One of the concerns with a venturi system is that it produces less suction at low speed and hence it takes longer to spin up a gyro to its operational speed, that is, a venturi is at its worst on takeoff when the need for attitude guidance can be at its most critical. I think it is important to have a vacuum gauge linked to a venturi so you can be sure you have sufficient (usually about 5") to run your system reliably.
John Martindale 29 Jane Circuit Toormina NSW 2452 AUSTRALIA ph: 61 2 6658 4767 (H) mob: 0403 432179 email: johnja...@optusnet.com.au web:www.members.optusnet.com.au/johnjanet/Martindale.htm -----Original Message----- From: krnet-bounces+johnjanet=optusnet.com...@mylist.net [mailto:krnet-bounces+johnjanet=optusnet.com...@mylist.net] On Behalf Of John Gotschall Sent: Tuesday, 24 February 2009 2:30 PM To: KRnet Subject: Re: KR> Venturi on a KR2S You can try the method I used, look at the last few pics on the main page (internet exploder users may have to go right rather than down to see the pics) and look for a link to "vaccuum system" at http://www.mykr2.com belt driven vaccuum pump vw2100 all home brew. turns the pump at 2500 rpm when the crank turns 3800. jg turbo 2180 kr2, N611GB Puyallup, WA On Mon, 2009-02-23 at 18:40 -0500, Gary Shubert wrote: > > I've been struggling to find a way to drive my vacuum pump on my KR2S... > _______________________________________ Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.3/1968 - Release Date: 02/23/09 18:22:00
