when to run up and check the prop

same thing happens on floats and a water take off..

"John Galban" wrote in message
oups.com...

Friendly Skies wrote:
snip
Their
rationale is that doing it four or five times a day is unnecessarily
hard on
the engine and when its been flown in the last few hours there's no
need to
cycle the prop more.

I don't see why a runup or a short prop cycle should be unnecessarily
hard on the engine. If they're stopping that many times a day, they'll
get the procedure down to a few seconds.

In the backcountry, where there is often no place to runup without
sucking rocks into the prop, we often do the mag check early in the
takeoff roll. It's an extra step during a critical phase, but I
always feel more comfortable rolling towards the trees and rocks at the
end of the runway when I know all of the plugs are firing on time.

John Galban=====N4BQ (PA28-180)

"BTIZ" wrote in message
news:39Yee.11385$fI.8996@fed1read05...
same thing happens on floats and a water take off..

Hmmm...I don't do my runup during the takeoff, even on the water. It's
true, I have no brakes and so the runup involves getting the airplane
moving. But once the runup is completed, I reposition myself for takeoff.

I can see that there are situations when doing the runup during the takeoff
would be useful and beneficial, but a water takeoff in a seaplane doesn't
seem to me to be one of them. Why complicate the takeoff unnecessarily?
(In John's example, the complication is necessary, but not so for a water
takeoff)

Pete