Return-Path: Received: from hpamgaab.compuserve.com ([149.174.217.153]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Tue, 15 Jun 1999 00:38:35 -0400 Received: (from mailgate@localhost) by hpamgaab.compuserve.com (8.8.8/8.8.8/HP-1.5) id AAA12241 for Lancair.list@olsusa.com; Tue, 15 Jun 1999 00:41:30 -0400 (EDT) Date: Tue, 15 Jun 1999 00:41:04 -0400 From: Lynda Frantz Subject: Performance 320 vs 360 Sender: Lynda Frantz To: Marve Kay Message-ID: <199906150041_MC2-796B-7159@compuserve.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline X-Mailing-List: lancair.list@olsusa.com <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> >I am building an LNC2 and would like more first-hand data on > performance of the 320 vs. 360 (160hp vs. 180 hp). It is soon > time for me to get serious about an engine choice. Cruise speed varies by the cube root of the horse power ratio. V2=V1(hp2/hp1)**1/3 Cruise speed difference between a 180 and 160 hp is about 7 knots. Rate of climb increases by the hp difference x 33,000/GW If the aircraft GW is 1,800 and with a 20 HP increase the ROC increases by 366 fpm. Having flown side by side with my 320 friend, the above numbers are good in the real world too. The performance difference isn't that much, but my friend is bothered when I pass him even if it is only at 7 knots. Get the 360 unless you happen to find a deal on a 320. When I bought my IO-360B1F in 1994 it weighed 27 pounds more than the comparable IO-320. Jim Frantz Lancar Network News >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html