flyrotary@lancaironline.net Mailing List Archive

Message

Bobby,

before you pluck down the money for the Eaton, check out the Whipple/KenneBell/Lysholm.

In the last 5.0-Mustang mag (sometimes I fall back to old habits, sorry.... :) ), there was an advertisement for a KenneBell setup as a direct replacement for the Eaton ( there was some factory offer with a Eaton charger, probably from the Motorsports department...), which claims more power/efficiency with the same setup (bolt in...)

I know that the Whipple is pricier than the Eaton, but not that much!

Thomas J.

----- Original Message -----

From: Bobby J. Hughes

To: Rotary motors in aircraft

Sent: Monday, June 13, 2005 9:20 AM

Subject: [FlyRotary] Re: normalized supercharger?

I am planning to use an Eaton M62 blower for normalization. Basically the same configuration the Egg Subi's are running without the automatic waste gate controller only one size larger. In this configuration the TB goes in front of the SS and the waste gate is built into the blower. The waste gate will be controlled by a cable and will have to fly by MP. I calculated I would need to make 3.78 # of boost to achieve sea level pressure at 8000 ft. 4.5 #'s with an intercooler. So,,, I am going to install a larger SS pulley and a smaller crank pulley to limit the boost to 4.5 psi at 6500 rpms. No need to spin the SS any faster than necessary. My goal is to have a fuel efficient plane at cruse so boost above this altitude would be wasting fuel. This also putt's the Renesis and IO540 at about the same performance level at and above 8K.... only 125#'s lighter with a faster cowl. :)

I would like to look at an electronic waste gate controller but have not figured out how to build it yet.

Bobby
RV10

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy
Sent: Sunday, June 12, 2005 7:14 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] normalized supercharger? Was Re: Is common sense dead (rant mode on)

I will have a normalized Renesis, supercharged.

Hi Mike,

How were you planning to normalize with the supercharger?

I'm planning to put either a supercharger (what I'd prefer), or another turbo (shut up John <g>) on the RV-3, somewhere down the road. One of the drawbacks to the supercharger is the lack of boost control. I asked the ATI guys about controlling the boost via a valve on the outlet of the blower, but they said not to do that because it was bad to unload the blower.

You can certainly control boost via throttle opening, and perhaps you can even do it via engine computer almost like a sort of rev limit. What's your plan?

Cheers,

Rusty (no flying today, due to work that sucks)