I used to fly my C170B on skis and had a lot of experience flying with my dad in the C180 on skis as well. I flew only off the lakes and never on snow covered fields so only had straight skis. Here are a few things I learned and some tricks to pass along.
* Pack down your parking area and runway with a snowmobile or by taxiing over the area repeatedly. This will freeze the ice better and reduce the dreaded slush overflow that often shows up on lakes especially after heavy snowfalls.
* When warming up the engine at your parking spot apply full flaps. This directs the prop blast down and blows away loose snow.
* Put something under your skis when parked so they don't freeze to the snow. Shake the plane by the wing strut to break the skis free before starting up.
* Taxi with takeoff flaps applied to help get some of the weight off the skis. You will be using considerably more power to taxi than when on wheels.
* Keep your speed up when taxiing in slush. If you get stuck and have a passenger, get the passenger to get out and shake the plane by the wing strut until you can move the plane again. Taxi a few circles around the passenger and then stop on your tracks to pick him up again. Did this lots with my dad.
*Landing on snow on a cloudy day is like landing on glassy water with floats. You can't tell how high you are above the surface. Land near a shoreline if possible and use the glassy water technique.
* Stay away from creek and river mouths on a lake. The ice conditions are usually bad there due to flowing water.
I don't put the C180 on skis, although I have them. The changeover from floats is expensive, the days are short, its hard on the plane (slush, snowmobile tracks, etc.) and generally I just can't justify it . I sure miss ski flying though.
