vereinig wrote:
The compass I rented this past week, which has the V1 drive I believe? also had the leg length adjuster on the bottom of the mast. The Oasis from a few weeks ago had the button on top. I would think a big determining factor would be if it had the reverse option? Roadrunner, I am confused what you mean by leaving it retracted?
This appears to be just a matter of nomenclature.
A
mast is the steel rod that supports the fin. It got its name from the first Mirage Drives when fins were called
sails, and attached at the
clew outhauls along the axis of the
boom. You can see the Hobie sailing heritage here.
The MD 180 "V-2" mast has a screw at the bottom that can be used to vary the length of the mast. The more you screw it out, the longer the mast, and the less twist is possible for the fin. When the fin twists less, a smaller amount of water is vectored out the back at most speeds (but more out the side), so it is not as efficient for most users. As this screw is lengthened you would notice the fins having increasingly more resistance, but without a comparable improvement in speed. At speeds greater than 5 MPH though, it may be appropriate for the fins to flex less due to the higher water speeds -- thus the adjustment.
Crank arms are attached to the pedals and have an adjustments to change the pedal position. Your Compass has a standard crank arm, but your Oasis has the new ARC crank arms that adjust the pedal position with a button on top rather than the squeeze handle on the side. The newest MD 180 Drives are "V-2" and come with the ARC crank arms; earlier "V-2"s and "V-1"s have the straight crank arms.
One of the great features about the Mirage Drive in its various versions is its adaptability to different users and different applications! Learning how to set up your Drive optimally is important if you want to get the most out of it.
