockets. Said another way, all else being equal -- e.g., if you removed just as much wood with drill holes than with the scroll saw, the remaining structure would be stronger. Might be easier too.



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Re: weight, anyone doing the new placement ?

Post by Scrollsawer » Fri Jan 30, 2015 5:17 pm

Using a drill to achieve an intricate honeycomb pattern that would remove enough weight to be competitive would be pretty hard to achieve, in my opinion. There's a lot of opportunity for torsion-based tear-out with a drill, that could destroy your work in the latter stages of drilling the final few holes. It might work, but for those who have a scrollsaw, the ladder design is pretty easy to do in 15-30 minutes.

If I didn't have a scrollsaw, I'd drill out a lot of holes, then chip out the remaining rough material left behind to make 1-2 large rectangular voids, then I'd laminate top and bottom with balsa or basswood sheets for added support/rigidity.

Scrollsawer.


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Re: weight, anyone doing the new placement ?

Post by davidwilkie » Sat Jan 31, 2015 6:42 am

Scrollsawer wrote:There's a lot of opportunity for torsion-based tear-out with a drill, that could destroy your work in the latter stages of drilling the final few holes. Scrollsawer.
We were thinking drill the holes before cutting the body thin, so that we wouldn't have to drill the holes all the way through (which would seem to lower the risk)...and then cut the body thin on a bandsaw.



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Re: weight, anyone doing the new placement ?

Post by Scrollsawer » Sat Jan 31, 2015 7:42 am

That might work. Still sound like a lot of drilling, but if you can bandsaw several cars out of one block, it might be worth the effort.


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Re: weight, anyone doing the new placement ?

Post by ngyoung » Mon Mar 16, 2015 3:35 pm

I was experimenting with my own washer wheel weights. The washers that I found that have the same OD but a smaller ID where "fender" washers. The ID is only 1/4". I was able to fit a stack of 4 inside the wheel but even with a tight wheel gap the bottom edge stuck out of the wheel and would have rubbed the rail if the car wobbled. Next time I was going to just use 2-3. From what I have read now that the big speed guys have been using wheel weights is maximizing the weight isn't the biggest factor for wheel weighting compared to the aerodynamic effect.

Image
sporty wrote:Image

Image

Image

Image

One washer sitting in there. hard to take a pic and not have it look like the washer is not center. I think this one turned out good.

Image


I'd like to make a mold and make some lead ones.

I do think these washers might be a tad tight, just took a wheel and went to the local hardware store. 15 cents each.

a vender sells a double washer, I got a email out to them, the local store had a display of a double washer, one piece. but only the display and they don't carry them.

17/32, 1/x11/64. not sure the size will work, trying to get a sample to find out. my local store don't carry metric washers, I wanted to look at them too.

These here, as I said, might be a little too big, not sure. id have to build a car and find out.



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