flyrotary@lancaironline.net Mailing List Archive

It probably takes 3 or 4 HP to produce the air pressure and volume that is required for a turbo/super charger. At 12 or even 24 volts that is a lot of continuous amps! When you want extra power, something is going to have to produce it and it is not going to be free! It seems to me that the most economical for a plane is a turbo. Most of the power to run it is currently going to waste. Not all the power, just most and maybe most at that. But they can be problematic in a car and much more so in a plane. I like Mark Steitle's solution much better. Get the power you need in a more simple, less complicated manner. Bill B -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Sent: Thursday, May 26, 2011 2:23 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Blower design Except that turbocharger compressors run at over 50,000 rpm. Easy answers are hard to come by. Tracy Sent from my iPad On May 26, 2011, at 2:17 PM, Roger Robertson <rrrob3572@sbcglobal.net> wrote: > On 5/26/2011 1:02 PM, Roger Robertson wrote: > Probably the best solution is to hook a new high efficiency electric motor to a large existing turbocharger in place of the exhaust system. 10-15,000 rpm is no problem. I have a friend in the electric business that is working on just that concept for his Lancair - only problem is, he's overloaded at work. > > RRR >> Charlie England wrote > > > On 5/26/2011 8:39 AM, Ernest Christley wrote: >> Charlie England wrote: >> >>> Not to rain too much on the parade of ideas, but I'd be fearful that anything except a properly engineered blower assembly will consume more power than it will add to the engine's output. Much better minds than mine say that one of the reasons small turbines are so inefficient is excessive leakage past the perimeter of the blades, due to the ratio of the gap area to the overall area of the turbine. >>> >>> Charlie >> >> That is the biggest hurdle to overcome. To overcome the problem the shroud must fit VERY tightly. It's a much more complicated manufacturing process, but a significant percentage of the blowers you will find have the top-hat on the impeller blades. Effectively, they have a cast in shroud with 0 clearance. That was the concept I was trying to tag onto with the "thick cylinder with drilled holes" concept drawing. >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html