PA-18 speed indicator markings

[chilecubdriver]

Hello all,

I am buying a new speed indicator for my PA-18 150 and have been asked by Aircraft Spruce to send them a copy of the POH with the speed ranges in order to install the proper markings.

I have a pn 753 568 POH issued 1961 and revised in 1977 and there are no specifics about speed ranges, other than:

- Vy 75 mph
- Vx 45 mph
- Top speed 130 mph (but not Vne?)
- Vstall flaps extended 43 mph
- Cruise speed @ 75% power 115 mph
- Max flap extension 85 mph

The old indicator I'm replacing has the yellow arc starting at 121 mph and Vne at 153 mph, but I can't find that in the manual.

Any help in what manual to find that information?

Regards,

Alex

 

[mvivion]

Alex,

From the TCDS: Vne: 153 Max Structural Cruise (top of yellow) 121, Max Flap extended: 85. All are in mph. Doesn't give stall speed (Vso), which would be bottom of white arc.

Here's a link to the Type Certificate:

http://rgl.faa.gov/Regulatory_and_G...67AFB9AC9E65FBC5862572090071FD4F?OpenDocument

MTV

 

[Widebody]

Has anyone ever achieved 153mph?
If so, what were you doing?

Brad

 

[Darrel Starr]

Also, if your SC has any STCs installed, the critical speeds might change. For instance, the Wipaire 2000 lb STC changes maneuvering speed and possibly others.
Darrel

 

[mvivion]

Brad,

With that O-360 wide open, and pure vertical, you might be able to get to 130....

MTV

 

[chilecubdriver]

Thanks mvivion!

widebody: No never been close to 153mph. I think it can't freefall at that speed.

Darrel: no STC's.

The refurbishment of my PA-18 is almost done. Will post pictures shortly.

Regards,

Alex

 

[spinner2]

Here are the speeds I've got printed on the back of my checklist:

V-SPEEDS

Best climb angle Vx - 45 MPH
(with full flaps)
Best climb rate speed Vy - 75 MPH
Maneuvering speed Va – 96 MPH
Never exceed speed Vne - 153 MPH
Stall clean Vs - 47 MPH (at gross weight)
Stall dirty Vso - 43 MPH "
Best glide speed - NO flaps - MPH
Flap Extension speed - Vfe - 85 MPH
Maximum structural cruise - 121 mph

The missing speed on my list is the Best Glide. Anybody got a number for that?

 

[Darrel Starr]

Our SC when it was still N7167K and had an 0-290 in Sep., 1969, was used as the test plane for Aqua 1900 floats. I have some hand written notes from R. A. Claggett, V.P. of Aqua, that details the test procedure on two pages. This included loading the plane to the aft CG (1760 + 167 lbs, not sure why they used this loading) then they performed stalls, slips, cross wind takeoffs & landings and a dive test to 140mph. Remember the earlier SCs were limited to 138 mph. That sounds pretty thrilling to me. They had a test pilot and an FAA rep.
Darrel

 

[CptKelly]

Well....

My Smith Kit will indicate 135mph at 2700 rpm... full throttle. I tried to keep up with our Cessna 182 last summer, and the Smith won't do it (of course).

Mike