Steph, It is a great question. I my opinion your location is fine. Neutral or slight positive is a good thing for takeoffs and landing. Any negative angle would be bad. For weighing the aircraft - the plane should be level.
With a slight nose up, you will have less pressure on the stick to elevate the nose during takeoff. If it was below level you could have to exert extra pressure to get out of the negative angle and could cause a "wheel barrow" effect. More force on the main gear is fine, but not the nose gear. A positive angle is also better for soft field take offs. Keeping the nose up is critical on soft field takeoffs. A positive angle also helps on landing as a positive pitch reduces the potential to "slam down" the nose after landing - and put undo force on the nose gear. You should always try to keep the nose up on landing anyway, but a positive angle will help. Only potential negative is the added drag induced by the slight nose up during the take off role. I don't think 10 mm is going to cause you any significant issues. Neutral would be best for minimal drag. Thanks, Rob Schmitt N1852Z -----Original Message----- From: KRnet <krnet-boun...@list.krnet.org> On Behalf Of Jeff Scott via KRnet Sent: Friday, September 07, 2018 10:54 AM To: krnet@list.krnet.org Cc: Jeff Scott <jscott.pla...@gmx.com> Subject: Re: KR> Progress and question Steph, I don't know whether the fuselage will need to be level or not. For take off, I don't think it would be a problem unless the nose is going to stay on the ground and cause a shimmy. However, my bigger concern would be whether you will be able to land on the mains and not be bumping the nose gear at the same time. Maybe one of the nosedragger pilots on here can contribute their opinion. Seems to me Rob Scmitt's KR would be a good example of a Stock KR-2S nosedragger configuration, so perhaps he can offer a better opinion than me based on his experience. Rob, would it matter on landing if your nose gear was an inch taller? Would that create too much abuse to the nose on landing? What about on takeoff? Would that keep the nose on the ground too long and potentially create a shimmy issue? I suspect not, but perhaps Rob can give us his opinion? -Jeff Scott Cherokee Village, AR Sent: Friday, September 07, 2018 at 8:51 AM From: "Stef den Boer via KRnet" <krnet@list.krnet.org> To: KRnet <krnet@list.krnet.org> Cc: "Stef den Boer" <stefk...@ziggo.nl> Subject: KR> Progress and question Hi kr family, Today we did one of the last jobs where we coult have a delay with. We filled up the brake system. It was a easy job with no leaks. Great feeling. Instruments are installed, I have noise from the radio / transponder. Al wiring is almost finished. Need to final check the flight contralls and install safetywire it. And install the engine but that is plug and play.... The day of the first flight is close...yesssss Question.1 I extended the nose gear 2 inch (50mm) but need only 40mm. So the longaron will be a bit out of water level, and I have a bit more prop clearance, but also more force to the gear. Should I shorten is waterlevel longerons or schould I leave it like this? Question 2 Needs the longarons water level in the mtow situation or in empty weight situation. thanks, stef Steph and his dad are building the KR-2S see http://www.masttotaalconcept.nl/kr2 http://www.masttotaalconcept.nl/kr2 _______________________________________________ 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
