Model Pratt & Whitney Radial Engine

Discussion in 'General Engine Discussion' started by Heritech, Dec 1, 2019.

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  1. Dec 1, 2019 #1

    Heritech

    Heritech

    Heritech

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    Hi All, Over the years I have collected castings for a 1/6 scale P & W radial aero engine. I have also spent quite some time manufacturing numerous parts.

    Currently I am trying to contact a potential supplier of cylinders for this model.

    Cylinders are part no: 40, drawing no: J18 on the plans I have. The specification is for cylinders from 4140 steel from tube o/d 34.5 mm x 39.2 mm long. The engine requires 9 cylinders bored to 22.2 mm.

    I would appreciate a contact to my email.

    Regards, John (heritech@optus.com.au)
     
  2. Dec 4, 2019 #2

    Peter Twissell

    Peter Twissell

    Peter Twissell

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    Hi John,
    Are you looking for pre-machined parts, or simply 4140 stock in adequate sizes?
    Would you consider using 4130? It has slightly inferior strength and wear resistance properties.
     
  3. Dec 5, 2019 #3

    ninefinger

    ninefinger

    ninefinger

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    I've been struggling with making these cylinders off and on (mostly off) for what appears to be 8 years!
    I have actually made real good progress only recently, as the major stumbling block has been the cutting of the fins. I believe I've finally figured that part out but I'm in no place to offer up making them for somebody else.

    I have some info though. It was in an email to me from Bruce Satra at Vernal Engineering, who supplied me the castings. He gave me the following info (back in 2006 !):

    Items from Chris Lauridsen, finished valves, finished cylinders, cylinders are alloy steel, heat treated, honed bores, blued, his prices are very reasonable.
    His address:

    Central Utah Tool
    775 South University Avenue
    Provo, Utah 84601

    His parts are produced on CNC machines

    Looking up on the web found that they still exist at the same address so maybe give him a try:

    https://www.centralutahtool.com/index.html

    Phone (801)374-2745
    Fax (801)374-2850

    Company e-mail : company@centralutahtool.com

    Regards,
    Mike
     

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