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  1. KC135DELTA

    Anyone want a jet?

    I talked to them about this specifically. They claimed that there is no real "limit" other than staying subsonic, however for practical application purposes they designed them for mach .338 in terms of exhaust velocity (unmixed turbofan). In other words the faster you go above .338 the thrust...
  2. KC135DELTA

    Anyone want a jet?

    I have followed PI for several years. I was quoted at $300,000 for 2 engines and all associated monitoring and FADEC hardware needed for an install. It is planned to be a certified engine.
  3. KC135DELTA

    Anyone want a jet?

    Exactly, each one of those applications requires multiple engines (except the bd-5, which isn't a practical aircraft). A single engine turbofan in the 4-500lbf range would be ideal.
  4. KC135DELTA

    Anyone want a jet?

    Although these engines are nice, they won't be viable until we get something in the 400lb-500lb thrust class available.
  5. KC135DELTA

    Twins....should spin props opposite of each other???

    You want the torque and P-factor to pull outwards away from the fuselage. If you lose an engine on take off its a big deal to say the least.
  6. KC135DELTA

    Electric motors for flaps

    I would use electric screw jack actuators. They are the strongest and most reliable ones, some capable of moving tens of thousand of pounds - something you have to consider with the loads involved and potential icing etc...
  7. KC135DELTA

    Messerschmitt 109G DRAG by Prof Hoerner !

    I think you are quoting that incorrectly, it was established that laminar flow COULD be maintained within the prop disk however on most applications it is not.
  8. KC135DELTA

    Single engine 300-400hp pusher

    I do not know where you came up with your 2,500lb number. Most modern medium/heavy duty diesels (5.9L 6.0L 6.6L 6.9L 7.0L 7.3L) weigh in the neighborhood of 1,000lbs with Iron blocks, heads, internals, and non optimized accessories. I do not think I can "out-do" those 'other guys'. However...
  9. KC135DELTA

    Single engine 300-400hp pusher

    The overall concept is to make the most aerodynamic airplane out of the lightest materials and power it via the most efficient power source. ---> Pusher configuration, carbon composites, diesel engines. If it can cruise at ~300mph on ~20gph of JET-A I believe it would sufficiently kill the VLJ...
  10. KC135DELTA

    Single engine 300-400hp pusher

    This engine (RED A03 Aero-Diesel) produces 500hp at 3,900rpm. It is more power than I want and more expensive than what I am looking for but ultimately it proves the concept. As far as the long term goes I have found that making a straight six diesel used in large trucks useable for...
  11. KC135DELTA

    Antenna placement and interference

    I use it twice a week. Get stuck up under some thick IMC, lose your GPS signal and the only thing dead will be you. :roll: Seriously, don't write it off. It's simple, everybody knows how to use it and it works. LORAN on the other hand. Is dead.
  12. KC135DELTA

    Single engine 300-400hp pusher

    I have some prospects as far as diesel goes, but until then you can modify the IO-720 to be water cooled. It uses the same cylinders as the IO-540. I'm not too concerned with getting it ~2,000 pounds either.
  13. KC135DELTA

    Single engine 300-400hp pusher

    Is everyone in consensus that this is possible? 2,000lbs empty 3,800lbs MTOW 400hp turbo-normalized to FL300 Carbon composite construction 270-280knt cruise 300knts~ max The turbo normalized mooney is capable of 240knts on 280hp and it isn't nearly as clean of a design as this.
  14. KC135DELTA

    Single engine 300-400hp pusher

    What is the aircraft in the 3rd picture of your post? It almost looks like a mini mirage f1.
  15. KC135DELTA

    "Shark" composite tandem rotax from Slovakia??

    Any idea the difference?
  16. KC135DELTA

    "Shark" composite tandem rotax from Slovakia??

    I wonder what the benefit of using a 914 as opposed to a 912 would be? More power at altitude for sure...
  17. KC135DELTA

    "Shark" composite tandem rotax from Slovakia??

    Has anyone heard of this? It looks very promising and is flying. Úvod*-*SHARK If/when will we see it in the U.S.? I could only imagine what a blast it would be with an Io-360 :roll:
  18. KC135DELTA

    Static thrust of an IO-540??

    Does anyone know of any tables or just plain ballpark #'s of static thrust produced with different props on the IO-540 (300hp)?
  19. KC135DELTA

    CAFE Triaviathon challenge with an 0-200 powered plane?

    Considering the contest does not award any points based on engine power (or lack of) I'd hazard a guess of no. I am surprised a turbine like a comp air 7 has not won this.
  20. KC135DELTA

    Has anyone heard of the Velarus VPx?

    I admit their 'power recovery' seems ridiculous. But even if they fall short it would still be leaps ahead of current turbofans in terms of efficiency correct?
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