Results 1 to 10 of 10

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
    Join Date
    Jul 2011
    Location
    Oshkosh, WI
    Posts
    502
    That is going to make one beautiful looking, and great performing airplane!! Nice work!
    Chad Jensen
    EAA #755575

  3. #3
    Aaron Novak's Avatar
    Join Date
    Aug 2011
    Location
    Oshkosh, Wi
    Posts
    361
    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

    Join Date
    Oct 2011
    Posts
    75
    Congrats Jeff! Looks great!

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

  7. #7

    Join Date
    May 2015
    Location
    427 Kings Road,ChelseaLondon
    Posts
    5
    congratulation , Amazing its engine and body looking nice Good working .

  8. #8

    Join Date
    Nov 2012
    Posts
    1,609
    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
    Banned
    Join Date
    Nov 2011
    Posts
    1,718
    Quote Originally Posted by 1600vw View Post
    Very nice, but why no in flight video?.

    Tony
    See reply #5 Dec. 2014.

  10. #10

    Join Date
    Nov 2012
    Posts
    1,609
    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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •