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Post by ecbill on Jul 19, 2021 11:05:16 GMT -7
When prepping for the last 2 races, one particular chassis would not make any speed. Tried 3 different mean greens but it’s times were like a stock AW. Chassis was a new gray Wizjet. The last Wizjet I built ran great (not Dave of Jeff great, but great for my shop). It was the blue chassis in Curly’s Gasser.
When spinning the arm by the gear with no magnets or brushes installed, it spun up freely. The entire gear plate seemed free and smooth as well. Magnets are killer bees from Dash. Supposed to equal old blue and white. Tried new brushes, shoes and braid.
Finally I swapped entire gear plates with Curly’s Gasser, and it ran great. Ok, so now we are getting somewhere. Until I ran Curly’s car with the gray gear plate and it ran well too. Ended up giving Curly his gear plate back, then swapped all of the gears and arm to a new plate, for the gray. Got some good speed out of it but times were inconsistent.
All of the gear plate/chassis pan combos had very little to no vertical play in the shaft.
Still scratching my head as to why that one combo was so slow.
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Post by skillet on Jul 19, 2021 15:02:38 GMT -7
It really wants the blue top plate :-)
I would let it have it if curly don't seem to mind.
They have feelings to lol. Sometimes you have to get up close and talk to it.
Give it a little rub and say come on you can do it your loaded with parts,don't be scared.
I was working on a wizzard. 2.8 ohm arm different combinations of magnets and gears,brushes, springs ext.it won't go under a .7 ET ... ummmm the talking is almost over im going to yell at it soon...
Get your but down there!
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Post by ecbill on Jul 19, 2021 18:27:27 GMT -7
It really wants the blue top plate :-) I would let it have it if curly don't seem to mind. They have feelings to lol. Sometimes you have to get up close and talk to it. Give it a little rub and say come on you can do it your loaded with parts,don't be scared. I was working on a wizzard. 2.8 ohm arm different combinations of magnets and gears,brushes, springs ext.it won't go under a .7 ET ... ummmm the talking is almost over im going to yell at it soon... Get your but down there! At the time Curly's Gasser was my fastest gasser and I didn't want to mess it up. Since then, the Dash chassis in the Alley Cat, has come on strong. Curly keeps wheezing all of his Nitros and his Gasser falls flat on the track. Think we could modify a bazooka to launch a grappling hook, so I can latch on the back of Dave's car and take 2nd place? And if he blows a tire.......  . Hate to admit it but, when I talk to my cars, its usually not something very nice.  |
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Post by dave632 on Jul 20, 2021 8:42:17 GMT -7
Bill the only advice I can give is persistence. I have put together 5 identical chassis and got 5 different times
out of all of them. One usually being very quick and one not able to get out of it's own way. Bad words are part of
building HO slot cars and I sure had some for my full size cars to.
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Post by gibbo61 on Jul 26, 2021 8:54:25 GMT -7
I had a hard time with the wizjet I built. My main issue was with the brush holes , the brushes seemed to be " hung -up" in the holes. I t got better after a little reaming but the tension arms seemed hard to get adjusted to where the car had some zip.
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Post by ecbill on Jul 26, 2021 13:11:48 GMT -7
I had a hard time with the wizjet I built. My main issue was with the brush holes , the brushes seemed to be " hung -up" in the holes. I t got better after a little reaming but the tension arms seemed hard to get adjusted to where the car had some zip. A lot of new brushes have a little flash around the edges that cause them to hang up, in the brush holes. Since the problem didn’t seem to be mechanical it is likely electrical. Looking at the tension arms makes sense. Thanks for the suggestion. |
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Post by dave632 on Jul 26, 2021 18:10:07 GMT -7
Bill I noticed you said there was no end play in the armature. I have had some chassis that needed some
relief cut into either the top plate or chassis to eliminate friction where the armature rotates as it
simply was to tight a fit.
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