Unusual Air Speed Indicator

[aseanaero]

Can anyone identify this air speed indicator ?



What's unusual about it is the outer scale reads 0 to 99 knots and then it has an INNER scale showing hundreds of knots , never seen anything like it




BENDIX - PIONEER
PN 1432-22-K-A-3

[Forgotten Field]

Read the face- says Air Forces US Army Type F-1. Used on several aircraft during WWII.

[airnutz]

Read the face- says Air Forces US Army Type F-1. Used on several aircraft during WWII.

FF...Dewd, one of your airspeed indicators is mislabled. Item 3158 is listed as an F-1, but the photos for it
show an F-2A. just being helpful..

[aseanaero]

Under the hundreds of knots indicator it reads H14-22B (white lettering)

Above 'KNOTS' it reads

A.F.U.S. ARMY
Type F-1

Correct

Originally the indicator was calibrated in MPH (lettering blacked out) but now changed to KNOTS

Which aircraft used these ?

[Eric Presten]

I don't know what type of airplane it is for, but if it really works at less then 50 MPH, I would love to have it for my airworthy 1946 SGU 2-22 glider. Mine does not work below 50 mph, and the cruise speed for the glider is 32 mph.

[B29Gunner]

Which aircraft used these ?

This is the ASI used in B-29's, although I can't say which other A/C it would be "correct" for (I have seen them in B-24's though.) The "KNOTS" decal would indicate a post-war application of some sort. Hope this helps!

[plankwings]

I have come across 1 or 2 of these fitted to pitot/static test sets.


Wayne