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Olds
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« on: October 05, 2015, 05:34:17 PM » |
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Got a bit of a problem with the prop on the speedster.
It's too long !
Not a lot, but it won't fit. The engine and gearbox were positioned with minimal clearance on the prop while it was on it's wheels. Now the springs have been arched and with the vehicle suspended the prop is 6mm too long.
I can only come up with three ways around this.
1. Have the prop shortened by 10mm
2. Move the engine and gearbox forward.
3. Move the axle back on the springs by 10mm
Any suggestion or advice? At the moment I am favouring number 3
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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lunatic
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« Reply #1 on: October 05, 2015, 05:37:34 PM » |
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I'd go for number 3 also.
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spanners
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« Reply #2 on: October 05, 2015, 06:29:04 PM » |
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what happens when you add a bit of weight ,, how long is it going to be before the springs settle a bit its all youre own fault  youre engineering is tooo precise  |
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LIVE FAST and DIE YOUNG,, past 50 AND STILL HERE NOW. WAITING. FOR. THE. GRIM. REAPER
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stinkey
Hero Member
Karma: 93
Posts: 2757
I can't stop building stuff ?,but I'm slowing down
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« Reply #3 on: October 05, 2015, 06:50:14 PM » |
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I'm sure with your skills you can do the propshaft and have it rebalanced ?
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Backyard hotrodder,learnt by mistake,still learning ?
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No Sound
Full Member
Karma: 3
Posts: 177
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« Reply #4 on: October 05, 2015, 06:56:06 PM » |
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1 or 2 because then its right.
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Olds
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« Reply #5 on: October 05, 2015, 07:24:49 PM » |
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Moving the engine and box forward would not only require new mounts but some new body panels and relocating the radiator. It really is that tight up front.
Shortening the prop is possible. Though unlike the trike prop, it is far too big to get into my lathe.
Doesn't really matter what happens when a bit of weight added or the springs settle. With the way I drive, there will likely be times when the back end is, "unloaded" and I'd prefer that the output shaft of the gearbox, didn't have to support the axle. I suppose I could add check straps.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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lunatic
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« Reply #6 on: October 05, 2015, 07:40:46 PM » |
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Skim 3mm off each of the mating surfaces?
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Olds
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« Reply #7 on: October 05, 2015, 08:10:24 PM » |
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Good idea but the flanges are not thick enough. The prop end is only 5.5mm thick to start off with. I could possibly shorten the gearbox output shaft.  |
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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hunter
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« Reply #8 on: October 05, 2015, 09:00:33 PM » |
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Could you just cut the flange off freehand tight to the weld,
Then turn the weld off the flange refit and weld.
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I
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Olds
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« Reply #9 on: October 05, 2015, 09:17:51 PM » |
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It's the yoke I will have to cut off and I'm not sure how I'd get that held in the chuck.
Managed it with the trike prop by having a short length of tube left on untill I'd machined off the weld.
Looks like it's already been modified once before.
May look for a Minor prop to play with.
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« Last Edit: October 05, 2015, 09:20:15 PM by Olds »
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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kapri
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« Reply #10 on: October 05, 2015, 09:23:51 PM » |
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Hacksaw or 1mm cutting disc AROUND ( not through) and there is a plug that will pull out . You can then remove the amount you need , slide it back in, make sure the phasing is correct and weld up, should all be self aligning with no balance issues ( but only if done at the back).
The sliding joint in the back of the box shouldn't be fully home as when the rear suspension unloads , say over a bump, it cna wreck the tailshaft . Joint is normally in something like 2/3 or 3/4 of the joint length but there is normally a witness mark.
Hope I'm not 'teaching Grandma' but use to sell props for a living and so went specific training courses.
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Manky Monkey
Administrator
Hero Member
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« Reply #11 on: October 05, 2015, 09:48:33 PM » |
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You were a propshaft salesman?! How does that work then Kev? Did you go door to door or is there some sort of mail order catalogue?
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On the last freedom moped out of Nowhere City.
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stinkey
Hero Member
Karma: 93
Posts: 2757
I can't stop building stuff ?,but I'm slowing down
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« Reply #12 on: October 05, 2015, 10:06:42 PM » |
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I think Kev may show you where to put your propshaft Andy ?  ..he.he |
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Backyard hotrodder,learnt by mistake,still learning ?
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Olds
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« Reply #13 on: October 06, 2015, 07:10:47 AM » |
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Hacksaw or 1mm cutting disc AROUND ( not through) and there is a plug that will pull out .
Unfortunatly Kev, this has been done once before. If I remember correctly, the plug or spigot is only 1/2" long. Judging by the width and position of the second weld, I don't think that there will be much spigot left to locate back into the tube, without machining the yoke to remove the old welds. Hence the thought of looking for another prop, where it might be easier to do as you suggested. |
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
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hunter
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« Reply #14 on: October 06, 2015, 07:59:35 AM » |
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What about the other end.
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I
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