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Old 05-07-2013, 04:32 PM   #1
storch OP
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Joined: May 2008
Location: Vancouver Island
Oddometer: 107
air turbulence

What can be done to reduce air turbulence off the sidecar hitting the drivers head?My present rig(Gl 1500/Hannigan Astro) really rattles my helmet when
faster than 90 km/hr.Previous rig were similar,maybe not quite as bad.Removing the windshield probably would work but it also would remove my wife.
Gary
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Old 05-07-2013, 05:11 PM   #2
MotoJ
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Any way to adjust the height or angle of the screen? Move it forward? I think it's just a matter of trial and error.
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Old 05-08-2013, 04:20 AM   #3
claude
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How much wheel lead do you have?
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Old 05-08-2013, 07:00 AM   #4
storch OP
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turbulence

Hi,Claude ,that is a good question.I do not know how much lead I have on the
GL1500/Hannigan;bought the rig complete.I think the "streamlined"aircraft
style windshield deflects a large amount of air towards the driver.Had less
of an issue with previous rigs(K1100/Motorvation,FJ1100/Kenna;FJ1100/homebuilt).All of those I put in about 350 mm of lead.-I think of putting in a vertical fore/aft panel of Lexan between sidecar and bike.The pompous plastic of the GL does not make it easy to attach anything.
Gary
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Old 05-08-2013, 08:06 AM   #5
jaydmc
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Hi Gary, My staff will be at the lake Chelan rally and my general manager Barry is hosting a sidecar event this year on the island so you can ask us to take a look at your rig and see if we can offer help. While I have never had a Hannigan sidecar on a GL1500, I have owned several GL1500 rigs. I found that a wind deflector on the sidecar made a big difference. I ended up with a deflector about the size of a business card which made a big difference. I had to play around with different idea's for a while before I came up with what worked best. I taped a bunch of short peices of yarn to the bike so that I could watch and see what the wind was really doing rather then guess.
Jay G
DMC sidecars
www.dmcsidecars.com
866-638-1793
2328 Roosevelt ave
Enumclaw WA
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Old 05-08-2013, 10:54 AM   #6
claude
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Good offer by Jay. The question I had about lead is that a little too much can create a wind blast that will go away with less lead. Depending on who mounted the sidecar this could be an issue.
The yarn thing that Jay mentioned can be amazing. To be able to see which way air goes especially within the turbulance between the sidecar and bike ican be an eye opener. If you tape yarn all around some will probably blow in variosu directions and some will spin around and around. Outfits are really not very areo positive. I think th emerlin sidecar may be th ebetter ones out there as far as a complete unit goes as they cover th emount arear completely.
Sorry, for getting off topic above I suppose.
Wind deflectors can be designed easily by taking a piece of cardboard and placing or holding it here and there to see what it may do. From this type of simp0le experimentation a wind deflector can be made from leaxan of aluminum or whatever.
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http://autos.groups.yahoo.com/group/...rsandTrailers/

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Old 05-08-2013, 11:38 AM   #7
usgser
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Don't know about your set up but the wall Ural calls a windscreen on the tub is horrible for directing the wind to the pilot. I'm single so running w/o the screen isn't an issue. If I had to have a screen on the tub I'd go with a Brookland's Aeroflow.
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Old 05-08-2013, 04:43 PM   #8
storch OP
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turbulence

I will be at Lake Chelan with my pimpmobile.Probably will have a meccanoset of lexan scraps along to play on the way.

Jay,when and where is the islnad meet going to be?Can I help any?

Gary
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Old 05-08-2013, 10:39 PM   #9
boxertwin
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Hi Gary,
I hope you are well. I won't be there this year so drink a bit of whiskey for me. I think Jay is onto it (no surprise). The only thing I can add is sometimes with wind blast you don't have to re-direct the whole blast funnel, but just diffuse it, or upset it so it loses its power and direction.

We need pics of the new rig.
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Old 05-09-2013, 03:26 AM   #10
Sidecarjohn
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As with so much about this disease called sidecars, the unique combination of sidecar, motorcycle, accessories, plus the human dimensions of the rider, even pillion passenger, means no definitive solution,
Let's face it, we are basically attaching a container alongside a thoughtfully designed powered two wheeler.
So, dealing with those pesky air flow problems that buffet you, send unwanted draughts and rain up your leg, and totally question your sanity, it's all part of the experience. Enjoy.
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