flyrotary@lancaironline.net Mailing List Archive

Dennis, given that you had the manifold pressurized above ambient pressure by using the leaf blower, I would assume that the more throttle you gave and opened up the throttle plate more - you permitted more air flow (now assisted by the leaf blower) into the manifold. Where you airflow had been limited by the ambient air pressure - with the blower you are now operating as if the ambient were a higher pressure. No dead throttle travel could indicate that give the additional flow and resulting higher manifold pressure, that you might could have used a slightly larger TB in this circumstance to permit more air flow and get even higher manifold pressure/density. In other words your current TB size could have become restricting with this higher (blower assisted) air flow, whereas with only unaided atmospheric pressure pushing a lesser air flow through the throttle body it was not restricting. While I WAS joking about putting a leaf blower under the cowl, I do think the results were very interesting. So if Ernest air pump can get up to 1.2" Hg, it looks like he will have a functional and useful system. Whether it provides benefit worth the effort yet remains to be seen. But if Ernest didn't come up with these things, he would be flying before I pass on and he's determined not to do that {:>) Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dennis Haverlah Sent: Tuesday, February 16, 2010 11:28 AM To: Rotary motors in aircraft Subject: [FlyRotary] Idle Oil Pressure and Extra Throttle travel While performing the blower tests yesterday I checked my idle oil pressure and it was 55 to 65 psi. at 1600 rpm. I have the original oil jets in the engine. I did not notice any appreciable dead area in the throttle travel as I approached the WOT condition. Dennis H. -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com