From:Doug Strange
Subject:RE: RE: RE: RE: Henderson Engine Date:Mon Aug 21 20:47:21 2017
Response to:6665
The coolest piece from the archives was a 1912 drawing of
the complete '12 Henderson. Bill Henderson had penciled in
the lines of the 1913 model over the drawing of his first

Somewhere in my files is a letter Bill Henderson sent to a
period magazine, around 1911, where he asked for a critique
of his proposed new motorcycle. While the lines of the
machine were similar to the 1912 production bike, the frame
was quite different and appeared weaker. I think it was
also belt drive.

Many moons ago when the AMA museum was in Westerville, Jim
Rogers the curator was planning on a Four Cylinder show. I
advised him about the prototype Henderson in the Chicago
museum. We got that bike on loan. The Chicago Museum
received the bike from Schwinn in 1931 or so. They only
valued the Henderson for a couple hundred dollars for the
loan. May I buy it please?

One last note. A friend in Holland said he had a Henderson
blueprint for sale. I told him I'd be interested and he
gave it to me around Christmas. It was for a manifold and
looking at it I knew it wasn't Henderson but for the
experimental Schwinn Model O in 1917, prior to Schwinn's
acquisition of the Henderson brand. Now that's cool.

I envy you, Doug, to have seen the Excelsior "scriptures".
It is near criminal that the AMA has locked those documents
away, and apparently, with no plans to reproduce them. I
quit the AMA when they lobbied to open federal land to dirt
bikes, and ATVs. I've seen too many squashed turtles, and
dead mammals from human intrusion. In regards to Henderson
engineering documentation; I believe much of that was
destroyed, and what did survive was scattered to the winds
when the Schwinn family lost interest in motorcycles. Back
in the mid '90s, many original Ex/Hen linen drawings hit the
AMCA swap meets. Nothing earth shaking, but still great
stuff. I spoke at length with Joe Koller about that stuff,
as he knew Blackie Schwinn. He said the damage had been done
many years earlier when it was just junk, and clutter and
Schwinn needed the space for bicycles, and then WW2
contracts. As for 1919 stuff. I have a Z2 Hen, and even in
it's day, I think Schwinn considered the Zs to be the red-
headed step child that he did not want. Hence, Z2s were put
together as a stop gap to the model K and engineering was
done on the floor via expedience, and need. Why bother with
a product that was obsolete in 1918? I would be quite
surprised if (even in 1919) there was any detailed
documentation of the Z2 Henderson, other than the minimal
changes (i.e cylinders). For the record, the 1919 is my
favorite Henderson because it was so dismissed by Schwinn,
but still improved by Schwinn, and probably was at the acme
of it's inherited Detroit DNA.

You are correct. I was in the AMA when these came in and
able to go through the drawings and literature. Kid in a
candy store. Unfortunately, getting cooperation from the
can be difficult.

I seem to recall all the original Schwinn library went to
AMA Library in Ohio

Hi, does anyone have
Construction drawings, 1919 he Henderson motor? with
dimensions? Greetings