Large Scale Central

Hancock 4700 Air Whistle in Fn3?

Modeling
#1

I’d like to change the whistle sound on my GE 45 Ton diesels to a Hancock 4700 Air Whistle. The sound part is easy, but the stock single bell air horn wouldn’t look right with the Hancock sound.

If I had some bits that would work, I’m not opposed to scratching one up myself, but if there is a 3D print file out there I’d prefer to go that route since I’m lazy! I did try and find prints with Google with little luck.

If you are not familiar with the 4700, this Youtube video will be my source to create a set of RailPro sound files from…

Any suggestions of what bits I might use to fabricate the bell from, or a source of a 3D print file would be appreciated.

#2

Looks like you could start with the cap from a plastic tube like:
31mJURbaZZL.AC
angle cut the cap and add your tube center

Now if you could just put the speaker in the round rod facing the rectangular bell you,d have a great piece. :sunglasses:

#3

This will be a simple 3d drawing, just need measurements and i can do. see my PM

AL P.

#4

Good suggestion Hollywood. I need to look for something like that!

#5

Purely swag for now. i know there is a mounting flange.
like i said simple to model.

hancock

Al P.

#6

Just so happens there was a guy at the RHS that had printed that. Unfortunately, I don’t remember who but I remember commenting on the phallic resemblance. Someone else was there at the time. @John_Wilda was it you? Do you remember who this was?

#7

Here is the back in good detail…

734671__15526
734671__15526608×608 64.9 KB

Still working on dimensions.

#8

The patent drawing…

Hancock 4700 Drawing
Hancock 4700 Drawing526×877 64.1 KB

1 Like
#9

Yeah, wasn’t that the guy who said he knew you? I still can’t remember his name. That was our conversation on Saturday. Nice guy.

#10

I think I found it! Pretty sure this was the guy I spoke to at the RHS who showed us a printed sample of his design.

image
image684×843 46 KB

#11

You don’t want that Jon. You want Fn3 Nathan K-5LA’s!

#12

Yesterday i drove down to the museum and measured the real deal. I have now modeled this up in full scale so i can print in any reasonable scale.

HANCOCK REAR
HANCOCK REAR683×665 41.7 KB

HANCOCK FRONT
HANCOCK FRONT674×617 37.9 KB

Running a test print shortly in 1:20.32

Al P.

2 Likes
#13

image
image354×505 43.5 KB

Hancock made a 3 bell steam whistle and other types for the steam era trains. Kept themselves busy making those air whistles when steam fell away to diesel. I found out in the 18th century steam whistles were first used as a low water warning in the factories running steam. They found many uses after that!

#14

Curious if you could rescale this drawing to 1.6 scale? I’m going to have it cast in bronze for a gp7 I’m working on. Thanks. This drawing is great.

Kevin