From: To: Subject: KRnet Digest, Vol 146, Issue 2 Date: Tuesday, September 02, 2003 12:01 PM Send KRnet mailing list submissions to krnet@mylist.net To subscribe or unsubscribe via the World Wide Web, visit http://mylist.net/listinfo/krnet or, via email, send a message with subject or body 'help' to krnet-request@mylist.net You can reach the person managing the list at krnet-owner@mylist.net When replying, please edit your Subject line so it is more specific than "Re: Contents of KRnet digest..." Today's Topics: 1. KR Winglets 2. Re: Re: KR Aileron control at low speeds? (Kenny Luter) 3. Re: What carb 4. Re: VW/Zenith carb 5. Re: Re: KR>VW/Zenith carb (Brian Kraut) 6. Re: Re: KR>VW/Zenith carb (Brian Kraut) 7. Re: Busy KR weekend (Kenneth L Wiltrout) 8. RE: KR Aileron control at low speeds? (Serge F. Vidal) ---------------------------------------------------------------------- Date: Tue, 2 Sep 2003 10:01:03 EDT From: WA7YXF@aol.com To: krnet@mylist.net Subject: KR>KR Winglets Message-ID: Content-Type: text/plain; charset="US-ASCII" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 1 I always thought NASA did all the research on the winglets and that Burt Rutan was the first to put it into use. Lynn The winglets were developed by Learjet in the 1970's. The early Learjets had almost straight wings. They were looking as swept wings as a means of increasing their efficient high mach cruise numbers. ------------------------------ Date: Tue, 2 Sep 2003 10:05:58 -0400 From: "Kenny Luter" To: "KR builders and pilots" Subject: Re: KR>Re: KR Aileron control at low speeds? Message-ID: <00d901c3715b$563851c0$5d40bc3f@com> References: <20030901175625.7416.qmail@operamail.com> Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 2 He did not say the KR had slow aileron response !!!!!!!!!!! He said thr gliders response improved at slow speeds . Kenny ----- Original Message ----- From: "Ross Youngblood" To: "KR builders and pilots" Sent: Monday, September 01, 2003 1:56 PM Subject: KR>Re: KR Aileron control at low speeds? > Has anyone looked at the SIZE of a KR aileron... > I can't believe there are problems with aileron response > at low speeds... the darn aileron is nearly the length > of the entire wingspan! > > Besides at REAL low speeds, i.e. Slow flight near > the stall... if a wing drops, you are supposed to use > rudder instead of ailearon to prevent stalling a wing. > > Am I missing somthing... Of cousre I haven't FLOWN > my KR yet... so I am totally unaware of my birds actual > flight characteristics. > -- > ____________________________________________ > http://www.operamail.com > Get OperaMail Premium today - USD 29.99/year > > > Powered by Outblaze > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ Date: Tue, 2 Sep 2003 10:52:10 EDT From: AviationMech@aol.com To: krnet@mylist.net Subject: Re: KR>What carb Message-ID: <114.283b8102.2c86089a@aol.com> Content-Type: text/plain; charset="US-ASCII" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 3 In a message dated 9/1/2003 9:26:36 PM Eastern Daylight Time, klw1953@juno.com writes: > The Rev-Flow------------- What engine is the revflow attached to . I have a 2000 with a revflow. What kind of fuel system, Pressure or gravity and what is the flow if gravity. N13116 1984 to 2003 19 years in a KR. ------------------------------ Date: Tue, 2 Sep 2003 11:12:44 EDT From: AviationMech@aol.com To: krnet@mylist.net Subject: Re: KR>VW/Zenith carb Message-ID: <198.1f21de9f.2c860d6c@aol.com> Content-Type: text/plain; charset="US-ASCII" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 4 In a message dated 9/2/2003 12:18:41 AM Eastern Daylight Time, engalt@earthlink.net writes: > normal for a plane without an accelerator pump. I have used three carbs on my KR including the Zenith, and the acceleration lag is normal. However, 4 seconds seems excessive and may be the result of the flow to the carb. At full throttle shut off the fuel and look for a slight rise in rpm (25 to 50 RPM) as the engine starts to die, be sure to open the fuel prior to engine shut down.. If you don't get a slight rise there is a good chance that the mixture is lean at wot. If you get a large rise, you are too rich. N13116 1984 to 2003 19 years in a KR. ------------------------------ Date: Tue, 2 Sep 2003 08:46:57 -0400 (EDT) From: Brian Kraut To: KR builders and pilots Subject: Re: Re: KR>VW/Zenith carb Message-ID: <7470090.1062517118571.JavaMail.nobody@kermit.psp.pas.earthlink.net> Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 