On Tuesday, July 27, 2004, at 10:32  PM, Peter Bancroft wrote:

>>>  I thought about a moving average but I don't know how to do that.
>
> Sum the last point with the new point and divide by 2. Works on flat
> surfaces only.
>
> Peter
>
> --
>

Get an elevation map from the GSS and plot your points on it, factor in 
verticals using basic trig, and give up on having a perfect outcome.

Otherwise, get an Altimeter, and use that as you drive, at each plot 
point, note the altimeter, note the vertical...and feel like an 
airplane.

Don't stall. A low wing plane may be landing on top of you, and if you 
are in a Cessa, that's not cool, you won't be able to see him. Same 
pertains to meteors on perpendicular vectors for your head. And 
remember, when going around in a Cessna 172 because of a bad PIO, don't 
dump all the flaps at once, because you'll make a nice boingy boingy 
when you splat down that one last time before you crawl into the air 
while the tower guys have a good laugh, and the restaurant people run 
for cover. So, that's 20, not 10. And when taxiing, take off the 
emergency brake. And don't take off on one magneto after the runup 
check. And make sure you have the throttle friction screwed down, 
because otherwise that baby can back off during the takeoff, and now 
you have 50 percent power on the climb out, when you need 100.

Remember also, if pulling the carb heat out during the turn to 
base...and the cable comes out all the way...that it's best to not 
panic. Unless you need to do a go-around...and now you won't get full 
RPM.

GPS sure is great ain't it? :)

rc