BMW K bikes (Bricks)

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1Back to top Go down   Screen Help Empty Screen Help Sun Oct 21, 2012 4:40 pm

Hover K100

Hover K100
Silver member
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I want to replace the screen on my machine and I know it has no wheels but maybe somebody on here has some ideas.
On a bike how high is the top of the screen relative to eye level?
Do additional bits to flow the air over the rider work? My speed is around 30-40mph
Whats the best shape to stay dry?
I will probably use 3mm Lexan to make the new screen. The present one got scratched when I got a tow from this: https://www.youtube.com/watch?v=szxpitM3vgo&feature=plcp
Good thing he didn't turn on all 1700hp!!!

https://www.youtube.com/user/HoverIreland?feature=mhee
    

2Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 4:49 pm

charlie99

charlie99
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crikey hover ....were you waterskiing behind that thing ???

oops

3mm lexan might not be enough ....but at lower ks could work out ok i guess

mouth height seems to work , but you need something to kick the air up ....other wise i would be going for eye height ,,,or just below


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OScreen Help Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

3Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 4:58 pm

Hover K100

Hover K100
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3mm is ok as the screen is curved and the speed is low. Something to kick the air up? A curve or additional parts?

Ooops forgot to mention the craft was er........... er ..........umm........... inverted(nice word) Embarassed Embarassed and the engine under salt water for a few hours Crying or Very sad Crying or Very sad

https://www.youtube.com/user/HoverIreland?feature=mhee
    

4Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 8:17 pm

chrish8846

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I think it would have to be at least eye height because even with a lip at chin level you get air at eye level. 3mm is going to be ok and considering your last antics I would back it up with a roll cage!!


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Chris Hammond
1985 K100 RT sold
1992 K75RT still in Fixing mode
    

5Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 8:34 pm

RicK G

RicK G
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@Hover K100 wrote:3mm is ok as the screen is curved and the speed is low. Something to kick the air up? A curve or additional parts?

Ooops forgot to mention the craft was er........... er ..........umm........... inverted(nice word) Embarassed Embarassed and the engine under salt water for a few hours Crying or Very sad Crying or Very sad

Hmmmm and some talk of bikes being unstable. Rolling Eyes


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

6Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 8:39 pm

rosskko

rosskko
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You haven't been scaring those pesky rocks again have you?

Upside down in salt water for a few hours eh.
I hope you managed to shut it down before/ during the rolloverflip.
Do hovercrafts roll over or just flip? I am going to say flip.

I know it is all about priorities, but I guess someone has to do it.....Hope you weren't hurt in the 'incident'
rossco


__________________________________________________
1986 K100RT VIN 0093801K100RT with summer fairing for a northern visitor

Basic/2 6308802K100CJ  05/1988

K1100RS 0194321
    

7Back to top Go down   Screen Help Empty Re: Screen Help Sun Oct 21, 2012 8:49 pm

Crazy Frog

Crazy Frog
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@Hover K100 wrote:Ooops forgot to mention the craft was er........... er ..........umm........... inverted(nice word) Embarassed Embarassed and the engine under salt water for a few hours Crying or Very sad Crying or Very sad

Saxon is a very bad mentor. This is not the easiest way to replace the oil filter on a K100 engine (even on an hovercraft).
Robmack may loan you his engine stand

Unless you get a wind tunnel, it will be tries and errors.
One of the feature of the K100 electric windshield is that it has an opening at the bottom to balance the inside/outside wind pressure.

If the wind is only deflected upward, it will create a down draft on your back. You may get a wet bum Very Happy

CF


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Screen Help Frog15Screen Help Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

8Back to top Go down   Screen Help Empty Re: Screen Help Mon Oct 22, 2012 6:19 am

K75cster

K75cster
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Hover it is a complicated question to answer as not many of us have riden one but on our bikes it usually comes down to the angle of the screen, if it runs straight back at you from high infront of you then it needs to be eye height as the wind is not lifted much with a flater type screen but if its a steep screen then it falls into the how far infront of you it is department, and in that case it is usually a case of having it just far enough infront of you to be able to, when extending you're sit position, you can just see along the top of the screen to the base say where it bolts onto the fairing, then as you settle into your normal pozzie you get that wind travelling up the screen and the spill it has is somewhere just over the helmet, or just into the top of the helmet and you can tuck in a little to get out of the noise, mind too much tucking leaves you aching at the end of the ride, so as I said complicated to get just right. My R100rt fairing on the k75 required a 540mm screen to set me up right. I bought a 600 screen and set it on blocks at the front to let in some air only 12mm gap but worked fine. mind I wasnt going to headbut that screen as often as you may on your craft if playing in rough water, so you may know better than us how close you can go with it.


