I can give you an opinion from a guy who has been looking for the best of the best options and what I am seeing with N886MJ.
First, Larry is right. In my opinion this design has been pushed to its limit. At this point most everything has been tried and the best options are being used. If you build light and go as big as safely possible on the engine (which I believe is ~125hp), you can achieve a 1300MGW and 150mph cruise airplane(in a Tailwheel (TW) configuration). As soon as you try to increase the MGW with more wing area your gonna slow the airplane because of weight and drag and then your gonna need that 150hp to go 150. I have actually changed engines on my build 4 times. First a Corvair, then an O-200, then and O-235 and now I am back to a Corvair. Luckily I pretty much broke even on all those engines. I am now headed twords the 120hp Corvair with my TW build. My current 2S is a trigear and I am close to hitting that brick wall with the 100hp Corvair in it. My top IAS is 150 at 1200lbs GW. I have a few more mods to complete but I suspect I wont see much more speed. Maybe 10 more if I am really, really lucky. I settled on the KR many, many years ago because I wanted a 150mph cruise. It's looking now like I might just get there with the 120hp and the TW configuration on my build plane. Here is a video from a test I did a few days ago after I put the wheel fairings on. Best I saw was 145 IAS @ WOT and about 134 in cruise so I am a bit disappointed as I don't see this airplane getting to 150 cruise without me and the plane each loosing 100 lbs. https://youtu.be/759DgW50A7U Craig N886MJ N232WJ under construction. and the o-235 engine in it. Anything you would do different or > change? I'll be starting a build this summer an want to do a 26' wing with > the longer fuselage and wider tail and use a 150hp engine I'm developing > now. Thinking 1300 max load. I'm curious of the performance you're getting > with the 125hp engine??? Thanks _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
