Manky Monkey Motors

Technical Section => Trike Tech => Topic started by: tony b on October 24, 2008, 12:12:08 PM



Title: prop length
Post by: tony b on October 24, 2008, 12:12:08 PM
how long is the prop on one of mankys trikes approx,anyone know


Title: Re: prop length
Post by: harley gazz on October 24, 2008, 12:34:35 PM
normally ya fits ya prop after you have done frame to what length ya want  and then mates it up to the axle once engine and box is  all fitted in ,premature cutting of prop could lead to slight hicups methinks  ;) just my tenpennith worth as i know nuffink  ;D


Title: Re: prop length
Post by: tazet on October 24, 2008, 03:59:04 PM
As Harley Gazz said you make the prop fit the trike. If you look on my trike thread we have roughly done the frame and haven't even started on the prop but when it is done it will be about 8 inches I think. I'll go and measure the gap now.


Title: Re: prop length
Post by: tazet on October 24, 2008, 04:07:18 PM
Yup just as I thought, just a fraction over 8 inches gap for the prop.


Title: Re: prop length
Post by: mouse on October 24, 2008, 08:06:17 PM
good job you ain't a fisherman taz that 8 inch could be a foot  ;D ;D


Title: Re: prop length
Post by: tazet on October 24, 2008, 09:04:07 PM
I measured is so I know it's right  :P I think Flaps one is 9"


Title: Re: prop length
Post by: mouse on October 24, 2008, 09:05:04 PM
hehehehehehehe ;D


Title: Re: prop length
Post by: Manky Monkey on October 24, 2008, 11:36:57 PM
That's what he always tells 'em.  :o

-trust me, it's not.  ;)


Title: Re: prop length
Post by: harley gazz on October 25, 2008, 02:37:38 AM
hehehehehehehe ;D
always someone with a longer one  ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D ;D


Title: Re: prop length
Post by: tony b on October 26, 2008, 10:11:43 AM
i was thinking of bolting the prop straight onto the box,would this work.


Title: Re: prop length
Post by: Manky Monkey on October 26, 2008, 10:59:34 AM
I'm assuming you're building a hardtail? -with a swinging arm frame the prop obviously needs to be able to move with the suspension travel. Even with a hardtail, there's a certain amount of vibration from the engine & flex in the frame. I'm no expert but I wouldn't recommend a solid prop -one without universal joints. Check the thread on SaddleBags' trike build, (Vauxhall Chevette auto), & you'll see he used a rubber "donut" in place of the UJs. Basically a big rubber block in the middle of the prop that can soak up any movement. If your solid prop runs even slightly out of true it'll bugger up the bearings in your gearbox & diff.
The shortest prop I've done was literally the 2 UJs welded back to back. There's a limit to how short you can make your hardtail anyway, as you need room to sit on the thing!  :)


Title: Re: prop length
Post by: tony b on October 26, 2008, 12:40:53 PM
never mind ,it was just an idea.bugger it ill use as short a prop as i can.


Title: Re: prop length
Post by: VALLEYSBOY on October 26, 2008, 01:04:16 PM
Tony id make the jig/frame 1st m8 as it been mentioned above youwont know the exact length until axle/gearbox/engine are set in there places :) its alomst lke trying to work out how and where the gearstick will go before the frame's in place :)


Title: Re: prop length
Post by: tony b on October 29, 2008, 10:40:20 PM
i thought the gearstick went in the box.