Thank you all Brad, Larry and John for the encouraging words and the excellent tips on getting my KR2 off the ground for the maiden flight. It is good to hear that someone outside the US have actually managed to get a KR2 certified to fly without much modifications (i.e. kept tailwheel & cable break as the original design)?!
I have actually thought about never touching the cable breaks for the first landing, but not sure if our 5200ft runway here at KAEG was long enough to allow the KR2 run out of momentum?! It looks like this risk is now completely acceptable assuming your 600meter estimate is accurate. In this case, I have a safety factor of about 2.5 at the least with respect to runway limit on landing! I have been trying to do some high speed taxing on the KR2, and especially trying to stop the bird completely for an engine runup test, but I failed it every time because the bird just kept moving with only less than 2500rpm throttle regardless how desperately I step my toes on the break paddles.... Frankly, I felt like I could break the cables easily or rape apart the paddle supporting structure on the floor (100% wood!) if I just put whatever force with my toes needed in trying to stop the bird...!! Converting it to tricycle landing gear and hydraulic breaks would be major modifications, and I don't think it's a project can be completed with less than another full year of time and thousands of dollars to spend, right?! I am trying to get a true risk picture for taking this bird to the sky without modifications, and I am afraid to say that such a safety risk is quite serious perhaps, which probably explains why there is almost no one here in the US who is still flying a KR2 with the original design unchanged (taildragger with cable breaks)....?! I will be very keen to hear if anyone here in the US who is still flying a KR2 with the same configuration as mine? Kindly, Dr. Hsu 713 513 0423 On Fri, Jan 29, 2021, 11:09 AM Great Western Airsports < f...@greatwesternairsports.com> wrote: > Dr Hsu, hi. > > There's much advice on here but Mr Flesner in an email today gave good > advice. Don't overcontrol, use your fingers to control rather than 'a whole > arm,', be smooth but postive. > > Your concerns about retracts are possibly well founded but, you've alway > got the option if a go-around, it's an option and privilege available to > you until you find your feet. > > My 2-penneth from someone who recently putting through certification > albeit here in the UK(std KR-2, Retracts, cable brakes) > > 1. Find the longest runway available to you for your first flights. Don't > use brakes other than as taxi aids and power checks, keep stick fully aft, > these aircrafts will tip onto the prop if you're undisciplined whilst > taxying over a pencil(maybe an exaggeration). Over the hedge at > 60mph(ground speed) in my aircraft results in approx 600 metres roll > without brakes. > > 2. During takeoff roll, increase power smoothly and control direction with > rudder, just as you were taught. If you let it get out of hand, side loads > build up which I understand has led to failures. > > 3. Heavy landings may cause bending moments to put the undercarriage > through the upper wing surface, not seen it but I've heard - a go around in > that first bounce is your solution until you build experience with your > aircraft. > > Kind regards, > > Brad Wagenhauser > Chief Flying Instructor > > Great Western Airsports > Brown Shutters Farm Airfield > Somerset > > Mobile - 07516 235 000 > Email - f...@greatwesternairsports.com > Website - www.greatwesternairsports.com > Facebook - https://www.facebook.com/greatwesternairsports > ________________________________ > From: KRnet <krnet-boun...@list.krnet.org> on behalf of Dr. Feng Hsu via > KRnet <krnet@list.krnet.org> > Sent: 29 January 2021 16:34:45 > To: KRnet > Cc: Dr. Feng Hsu > Subject: Re: KR> Washington KR2S Wanted > > Hey John, > > Is your KR2 a taildragger or tricycle? I certainly share your neigative > feelings about trying to flying the KR2 bird, despite that I almost > finished everything by putting in nearly a good year of my weekend time on > the project after bought it nearly a year ago... Honestly, my uneasy > feelings about this KR2 is not so much about the control surfaces or > anything related to the power plant or prop....My biggest concern is about > the fact it is built by someone based on the original KR2 design with > retract gear, taildragger, and worst of all the cable activated break > system! My fear is that it may not be able to stop the bird after landing, > needless to mention the risk of ground looping or lack of breaking power to > perform engine runups before taking off... > > Bottom line is that, the more I learn and work on this KR2 bird, the less > confidence I have to ever want to take her into the sky someday....?! I bet > your KR2 is already converted to hydraulic break and tricycle landing gear, > to say the least, correct?! I would venture to guess that your bird is > several times safer than mine to take her for the maiden flight...?! > > I have been praying that someone in this community would offer to help > getting this bird to where she belongs - not in the hangar for sure! > > Kindest regards, > > Dr. Hsu > 713 513 0423 > > On Thu, Jan 28, 2021, 12:32 PM John Gotschall via KRnet < > krnet@list.krnet.org> wrote: > > > I have a kr2, 2180 turbo, I have never flown it. It needs work. > > It is on stock gear. > > > > I have built and flown many shapes and sizes RC models over the decades, > I > > can sort of just tell by looking at the airframe, weight, and balance how > > it will likely handle in flight. > > > > So every time I get the urge to work on my KR2 I get the feeling I won't > > much like flying it. It's just too short in length, seems to me it will > be > > touchy and never will be nice and stable, easy to fly, decent airplane > for > > cross country. That depresses me and removes my motivation. > > > > Elevator response reports of which there are many reinforce the negative > > thoughts. Also dismal spin test reports (video). > > > > For a long time I owned a Cessna 172. I really liked flying it, super > nice > > to fly. Really properly proportioned. > > > > I wonder if the kr2S would generally be more like the cessna to fly as > > compared to the kr2. The longer moment with the longer fuse looks > better. > > Might be able to recover from a spin. Is more stable? > > > > I would like to buy a KR2S I think. When I go to work on it I would not > be > > discouraged by the short fuse. > > > > Any for sale near Seattle? > > > > thanks > > > > jg > > _______________________________________________ > > 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 > > > _______________________________________________ > 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 > _______________________________________________ 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
