Archer Tach Red Arc

does this archer have the standard engine installed?? then I would not think
that there was an RPM limitation.. if there was an STC for a larger or
different engine prop combination, then that may require the red arc area...
and I agree.. this sounds like something from an Arrow with 3 prop blades..
if there is no documentation of the requirement in the aircraft logs.. then
it is an improper marking on the glass face..

BT

"Greg Esres" wrote in message
...
A student has an Archer II that has a red arc painted on the glass of
the tach between 2150 and 2350 RPM. The POH makes no mention of a red
arc.

I'm thinking that either the tach came out of an Arrow (which has a
red arc in this range) or some A&P confused the Archer with an Arrow
and painted it on.

Does anyone know of any legitimate reason for an Archer to have a red
arc, other than max RPM?

On Mon, 17 Jan 2005 19:04:04 -0800, "BTIZ"
wrote:

does this archer have the standard engine installed?? then I would not think
that there was an RPM limitation.. if there was an STC for a larger or
different engine prop combination, then that may require the red arc area...
and I agree.. this sounds like something from an Arrow with 3 prop blades..

I thought you went to the 3-blade to get rid of the red arc, at least
that's what they said in an article on the conversion a few years
back.

OTOH I've never seen a Cherokee or Archer with the RPM range
limitation. Only an Arrow, but are at least two or three of them I've
probably missed:-))


Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com.

Check the FAA Type Certificate Data Sheets for the Pipers.
You will probably find the prop combination liisted with a note
about the tach marking.

If the prop was a result of an STC, it may not be listed. But
I think I've seen new Pipers with tachs like this.

Probably depends on what dampers are on the engine which
would be indicatded by the engine dash number.

Bill Hale A&P

does this archer have the standard engine installed??

I think so.

if there was an STC for a larger or different engine prop
combination, then that may require the red arc area...

I'll have to check the logs.

this sounds like something from an Arrow with 3 prop blades..

I believe that it's the Arrow 2-blade that has the limitation. We
have one with 3 blades that the mechanic says doesn't need the red
arc, but they left it on anyway.

Thanks