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Pulling right at 70-75 mph
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Mobilegroomer
Posted 4/12/2004 6:55 PM (#3093)
Subject: Pulling right at 70-75 mph


Member

Posts: 7
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Location: Mississippi Gulf Coast
I'm trying to "fine-tune" a 2003 FLHT/Champion Daytona rig. I think I have it dialed in, but don't have anything to compare it to in order to make sure. Most of the time it seems like it tracks straight, but at highway speeds, it pulls toward the car. It also seems to be greatly influenced by the road's "crown". I've been told two things...1)"these problems are normal", and 2) "these problems are not normal"! (The Daytona is a heavy, two-person s/c.) Thanks from a newbie...!
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JayDauntless
Posted 4/12/2004 8:47 PM (#3097 - in reply to #3093)
Subject: RE: Pulling right at 70-75 mph


Extreme Veteran

Posts: 359
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Location: Covington WA
For this large of a sidecar not to pull at Highway speed they will pull at lower speed. The reason. Drag, You have lots of areodynamic drag.
Best fix order Champions TILT. It is easy to add. This way you can have it set so that it tracks straight at lower speeds and then adjust it with the TILT for what ever conditions you have.
Jay Giese
Dauntless Motors Corporation
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Hack'n
Posted 4/13/2004 2:50 PM (#3105 - in reply to #3093)
Subject: RE: Pulling right at 70-75 mph



Expert

Posts: 4833
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Location: Boise, Idaho
Jay's suggestion of installing the TILT option is your best long term fix. This system also allows you to adjust the rigs trim on the fly, to accomodate for differences in road camber (crown) and sidecar loadings. The electric screw jack raises or lowers the suspension of the car causing the outfit to push left or right as needed to maintain a straight path down the road.

The quick fix compromise is to increase lean-out of the bike and/or increase the toe-in of the car to track straight at highway speeds.

Some have changed the upper struts to turnbuckle type, so they can manually adjust lean-out for an occasional high speed trip down the superslab and readjust for their normal running. It takes a couple of minutes and a stop to do this, but it is an economical fix. Several sidecar manufacturers have used this method through the years.

Lonnie Cook
Northwest Sidecar
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Hacksaw_neb
Posted 7/5/2004 7:56 AM (#4013 - in reply to #3093)
Subject: RE: Pulling right at 70-75 mph



Member

Posts: 26
25
Location: Lincoln, Nebraska
Hello. I only have about a months experience (2500 miles) but I have had to deal with the exact same issue. My rig is a 1970 Guzzi Ambassador with a Big Bore kitted Eldorado motor pulling a 260 plus lb fully enclosed hack with about 10 square feet of frontal area. LOTS OF WIND DRAG. Vern Goodwin in Lincoln, Nebraska setup my rig using 'normal' parameters along with a manual lean-out adjuster and steering stabilizer. After a couple three weeks of having to lean-out to an uncomfortable angle to counter the pulling to the right at road speed (55-65mph) I went back to Vern and said "HELP". After investigation and discussion I decided to sacrifice sidecar tire wear to gain better handling by having Vern put more (much greater than usual) toe-in into the rig. Now I can run up to even 75/80 mph and the rig shows more drag of course but the lean-out angle I have to dial in is almost nil compared to before. As a person who intended to do the setup myself I can only say that I'm glad I left it to a professional like Vern. Also, as he warned be could happen I'M HOOKED!!!
'Drive' Safe,
Hacksaw
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