Search results

Homebuilt Aircraft & Kit Plane Forum

Help Support Homebuilt Aircraft & Kit Plane Forum:

  1. rv6ejguy

    UN hails end of poisonous leaded gas use in cars worldwide

    Couldn't agree more. I scrolled through most of it, just going to the parts with charts. Basically unwatchable.
  2. rv6ejguy

    UN hails end of poisonous leaded gas use in cars worldwide

    A new AOPA podcast has the GAMI head discussing their new UL avgas. Unfortunately pretty deadly to watch due to the poor production and synching of clips and audio:
  3. rv6ejguy

    UN hails end of poisonous leaded gas use in cars worldwide

    Has been available for over 4 years now in many locations in the US. Good on them.
  4. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    TEL is primarily responsible for the octane rating in leaded avgas. You're not losing octane rating by climbing and B29s switched to low altitude night bombing to carry higher bomb loads, higher bombing accuracy, reduced time spent at climb power which was wearing out engines quickly and to...
  5. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    No moving or wearing parts in the computers though, MTBF is hundreds of thousands of hours from our stats.
  6. rv6ejguy

    Raptor NG Discussion

    I did a weight analysis of a 400hp class hybrid/ electric fan setup including a 50KWh battery pack and it weighs roughly 1000 pounds more than a TSIO-540 with propeller. This will also come nowhere close in speed to the Lycoming setup. Static thrust is less and the fan efficiency is really low...
  7. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    I think it's safe to say that most homebuilts will be cruising below 29K for a variety of reasons. If you're not doing over 300 knots, ATC probably doesn't want you up there anyway, adding to their workload, mixing with jet traffic.
  8. rv6ejguy

    Another engine theory Q - Blowers?

    Most folks use what they have experience with and are comfortable with. I've worked with a bunch years past and found many overly complicated for running an aircraft engine which spends most of its time at relatively constant power settings and low rpm. Seen SW and noise issues on some high end...
  9. rv6ejguy

    Another engine theory Q - Blowers?

    A piece of paper doesn't mean much. I've seen scary work done by certified auto mechanics as well as AMEs, (A&Ps to our American friends). You either care and know how to do the job properly or you don't. The cert doesn't mean you do great work.
  10. rv6ejguy

    Raptor NG Discussion

    I missed the stators being added later. If you look at the UL-39 project, the stators are not even close to a symmetrical profile nor are most turbofan stators. Obviously there is a lot going on here that needs lots of testing to validate the best design of the fan and stators. Fascinating topic.
  11. rv6ejguy

    Raptor NG Discussion

    Interesting that the drawings show stators behind the blades but none are seen in the photos. Really looks like a ducted propeller.
  12. rv6ejguy

    Another engine theory Q - Blowers?

    I would say not very likely due to the costs and time involved to satisfy the FAA requirements for such things. The low production rate would put the price out of sight on a per unit basis. I believe the Aerosance and Lycoming FADECs were $10-$20,000, years ago, depending on model. Aerosance...
  13. rv6ejguy

    Another engine theory Q - Blowers?

    I didn't say I wasn't going back to carbs (though I'm not), I said the vast majority of our 2000+ aviation customers are not. We don't sell too many full EFI setups for VWs due to the EFI price vs. the engine price. Are selling more and more EIs to VW guys though who are sick of mags and other...
  14. rv6ejguy

    Another engine theory Q - Blowers?

    I dunno, we have the largest order backlog in our 27 year history right now on aviation EFI kits. We do no advertising outside of a small ad on VAF so that I can post about SDS there. The rest is word of mouth, our website and YT page which costs almost nothing. The vast majority of systems are...
  15. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    Nope again. I guess you're not aware that a B-29 holds the USA manned piston absolute altitude record at 47, 910 feet, set in 1946... Properly designed EFI DOESN'T add any significant heat with the fuel block exposed to ambient air as shown below. It will be COOLED by -65F air here. Bruce...
  16. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    About 5% of Bendix equipped Lycs have the rotary Lear type pumps and some folks have used them with EFI, same with the Conti pumps. Here though, we are talking auto engines and EFI which pretty much exclusively use electric pumps and certainly won't be using certified type mechanical pumps or...
  17. rv6ejguy

    Veloce 600, 6 seat pressurized twin auto-converted engines.

    The big difference between Raptor and this project are the men behind them. PM had zero background in Aero, engines, structures, systems etc. Mark is an actual engineer who has a huge engine background, aero background, having designed other aircraft before and has worked in the industry for...
Top