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Thread: P85, New Kit Design, First V8 Engine Runs

  1. #1

    P85, New Kit Design, First V8 Engine Runs

    We recently accomplished the first runs of the V8 engine in our P85.

    Video here: http://altitudegroupllc.com/aircraft/p85/
    Attached Images Attached Images   

  2. #2
    Chad Jensen's Avatar
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    That is going to make one beautiful looking, and great performing airplane!! Nice work!
    Chad Jensen
    EAA #755575

  3. #3
    Aaron Novak's Avatar
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    It would be very interesting to know the details of the engine, what components were used and what kind of validation work was done? The LS architecture is not the worst to start with, and as long as components are adjusted for durability and reliability, and a good QC program is put in place it should be a neat engine. Not the cheapest.....but fun

  4. #4
    Quote Originally Posted by Aaron Novak View Post
    It would be very interesting to know the details of the engine, what components were used and what kind of validation work was done? The LS architecture is not the worst to start with, and as long as components are adjusted for durability and reliability, and a good QC program is put in place it should be a neat engine. Not the cheapest.....but fun

    The engine in our first P85 is essentially an LS3 stroked to 402 cid. GM sells a marine version of the LS3, rated at 418 hp and 80% "max continuous" power. Marine duty cycle is very, very similar to an aircraft duty cycle, especially if you are using a fixed pitch prop. Todays production automotive engines are validated via extremely rigorous and thorough testing protocols, with gigantic development budgets.

    An LS3 crate engine runs about $6300. We figure the P85 firewall forward cost at approx $20K. This includes everything: engine, prop, re-drive, ECU, exhaust cooling, etc. All new parts. Excellent HP/$ ratio.

    Jeff
    Last edited by Jeff Ackland; 09-04-2014 at 07:30 PM.

  5. #5
    First Flight of the P85 Dec 17th! Airframe and engine performed with no problems right out of the box.

    Some air to air video:

    http://youtu.be/cHJGQGiqXfU

    Jeff

  6. #6

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    Congrats Jeff! Looks great!

    Jim
    Measure it with a micrometer, mark it with a grease pencil & cut it with an axe.

  7. #7

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    congratulation , Amazing its engine and body looking nice Good working .

  8. #8

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    Very nice, but why no in flight video? It sure would be nice to take a virtual ride in that and hear that engine in action. Nothing sounds better then a Big V8. Please post some in flight video and let us hear that v8 in action.

    Tony

  9. #9

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    Quote Originally Posted by 1600vw View Post
    Very nice, but why no in flight video?.

    Tony
    See reply #5 Dec. 2014.

  10. #10

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    Quote Originally Posted by Floatsflyer View Post
    See reply #5 Dec. 2014.
    I missed it. Should have known. Thanks for pointing me in the right direction.

    Tony

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