radial

great pictures!

This is a Wright Cyclone 14 engine, probably for a Douglas A-20 Havoc twin-engined bomber. See also this photo: which must have been taken at almost the same time, but which was mislabeled as showing a C-47 transport plane.

'Dogon' brilliant

It is very disappointing to find, that for at least 70 years a substantial number of Astronomical scholars during that period time in our history, were aware that a North African tribe of people known as the Dogon, carried with them precise astronomical details, not only about the star system of Sirius, but also details of the Earths planetary system, and yet these scholars had made no attempt to publicly acknowledge this fact. These wonderful people had retained this accurate astronomical data For at least 3000 years, and yet none of these details were ever seriously debated by the astronomical societies. These Dogon people were aware of the elliptical orbits of our planets; the moons around Saturn etc, long before Kepler and every other famous scientist were born. For thousands of years the Dogon had named the Neutron star, that orbits the star Sirius, “Digitaria.” One would have thought during some part of our history, as a mark of respect, the astronomical hierarchy would have suggested that the name of this neutron star be changed from Sirius “B” To “Digitaria”. The fact that none of these emeritus scholars made any attempt to do this, speaks volumes about the flaws in their sense of justice. There is no excuse why this long over due name “change” can not now go ahead. I would be very interested to learn how many other people in this forum agree with this suggestion? WARO

The story is indeed fascinating. No doubt various ancient civilisations possessed incredibly "advanced" astronomical knowledge based on countless patient centuries of observation. I'd be interested to know what other people in this forum think of the following pages: www.philipcoppens.com/dogonshame.html www.ramtops.co.uk/dogon.html

Thanks for the picture.. its brilliant...

Hi, I'm an admin for a group called NASA - Public Domain, and we'd love to have this added to the group!

Cool! Cubist!

A complete guess.. but maybe a propeller of some sort... mainly getting that from the right side... None the less, a cool looking thingy :)

Pratt & Whitney R-1830 (?) - It's obviously a cutaway display version of a two row poppet valve radial, but the lack of scale is frustrating. The cooling fins just visible on the cylinder at the center of the image suggest a Twin Wasp, but the rocker cover plates and tapered gear case are unusual. Possibly an early version, as most have bell shaped nose cases. Missing ignition harness is also misleading. Or is it an R-1535 Twin Wasp Junior? Most of these had reinforcing ribs cast into the nose gear casing, but I have seen one picture of a (later?) version without them.

1535 methinks, only missing the cooling plates between the cylinders. the two rows of cyl appear 'nested' as only i have seen on the 1535 in our basement.