5 It is not a lag in acceleration. The problem is that the engine will die if I push in the throttle too fast. I can pull the mixture and I get a 25-50 RPM increase before it starts to die so I should have the mixture just about right. -------Original Message------- From: AviationMech@aol.com Sent: 09/02/03 11:12 AM To: krnet@mylist.net Subject: Re: KR>VW/Zenith carb > > In a message dated 9/2/2003 12:18:41 AM Eastern Daylight Time, engalt@earthlink.net writes: > normal for a plane without an accelerator pump. I have used three carbs on my KR including the Zenith, and the acceleration lag is normal. However, 4 seconds seems excessive and may be the result of the flow to the carb. At full throttle shut off the fuel and look for a slight rise in rpm (25 to 50 RPM) as the engine starts to die, be sure to open the fuel prior to engine shut down.. If you don't get a slight rise there is a good chance that the mixture is lean at wot. If you get a large rise, you are too rich. N13116 1984 to 2003 19 years in a KR. _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html > ------------------------------ Date: Tue, 2 Sep 2003 08:47:11 -0400 (EDT) From: Brian Kraut To: KR builders and pilots Subject: Re: Re: KR>VW/Zenith carb Message-ID: <6329249.1062517132656.JavaMail.nobody@kermit.psp.pas.earthlink.net> Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 6 It is not a lag in acceleration. The problem is that the engine will die if I push in the throttle too fast. I can pull the mixture and I get a 25-50 RPM increase before it starts to die so I should have the mixture just about right. -------Original Message------- From: AviationMech@aol.com Sent: 09/02/03 11:12 AM To: krnet@mylist.net Subject: Re: KR>VW/Zenith carb > > In a message dated 9/2/2003 12:18:41 AM Eastern Daylight Time, engalt@earthlink.net writes: > normal for a plane without an accelerator pump. I have used three carbs on my KR including the Zenith, and the acceleration lag is normal. However, 4 seconds seems excessive and may be the result of the flow to the carb. At full throttle shut off the fuel and look for a slight rise in rpm (25 to 50 RPM) as the engine starts to die, be sure to open the fuel prior to engine shut down.. If you don't get a slight rise there is a good chance that the mixture is lean at wot. If you get a large rise, you are too rich. N13116 1984 to 2003 19 years in a KR. _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html > ------------------------------ Date: Tue, 2 Sep 2003 11:54:42 -0400 From: Kenneth L Wiltrout To: krnet@mylist.net Subject: Re: KR>Busy KR weekend Message-ID: <20030902.115443.2424.0.klw1953@juno.com> Content-Type: text/plain; charset=us-ascii MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 7 I've got the more expensive Cleveland brake setup and I can't hold mine at full throttle either. These brakes are made for go karts that weigh 100lbs or so, not airplanes that gross in excess of 1000lbs. But your correct when you spoke about not pushing to hard as that load goes to the rudder via the cables.-----------------------Good luck!! On Mon, 1 Sep 2003 20:28:53 -0400 (GMT) Brian Kraut writes: > At long last my KR is at the airport. Mark, you can move the link > for my site from "KRs Under Construction" to the highly coveted > "Completed KRs" listing. I will have new pictures on my site as > soon as I get a chance to update it. I believe the KR is actually > smiling now that it is around other planes. > > Initial taxi tests have been very good. I am very happy that I > decided to put on the Matco tailwheel. It taxies around easier than > any other plane I have taxied. The Matco wheel also comes unlocked > on a turn with a little differential braking so you can spin it > right around if you want to. Visibility is pretty good. I can lean > to the left and right and see nearly straight in front of me. I can > also lean forward and see down the taxiway directly in front, > another benefit of the taller Matco wheel and the bent leaf springs. > > > I have the Great Plains hydraulic brakes. I found out that they > will not hold the plane at a full power runup and they are less > effective at stopping the plane than what I am used to. Some of > this may be due to them not being broken in yet. I have also heard > that you don't want brakes that are too effective to keep you from > nosing over. I could stop a lot faster if I really had to, but the > brakes