Return-Path: Received: from judicator.med.utah.edu ([155.100.60.39]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Thu, 4 Nov 1999 17:02:35 -0500 Received: from greigh.kingsw (KWSCHD [63.224.125.132]) by judicator.med.utah.edu with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id W2LKA0YH; Thu, 4 Nov 1999 15:25:28 -0700 Message-ID: <003f01bf2711$7346a480$1601000a@greigh.kingsw> Reply-To: "Greig Huggins" From: "Greig Huggins" To: Subject: Re: Propellers Date: Thu, 4 Nov 1999 15:10:48 -0700 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> >What is a PSRU? I have purchased a subaru and will be using a hydrolic >constannt speed prop. I hope. >Bobby >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> PSRU stands for prop speed reduction unit. Because props (for the most part) are designed to spin much slower than auto engines turn you have to bolt a psru to your subaru to reduce the engine rpm at the prop. We are also putting a Subaru 6cyl in our White Lightning. This engine will turn about 5,000-6,000 rpm and with a 2.2:1 psru, the prop will turn between 2,200 rpm and 2,700 rpm. To date, we have not found anyone who has then mounted a hydraulic constant speed prop to this configuration. The Marcotte PSRU has the capability to supply oil to the prop, but can't find anyone who has done this with a constant speed prop governor; therefore the electric constant speed is being considered. Greig Huggins >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>