Sidney; With respect to (wrst) HP VS SPEED the ratio is one of cubes. eg the cube root of 75 hp is 4.2. that of 100 hp is 4.62. The ratio is 1.1. ie if 75 hp gives 150 mph 100 hp gives 165 mph. W.G.(Bill) KIRKLAND wkirkl...@rogers.com ----- Original Message ----- From: "Wood, Sidney M." <smw...@titan.com> To: "KRnet" <kr...@mylist.net> Sent: Thursday, February 26, 2004 1:28 PM Subject: KR>KR-2 Engine Choices
KRnetters, I am building a KR-2, converted to tri-gear from retract conventional gear. Dan Diehl gear legs are installed. It is time for an engine. My first choice was a 75 hp 2180 vw direct drive with electronic ignition from Steve Bennett. Full-up price ready to bolt on, including freight and wood prop is about $7,000. Then I came across www.vw-engines.com that were offering three sizes of vw with fuel injection. What looked about right for my KR-2 was a 2000 cc 100+ hp model RG 2000 with a geared redrive, fuel injection and electronic ignition. This engine is based on a type 4 Porsche engine. The weight with all accessories less a wood prop is 221 lbs. To effectively use this 100+ hp I will need a 58 inch diameter by 60 inch pitch prop. That means I need to raise the standing height another 3 inches for proper ground clearance. That means I need to replace the Diehl gear with longer gear from www.vw-engines.com . Also I must use a new bed-mount for the new nose gear and redrive engine, rebuild the fuel system to accommodate low pressure and high pressure fuel pumps, an anti-surge tank, tank selector to route return fuel to the wing tank being used, and possibly another fuel gauge for the anti-surge tank. The cowl will require several bumps for the fuel rails. The price quote from Australia is $13,980 US plus freight and customs to add about $700. Another $2,000 is estimated to do the airframe mods. My first question: Is an extra 25 hp worth an extra $9,000? Second: Is an estimated extra 91 pounds empty weight on a KR-2 realistic? About 90 percent of this will be forward of the main spar and ahead of the firewall. Third: How will the taller gear effect ground handling and flight characteristics? I would appreciate your help on this engine choice matter. Regards, Sid Wood, KR-2 N6242 Mechanicsville, MD sidney.w...@titan.com _______________________________________ to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net please see other KRnet info at http://www.krnet.org/info.html
