Need data from early B-17 YB/B/C/D Ham-Stan prop stencils

[pokryshkin]

Does anyone have the data stancilled on the Hamilton-Standard propellor blades of the YB-17, B-17B, B-17C, and B-17D ?

I will settle for the information that would go on a B-17E, B-17F, or B-17G propellor blade, set up in the format that was stencilled on the blade next to the Hamilton-Standard logo.

Thank you VERY much in advance. Believe it or not, this is to go on decals for 1/72nd and 1/48th scale B-17B, B-17C, and B-17D models, and the guy I'm working with is using a decal making company in Europe where, using a magnifying glass, you can read the stencils!
This means he HAS to get it right!

You will of course be credited for providing him with the info.

Gratefully,

Dan Katz

[Second Air Force]

I'm working on it, Dan. My photos are a bit grainy but the numbers should be legible with some cleaning up.

S

[DryMartini]

Scott -

Check my numbers:

B-17B reads:
PART NO.6153A-18
A.C. 38-1704
T.O. ???????????
ANGLE 17-88 at 42"
1. 7-21-39

Note that the A.C. and last line vary from blade to blade.
Can you get the T.O. number for the B/C/D?

The Part # and Angle data is confirmed on a blueprint.

[Second Air Force]

Bill,

Here is the data as best I can make it out on my photos. I have two shots of a C model propeller and between the two I found this:

PART NO. 6153A-18
A.C. 40-6140
T.O. 94-10-2
ANGLE 21-88 AT 42"
1. 7-10-40

The Tech Order numerals are REALLY hard to read but I think I'm close on them. The others were legible with the proper magnification.

I have been piling up YB documentation for the model project I'm working on but can't help any there. I'd guess that the Hydromatics had the same data as the earliest B models, but the counterweight props only had a small data stencil that I can't read at all.

Hope this helps,
Scott

[pokryshkin]

Dear Bill and Scott,

AWESOME!!!!

YOU HAVE DONE IT YET AGAIN!!!

I AM WELL AND TRULY HUMBLED BY YOUR ABILITIES AND ACHIEVEMENTS!!!!

Gratefully,

Dan K.

PS - of course you will be credited on any decal sheets!!

[DryMartini]

The C/D/E models had the angles 21-88 at 42".
The Bs were 17-88.

I put together a little diagram. I'll update with the TO,
and post later today.

[Second Air Force]

I still question my numbers on the T.O., Bill. If you fellows would like, I can get the photo to you so you can study it also. Just for grins I blew up the data on one of the B-17F blades from the Amarillo file for comparison.

That Tech Order number is so far off from what I posted earlier that I doubt my first information is even close. I've spent more time with the magnifying glass and would have to say that the "94" on my earlier post is more likely an "02" or "03". I am pretty confident that the other T.O. data is correct. I apologize for the mistake.


Scott

[DryMartini]

Scott,
The stuff I was looking at was pretty
bad, but I thought the TO was 83-???
03 makes perfect sense.

Remember, the B-17F blade was different,
hence the 6477A-0 number.

[Second Air Force]

Scott,
The stuff I was looking at was pretty
bad, but I thought the TO was 83-???
03 makes perfect sense.

Remember, the B-17F blade was different,
hence the 6477A-0 number.

Yeah, I thought my photo showed a 9 , but I doubt the T.O. numbering system would have changed. 03 seems to make more sense for all the Hydromatics.

As for that F photo, I was really only interested in the T.O. data so I threw it up for study.

If anyone has a Tech Order index or key of publications I'd sure like to make a copy of it!

Scott

[pokryshkin]

Dear Bill and Scott,

WOW!!!

HOLY WAUPAKENETT!!!!!

I am humbled, impressed, amazed, dumbstruck!

Or, to put it another way, HOLY COW YOU GUYS ARE [GOOD!!!

Respectfully,

Dan K.

This nails down almost everything anyone ever wanted to know about these aircrafts' propellors: now, if we only had the B-17E propellor stencils......

[pokryshkin]

Dear Bill and Scott,

WOW!!!

I AM HUMBLED, AWED, IMPRESSED, ASTONISHED, DELIGHTED, GRATEFUL, AND TOTALLY BLOWN AWAY!

(To put it another way, BOY, ARE YOU GUYS GOOD !!!!!!!)

Your humble servant and devoted fan,

Dan K.

[Second Air Force]

We wuz jest readin them numbers, Dan!

Seriously, I've spent way too many hours trying to read data blocks, serial numbers, etc. on photos that are just not readable. I keep trying, but even with the new digital technology you can't win 'em all. I spent over ten years tracking down the serial number for an OD B-29 that flew combat with the 462nd Group. I have an original photo that was given to me by the flight engineer's widow that gave me a pretty good idea of the number but didn't confirm it until this summer's trip to Maxwell. Seeing the ship number and nose art name on a document was one of the most fulfilling tidbits I've ever turned up.

Glad we could help!
Scott

[Second Air Force]

I just stumbled onto this photo of a Y1B-17 with Hydromatic props.


I can't date it exactly as the full photo has no caption, but here are the numbers and format that I can make out.

A.C. NO. 38-??10
DWG. NO. 6081A-10
SET MAX. 38.0
MIN. 10.0
INB? 30.0

Here is the full photo of then-Colonel Robert Olds and several 2nd Bombardment Group officers, likely taken in 1938/39.


Still looking for YB and E prop data........
Scott

[Dan Johnson]

Just to add some variety to the party. From the Hendricks Field book. Close up of two mechanics working on a Fort engine. Can't tell if it's a B or and E but the writing on the prop blade seems to show.

Not positive on the last two lines but clearly different then what's been posted so far.

DWG. 6353A-18
A.C. 41-37375
ANG. ??. 0-43R
ANG. TO. 0-43R

[Dan Johnson]

And of course we can't forget "Mary Ann"

A.C. NO. 41-18???
DWG. NO. 6133A-10
MIN. 17AT42
MAX. ??AT42