On Mar 20, 1:03 pm, "JGalban via AviationKB.com" u32749@uwe wrote:

One of the reasons for the very narrow envelope in the Cherokee is that the
spin tends to flatten pretty dramatically as the C.G. moves rearward. Even
in the utility category, I can feel the spin flattening after the 3rd or 4th
turn, when the C.G. is up against the rear limit in the U.C.

Most early model (pre '73) Cherokee 140s and 180s are approved for
intentional spins. The exceptions are models with air conditioning, or the
big fresh air fan in the tail. Any of the post '73 stretched fuselage
models (Challengers, Warriors, Archers, ...) are prohibited because the
stretched fuselage and the much larger stabilator moved the C.G. too far back.

Originally, some of the stretched '73 models were released with placards
and manuals that indicated that intentional spins were approved. After Piper
caught on that the C.G. change was just too much, an AD was issued to
rescind spin approval (removing placards and manual entries) for all of the
stretched models. The lowly 140 kept its spin approval until they quit
making it in '77.

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


I haven't flown a 140 in a long time -- are they still spinnable?

(There's one for sale locally)

What did you do to get the airplane in a condition where the "C.G. is
up against the rear limit in the U.C?"

Seems to me if you were heading out to do spins you'd want no more
than two people (both up front), nothing loose in the airplane, and no
anvils in the baggage area.


Dan Mc