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

9Back to top Go down   Screen Help Empty Re: Screen Help Mon Oct 22, 2012 6:23 am

Guest

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[quote="Crazy Frog"]
@Hover K100 wrote:Ooops forgot to mention the craft was er........... er ..........umm........... inverted(nice word) Embarassed Embarassed and the engine under salt water for a few hours Crying or Very sad Crying or Very sad

Saxon is a very bad mentor. This is not the easiest way to replace the oil filter on a K100 engine (even on an hovercraft).
Robmack may loan you his engine stand



Screen Help 652573

    

10Back to top Go down   Screen Help Empty Re: Screen Help Mon Oct 22, 2012 7:51 am

88

88
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Viz a viz staying dry the screen looks plenty wide in the pics and vidz. It's probably going to be more about height - a little laminar lip on the top would probably help a lot. You could try mocking up one out of an old helmet visor or strip cut off your stock sheet.

It looks like you need a bit of a curve too I have no experience of bending anything other than perspex and a hair dryer will work better than a heat gun which can dmage the plastic (ask me how I know Screen Help 652573 ). Maybe someone else will come along with advice on lexan or other acrylics.

88



Last edited by 88KE on Mon Oct 22, 2012 7:52 am; edited 1 time in total (Reason for editing : add text)


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Screen Help Ir-log11 88....May contain nuts!Screen Help Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

K1100LT 1992 - AKA Big Red
K1100RS - 1995. AKA Rudolf Von Schmurf (in a million bits)
K1/RS - AKA Titan (unique hybrid by Andreas Esterhammer)
    

11Back to top Go down   Screen Help Empty Re: Screen Help Mon Oct 22, 2012 9:42 pm

K75cster

K75cster
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peaking of old visors an old helmet can give you the buttons to attach the visore to, and then you have something attachable to go test 3 or 4 small holes to hold the visor on or you can just use 100mile an hour tape to stick it inplace and try it, its a starting point?


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

12Back to top Go down   Screen Help Empty Re: Screen Help Mon Oct 22, 2012 10:24 pm

RicK G

RicK G
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Just make a big perspex bubble right over the top and it will look like George Jetsons space car and it will float upside down Screen Help 44271


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

13Back to top Go down   Screen Help Empty Re: Screen Help Tue Oct 23, 2012 3:25 pm

Hover K100

Hover K100
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Silver member
Thanks for the tips, I think my speed may be to low to get some of the more normal bike things to work but I'll give them a try. The present one is now way too low as I've changed the trim on the craft to keep the nose lower.
I'm trying to not look like a Honda 50 screen from the 70's.

Rick G, I'm searching for a pic of an American craft that might suit you Very Happy

https://www.youtube.com/user/HoverIreland?feature=mhee
    

14Back to top Go down   Screen Help Empty Haire-braned ideas Wed Oct 24, 2012 4:30 pm

GerryP

GerryP
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I went through an exercise a few years back using a K75 with the BMW low seat option.

In an attempt to find a good screen height I fitted an old screen and sawed it down by an inch a time (riding it between times, changing the angle on the move etc.) I wound up with something quite wide and low 15" x 9" and raked back at about 30deg from vertical. The bottom of the screen was about 3" above the clocks giving some airflow underneath the screen.

This took the strain off my arms, put the turbulent air from the top of the screen below the bottom of my visor - though it did look a bit strange :cyclops: it worked very well.

I suppose my advice would be, start too tall and shorten it a bit at a time.

If you have a problem with spray over the (front, bows, nose, bonnet or whatever else it is that hovercraft have) you could look at rain/particulate separator designs for jet turbine intakes. Not sure that could be made to work at such low speeds.

um... one more - how about bleeding some air from the skirt and running it up a short screen, some prototype sports cars have claimed to make that work Screen Help 8157



Last edited by GerryP on Wed Oct 24, 2012 4:48 pm; edited 1 time in total (Reason for editing : If he had a brain he'd be dangerous...)


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Safe riding Cool,
Gerry Parnham


K1100LT (1993) in Silk Blue/Cream
http://gerryparnham.com
    

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