On Sat, 30 May 2009 10:11:39 -0500, Charles Vincent
wrote:

Veeduber wrote:
On May 29, 3:12 pm, Charles Vincent wrote:

They do have an OHV version I believe. At the RPM's these engines run
at i.e. direct drive prop, I am not sure the L head is that much of a
compromise.
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All of the Pobjoy's were geared, OHV engines. They produced 80hp @
3300 rpm (prop speed of 1400rpm). Weight was 130 lbs.

-R.S.Hoover


I was referring to the HCI Radials which are ungeared. I have seen the
Pobjoy. I have collected everything I can get my hands on with regard
to small radial engines. I have even managed to find factory blueprints
for parts of the Kinner and a Leblonde. No prints sadly for the Pobjoy,
just some contemporaneous technical reviews that do have three views of
the engine. There was a Pobjoy on display in a museum outside San Jose,
but that is a trek from your 20.

Charles

I will post some scanned photos of a sectioned pobjoy on
alt.binaries.pictures.aviation in the near future.

I thought I had cracked the problem when I discovered that the Pobjoy
R was made under licence by Walter as the Walter Mira.
an email to Walter caused some searching among the old retired
employees and one was able to confirm that the tooling and all the
drawings were destroyed in WW2 when the factory was the target of an
allied bombing raid.

bugger the war!
Stealth Pilot