are on the rudder pedals and I don't want to pus too hard and > break the rudder horns. > > I did figure out that a canopy that can be locked partially opened > is essential in Florida in the summer. That is going to be one of > my first at the airport mods. That bubbles is not a greenhouse, it > is a sauna. > > My plane has foam between the stringers and one thin layer of glass > from the firewall to the seat back. I have some light weight > automotive upholstery on the inside also. This makes it very quiet > inside compared to another KR I was in. I would highly recomend this > to everyone else. It probably only adds two pounds to the weight. > It should also help a lot keeping the plane warm on a cold day, not > to mention that it looks good. > > I did have a minor problem Saturday when the engine died at the end > of the runway after a medium speed taxi run. I didn't quite have > the idle mixture or speed adjusted right and the engine died when I > pulled the power to idle. Since my battery sat dead for a long time > it was on its last legs and wouldn't restart the engine when it was > hot. I killed the battery and had to pull the plane all the way > back from the end of a 2,500' runway. Luckily, the KR pulls fairly > easily. I have put in a new battery and adjusted the idle mixture > and speed and everything is fine now. > > I have more to ramble on, but will change topic tags. > > Many thanks to fellow KR Netter Art Bruce for helping me get the > plane to the airport and putting on the wings. > > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html > > ________________________________________________________________ The best thing to hit the internet in years - Juno SpeedBand! Surf the web up to FIVE TIMES FASTER! Only $14.95/ month - visit www.juno.com to sign up today! ------------------------------ Date: Tue, 2 Sep 2003 09:25:21 +0100 From: "Serge F. Vidal" To: "'KR builders and pilots'" Subject: RE: KR>KR Aileron control at low speeds? Message-ID: <000001c3717c$645ff700$2c0101c0@ate.com> In-Reply-To: <3.0.6.32.20030901194341.007c5ad0@pop.midwest.net> Content-Type: text/plain; charset="US-ASCII" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: list Message: 8 That's true for my KR2 as well: What I experience is that strong rudder input will drop the opposite wing slightly. I never tried throughout the speed range, but it is true around, say, 80 Kts. ZS-WEC is stock, as per plans. I don't understand what you mean by 3 degrees washout, but if it is in the plans, mine has got it.Aerodynamically, my KR is perfectly standard, except that the CG has been pushed forward a bit. Serge Vidal KR2 ZS-WEC Tunis, Tunisia -----Original Message----- From: krnet-bounces@mylist.net [mailto:krnet-bounces@mylist.net]On Behalf Of larry flesner Sent: Tuesday, September 02, 2003 1:44 AM To: KR builders and pilots Subject: KR>KR Aileron control at low speeds? >All, >My KR came as a built unit by Mark Edal. I have inspections dated 1994. He >stretched a KR2 to 16.5' + but kept the KR2 stab and rudder. I can't lift a >wing with rudder as it will increase the drop of the wing. Al. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This came up in a conversation I had with Willie Wilson from England. He stated that his KR will also drop a wing opposite to the rudder being used. He attributed it to the 3 degrees of wing washout. That was something I was going to test in my first few hours of flight (hopefully soon) and see if I get the same response. I'd be intrested to know if someone with a flying KR that has not built in the full 3 degrees of washout get the same response or not and how many KR flyers have noted this in their flying KR. I don't remember now if he said what speeds this happens at or if it was at all speeds. By the way, Willie also said he didn't tell the inspectors that his KR exibited this little trait as they might not be too happy with it so let's keep this among KR builders and flyers. After all, I don't think it has brought any KRs out of the air yet. Larry (still assembling and an occasional taxi test) Flesner Just 10 more sunrises till Mark and I head for Red Oak in either the Tripacer or the Oldsmobile! _______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html ------------------------------ _______________________________________________ See KRnet list details at http://www.krnet.org/instructions.html End of KRnet Digest, Vol 146, Issue 2 *************************************