Author Topic: Bristol Hercules sleeve valve radial engine plans drawings  (Read 15998 times)

Offline Vixen

  • Full Member
  • *****
  • Posts: 3159
  • Hampshire UK
Bristol Hercules sleeve valve radial engine plans drawings
« on: January 22, 2022, 11:21:06 PM »
This is a long shot.

Does anyone know the whereabouts of a set of drawing/ plans for a fourteen cylinder Bristol Hercules radial engine. I have been given a part built engine but not the drawings. It's 1/4 scale and a big impressive engine

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline steamer

  • Global Moderator
  • Full Member
  • *****
  • Posts: 12728
  • Central Massachusetts, USA
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #1 on: January 22, 2022, 11:49:00 PM »
that sir is a shame...No I do not have any references at all for that engine.

Dave
"Mister M'Andrew, don't you think steam spoils romance at sea?"
Damned ijjit!

Offline john mills

  • Full Member
  • ****
  • Posts: 425
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #2 on: January 23, 2022, 06:28:04 AM »
that would be an impressive engine i only have a picture of that engine in a book one view of the cylinders and one of the complete engine.
john

Offline Jasonb

  • Full Member
  • *****
  • Posts: 9550
  • Surrey, UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #3 on: January 23, 2022, 07:13:17 AM »
Steve W did mention that they had some in his post about these which may have gone with the other engine to the RR Heritage Trust

"The collection of drawings however is far from complete, those we have seem to have been scaled directly from FB's originals"

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 15326
  • Hampshire, england.
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #4 on: January 23, 2022, 07:40:54 AM »
The obvious person to ask would be Eric as he has, or had, a hoard of full sized drawings of various engines in his collection.

The next option is to try the various aviation museums. I will be seeing the archivist for the Farnbrough Air Sciences Trust Museum tomorrow I will try to remember to ask him.

Edit: This isn't the one is it? https://www.ebay.co.uk/itm/373889560306?mkevt=1&mkcid=1&mkrid=710-53481-19255-0&campid=5338722076&customid=&toolid=10050

Jo
« Last Edit: January 23, 2022, 07:51:55 AM by Jo »
Enjoyment is more important than achievement.

Offline wirralcnc

  • Full Member
  • ****
  • Posts: 63
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #5 on: January 23, 2022, 08:45:31 AM »
Mike
Some photos of the engine would be awesome. Do you know any details of the engine? Was it ever built from a known set of plans? Ageless engines have plans for sleeve valve engine but will not sell plans.
https://www.agelessengines.com/sleeve.htm

Offline Jasonb

  • Full Member
  • *****
  • Posts: 9550
  • Surrey, UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #6 on: January 23, 2022, 10:32:42 AM »
A bit more in this thread on ME. I think we can all guess who I was talking about in my post.

https://www.model-engineer.co.uk/forums/postings.asp?th=176536&p=1

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 15326
  • Hampshire, england.
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #7 on: January 23, 2022, 11:33:20 AM »
 :pics:

Jo
Enjoyment is more important than achievement.

Offline Vixen

  • Full Member
  • *****
  • Posts: 3159
  • Hampshire UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #8 on: January 23, 2022, 11:34:04 AM »
Steve W did mention that they had some in his post about these which may have gone with the other engine to the RR Heritage Trust

"The collection of drawings however is far from complete, those we have seem to have been scaled directly from FB's originals"

Jason, I have copies of those drawings. As SW said, they are far from complete, maybe 10%? There are not even drawings of the crankcase or cylinders to complete them.

Jo, Is Eric answering e-mails these days? My ears are now so bad, I no longer use the phone.

Corporate RR have taken control of the Bristol Heritage Trust and made big changes. The army of volunteers who preserved the engine collection were told to collect their personal tools and depart. I am a life time member of the Trust and can no longer access the archives.

I have a similar CD copy of a handbook on it's way to me. I will see what it contains, A side view section, showing the lubrication system, at least.

Robbie, I contacted Lee at Ageless Engines. His sleeve valve engine is loosely based on the Hercules. He cannot get it to run and has wisely withdrawn it from sale.

Here is a photo of the part built engine. Workmanship of the highest order, I think it was professionally built in a tool room. If only there were more drawings



This is a photo of a full size Hercules being rebuilt



No wonder the Bristol Hercules as called "The Swiss watch which produced 2000HP"

I'll keep looking

Mike
« Last Edit: January 23, 2022, 04:01:04 PM by Vixen »
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 15326
  • Hampshire, england.
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #9 on: January 23, 2022, 11:36:51 AM »
Jo, Is Eric answering e-mails these days? My ears are now so bad, I no longer use the phone.

No  :disappointed: I'm trying to phone him for you... He's still gassing to someone  ::)

Jo
Enjoyment is more important than achievement.

Offline AVTUR

  • Full Member
  • ****
  • Posts: 249
  • West of England
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #10 on: January 23, 2022, 11:38:18 AM »
Mike
Some photos of the engine would be awesome. Do you know any details of the engine? Was it ever built from a known set of plans? Ageless engines have plans for sleeve valve engine but will not sell plans.
https://www.agelessengines.com/sleeve.htm

I have just looked at Ageless Engines website and Lee gives his reason for not selling plans - he never got the engine to work. As I think Mike said, Fedden had a skill of taking a complex engine and making it incredibly complicated. I would like to have seen what he would have done with the gas turbine.

Mike - I will be sending you a PM.

AVTUR
There is no such thing as a stupid question.

Offline Vixen

  • Full Member
  • *****
  • Posts: 3159
  • Hampshire UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #11 on: January 23, 2022, 11:42:16 AM »
I'm trying to phone him for you... He's still gassing to someone  ::)

Jo

Thanks Jo, perhaps Eric will also take the opportunity to try and sell you something

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Jo

  • Administrator
  • Full Member
  • *****
  • Posts: 15326
  • Hampshire, england.
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #12 on: January 23, 2022, 11:44:51 AM »
Eric has asked: " Is that Brian Perkin's engine"

Eric thinks he may have Brian's drawings.... filed somewhere  ::)

Edit: He thinks he sold his drawings/manual and can't find Brian's stuff.

Jo
« Last Edit: January 23, 2022, 12:14:49 PM by Jo »
Enjoyment is more important than achievement.

Offline Vixen

  • Full Member
  • *****
  • Posts: 3159
  • Hampshire UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #13 on: January 23, 2022, 12:25:24 PM »
Eric has asked: " Is that Brian Perkin's engine"

Jo

No, Brian Perkins built the 9 cylinder Aquilla, single row, sleeve valve engine. The Hercules is a twin row 14 cylinder sleeve valve.

Thanks for asking him

Mike
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

Offline Vixen

  • Full Member
  • *****
  • Posts: 3159
  • Hampshire UK
Re: Bristol Hercules sleeve valve radial engine plans drawings
« Reply #14 on: January 23, 2022, 12:42:27 PM »

 As I think Mike said, Fedden had a skill of taking a complex engine and making it incredibly complicated. I would like to have seen what he would have done with the gas turbine.

AVTUR


However, by adding all that complexity, Feddon usually managed to double the power output, during the lifetime of every engine.

As to gas turbines; Frank Whittle is said to have told Feddon that his gas turbine was basically very simple... just one moving part. Feddon is said to have replied, If I had that engine, we would quickly design the 'simple' out of it and then produce some real power.  But that's probably only hearsay.

Mike
« Last Edit: January 23, 2022, 04:02:14 PM by Vixen »
It is the journey that matters, not the destination

Sometimes, it can be a long and winding road

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal