Help please with early aircraft engine possibly 1920s or earlier

Good evening.

I do have a number of Genet’s 1 off the small model and 2 off the size fitted to the Redwing…..I will look and see if I have a instruction book…

P.S

Vintech are rebuilding one of the engines for the Redwing..

Aero Antiques…Civil Aero

Hi Supermarine305

Thank you for the heads up i have just contacted Sheppard 33

Many thanks as this may also help

Just seen that Sheppard33 on post #39 has on offer a instruction book for an AS Genet.
https://forum.keypublishing.com/showthread.php?91762-Original-DH-airframe-Engine-Manuals/page2

Would that be of help?

Hi FLY.Buy

I will email Old Warden tonight
could be a good avenue for advice

Hi Air ministry

Thank you for the advice

Email sent

Send an email to the engineering workshop at Old Warden. As they specialise in this period of aviation they may possibly have some useful information for you.

’66,

The vendor is known to me but I don’t have any contact details.

Why not email the ‘jumble organiser who should be able to put you in touch with him?

Hi John
The only info i have in regard to the previous path of ownership is that i purchased it at Crowland aero jumble earlier in the month, apparently it came from a scrapyard auction, maybe someone on here may even no the seller as he was positioned at the end of the farmyard barn as you look in from the front positioned at the far right corner and was selling some great items.if anyone knows of him please let me know so maybe i can ask him for more details of the purchase that he made, because as John Aerooclub has stated above it may be a path to finding possibly its identity as it would be a shame along with other relics lost in time that have lost this.

Very interesting in regards to that Missel Thrush crashed in Peebleshire during the 1928 Kings Cup, who knows as anything is possible, hopefully i can pursue this with someone elses help.

Many thanks again.

Test photo off new account

John

It might also be a Genet II as the II and IIa were essentially the same as the Genet 1 (65 hp) with the vertical cylinder uppermost, but were more powerful, (80 hp) by having a raised compression ratio.
To add to this list. The Genet II and IIa powered a number of production types such as the Robinson Redwing, DH 60 Moth, Bluebird II and III, Avro Avian II, Westland Widgeon III as well as the earlier II.and some one off’s such as Klemm L.25, and Parnall Imp and the Anec IV Missel Thrush. The Missel Thrush crashed in Peebleshire during the 1928 Kings Cup. A wheel still exists, could this be another relic of the mountain. The sole British registered Monocoupe 60 had a Genet II and was scrapped at Gatwick in 1947.

With little else to go on but the internals, the key to anything else would be to trace it’s sales path. Do you know who the Vendor (you obtained it off) is and if so try to elicit where he got it.

John

Just an update on this thread, i have had the part engine now measured accurately as very minimal difference between between prop centre and gudgeon centre and very difficult to get a true reading, it is in fact Genet 1 as it measures 2 inches across centres.

So it would fit the following aircraft.

Avro 618 Ten
Avro Avian prototype
Blackburn Bluebird I
BFW M.23
Cierva autogyros. C.9 and C.10
Drzewiecki JD-2
Fleet Fawn
Junkers A50 Junior
Medwecki and Nowakowski M.N.5
Saro Cutty Sark
Southern Martlet
Westland-Hill Pterodactyl

Would there be any others to add to this list?

Again thank you for the wealth of knowledge above in tracking down this early aircraft part engine relic that now has a true identity

Hi Creaking Door
Like you say i would imagine that it is pretty rare engine whether its Genet or Mongoose.

The more i attempt to measure from the centre of the prop shaft to the centre of the master rod gudgeon it comes out different as attempting to do this with a rule is difficult to get its true reading, as the gudgeon pin hole is as you can see is slightly covered any suggestions on getting the correct measurement?

It must be quite a rare beast; how many Genet I / Genet II engines were produced?

It is Armstrong Siddeley and I still back my first guess at a Genet 1. or as we don’t have a precise crank throw a Genet II. Both engines were used in many UK light planes, many of which were scrapped during the war and i think that the post war Gatwick dump had some Genet engined types.

It would be interesting to know where your vendor acquired it. Armstrong’s used quite a bit of standardization, for instance the Mongoose, Lynx and Jaguar shared the same cylinder.. A Genet II engined Fleet Finch was stored in a garage on the A.1 at Closterworth. (between Peterborough and Grantham).

John

How similar is that thanks for sending the photo, so anyone have a final verdict or suggestions who to ask for help?

Cheetah balance-weight:

Looking a little more accurate now I have a better measuring tool I would say it’s 2 inches from the centre of the prop shaft to the centre of the master rod gudgeon, sorry for the confusion, so would that make it Genet 1?

Interesting in regards to the Cheetah but I guess they are a part of the same family.

Which would make the stroke five inches; are you sure the throw isn’t 2.25 or 2.75 inches?

Just to throw a spanner in the works the throw is 2 and a half inches
Any ideas?

The way those brass balance-weights are bolted to the crankshaft webs looks a lot like an Armstrong-Siddeley Cheetah balance-weight, but not a Cheetah, obviously!