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Post by dave632 on Apr 22, 2015 9:16:06 GMT -7
30-30 power supply was delivered yesterday.
As expected with lower current draw cars little difference was noticed. With the high power cars however there was a lot of difference. Kept the voltage at just 20 volts but the extra amps were too much for the gears. Ate the gears in the first car on the first pass, heard quite a bit of tire spin on that pass despite level 10 traction mags. Tried a second car and it spun the pinion right off it. Glued it on with the same result. Tried a new pinion with glue and it managed a pass with excessive spin in the early stages. Set a new track speed record, not ET, on that pass. It hit the new foam stop section hard taking the body and body mount off. Chassis was unharmed. Cleaned the tires and tried it again, left better and proceeded to lunch both the Delrin pinion and crown gears after about 1 foot. I have Nylatron and Poly gears to try but I am doubtful that they will hold up.
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Deleted
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Post by Deleted on Apr 22, 2015 9:25:13 GMT -7
time to move up to steel pinions and treated brass crown gears.
dig deep into your purse.
or back down the amperage
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Post by dave632 on Apr 22, 2015 9:41:37 GMT -7
Where can I find those Al?
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Deleted
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Post by Deleted on Apr 22, 2015 10:00:41 GMT -7
Wizzard and I'm sure ScaleAuto/BSRT along with SlotTech.
you might check your favorite online slot shops too.
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lewis
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Post by lewis on Apr 22, 2015 11:17:22 GMT -7
Bsrt doesn't carry brass or steel but wiz does and Slottech. I ordered a set from lucky bobs a couple weeks ago at a decent price.
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Post by dave632 on Apr 22, 2015 18:10:00 GMT -7
Thanks guys I will check that out.
Is the pinion pressed or soldered on?
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Post by dave632 on Apr 22, 2015 19:11:19 GMT -7
Ordered some from Lucky Bobs.
I found out today that the 30 amp supply can outperform the 2 10 amps in parallel even when running the 6 ohm pancake armatures. The 30 amp lane would be about a hundredth or 2 quicker when the cars were swapped from one lane to another. I knew it would effect the fast cars but not the milder ones. |
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lewis
Pro Stock
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Post by lewis on Apr 23, 2015 0:07:36 GMT -7
I use vibratite on mine but I have one that is soldered. I'm probably going to solder the rest I like it better just more of a preference I guess. Al pink can tell you more about building fast cars than anyone. He is the guru and hasn't failed to awnser one single question I have asked. He is a open book. He has probably forgot more than I know lol.
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Post by pceng on Apr 23, 2015 8:43:51 GMT -7
Thanks guys I will check that out. Is the pinion pressed or soldered on? Dave, I've always done what I call sweating (not sure about term). Tin shaft..... then apply flux to shaft and hole in gear and press onto shaft. Then heat end of shaft & outside of gear without applying more solder..... flux may be. Solder will be drawn back that was moved pressing on gear. Inspect gear, and clean up with jeweler's file if necessary. ........ Peter |
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Deleted
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Post by Deleted on Apr 23, 2015 15:36:21 GMT -7
hey guys,
many of the brass and steel pinions for HO can be pressed on with a vise.
any number of different adhesive substances can be put on the shaft before pressing.
when I have soldered pinions on armature shafts for 1/24 motors, I have tinned the shaft, when cool put some more flux on(I prefer liquid acid flux for this assembly), heat the pinion on the flat part of a beveled iron and when really hot press it on the shaft while the pinion is still on the iron.
this process may not be possible with HO ecause the metal pinions need to be pressed on with a vise and that would sink away a lot of heat quickly.
I have not had an HO pinion slip or come off an armature shaft when properly pressed on.
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Post by dave632 on Apr 23, 2015 20:45:40 GMT -7
Thanks for the tips. I have some ordered and on the way.
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lewis
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Post by lewis on Apr 23, 2015 23:43:17 GMT -7
Al that's says all with those little rockets you build lol. I'm working on another wizzard car. For some reason I really like those cars. Its one I ordered before the race I need to get me some wire to rewind a arm I have that's at 1.5 ohm now. I'm wanting to wind it down to a .4 ohm I'm guessing I need to get some 31ga wire. I will let ya know if it works. I will probably have to wind it a few times to get it to run lol. Any suggestions on how many feet of wire I should use.
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Post by dave632 on Apr 24, 2015 17:26:25 GMT -7
I know I saw a wire length for a given ohm reading somewhere on this site. I have done little if any winding myself so I have no idea.
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Deleted
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Post by Deleted on Apr 24, 2015 17:36:33 GMT -7
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Post by dave632 on Apr 24, 2015 18:03:27 GMT -7
Your memory is better than mine Al.
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