Alvis Leonides radial

  1. Keith 66 Member

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    1,600
    Essex UK
    Back in 94 i somehow managed to get a contract up at Pinewood studios working on the sequel to Gone with the Wind a sky mini tv series Scarlett. I hired them a whitehall rowing/sailing boat for a storm scene. I started out as technical adviser & then ended up being stunt double, the wind for the storm scene was provided by two Cheetah radials mounted on what looked like a swiveling field gun mounting, each had a big guard round the prop & had a control panel & hand throttle mounted out to the side for the operator. A Five gallon drum of Avgas stood to one side & went down alarmingly fast when they were revved up. I was in the boat ten yards downwind of them.
    It was bloody great & i will remember the noise of them roaring at full throttle until the day i die.
     
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  2. Wallace

    Wallace Member

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    I should have taken a photo under the protective caps, 7 contacts in each.
     
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  3. Tinbasherdan

    Tinbasherdan Bodger in chief

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    That sounds about right, the bth mags on the single row Leonides only has one set of contacts per mag. I should have known really but it didn’t dawn on me
     
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  4. Tinbasherdan

    Tinbasherdan Bodger in chief

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    There’s a company in Saudi I believe my boss has done work for that has two ex Shackleton griffons they use as wind machines to test the weather tightness of building fronts. Basically spool the griffin up and empty a fire hose into the prop wash and find out what leaks!!!
     
  5. Tinbasherdan

    Tinbasherdan Bodger in chief

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    Might be worth 500e asking his friends if they need a spare mag, it should fit their whirlwind
     
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  6. Wallace

    Wallace Member

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    Thanks Dan, is the Whirlwind airworthy or a ground runner?
     
  7. Tinbasherdan

    Tinbasherdan Bodger in chief

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    As in the today I have acquired thread, we now have a prop. It’s a De Havilland Hydromatic 3 blader, 9 foot dia. It came off a Pembroke I believe. Next job is to shorten the blades to make it 7’6”
     
    • 979DF830-C073-49A7-B683-4383B7EFAF56.jpeg
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  8. Bullet2012

    Bullet2012 Forum Supporter

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    So, having no idea about those sort of props, how do you shorten them, just chop each down and re-balance?
     
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  9. Tinbasherdan

    Tinbasherdan Bodger in chief

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    yep, cut each blade down equally and then balance the old girl
     
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  10. Bullet2012

    Bullet2012 Forum Supporter

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    Thank you, always good to learn
     
  11. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    What are you doing with the ends. I’ve 10’ of rotor blade I want to use/turn into something.
     
  12. Tinbasherdan

    Tinbasherdan Bodger in chief

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    hadnt even thought about it to be honest, quick answer is not a lot!
     
  13. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    Mitre it at a jaunty angle, and glue it to the wall:laughing:
     
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  14. Carl Wilson Member

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    I've just found this thread and it's fascinating. Strange you got that engine from Hull. About 30 years ago, when I was an aircraft Technician, there was a scrapyard in Hull on Hedon Road called Specialised Spares. At the back of the yard there was a Percival Sea Prince fuselage with the wings behind it. Next to it, lying on the ground, were it's Leonides engines.

    There was also a Vickers Varsity in there too, and a Whirlwind.
     
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  15. Tinbasherdan

    Tinbasherdan Bodger in chief

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    I wonder if that’s the sea prince that ended up at Carlisle?
     
  16. Carl Wilson Member

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    I've no idea. I didn't even know there was a Sea Prince in Carlisle. They are lovely aircraft.

    Last time I saw one was in Norfolk, there is one at the museum near Flixton.
     
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  17. Tinbasherdan

    Tinbasherdan Bodger in chief

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    There used to be, our boss had a share in it, it got scrapped eventually though :(
     
  18. Shox Dr

    Shox Dr Chief Engineer to Carlos Fandango

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    Cant find the original video. Took this the other day, reported miss-fire. As you can see No2 isn't firing at all, and No6 not running well either, the heat trace you see in no6 cylinder is oil behind the piston heating up the bore. Turned out to be bent push rods from over rev’ing.

    This engine has longer headers, so you cant see the exhausting of each pot so easily
     
    Last edited: Aug 15, 2019
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  19. Tinbasherdan

    Tinbasherdan Bodger in chief

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    Prop is now cut down to 7’6” and mounted for a static display at Lytham wartime weekend this weekend

    B53FA4C1-9E83-4C29-BC2C-AFE30F5F8A00.jpeg
     
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  20. Carl Wilson Member

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    You've probably already answered this but how do you go about balancing the prop after cutting it?

    How much avgas does the engine get through at a show?

    I'd love to see it. Years ago when I found the Sea Prince in the Hull scrapyard I harboured ideas of buying the Leonides engines and restoring them. Sadly at the time I had no money and no premises!

    I was an a/c tech in the RAF then and I now wish I'd got Cosford Museum involved.
     
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