Dr. F Hsu, Steff, It actually sounds like Stef is doing fine on solving this issue of nose heavy controls. Moving a battery is certainly not an easy solution.
I have a ground adjustable but otherwise "fixed" trim tab on my elevator. I set it up during Phase I testing to provide for hands off flight with just myself abord. When I have a passenger, I use a bunge cord (same as his spring concept) to push the nose further down to relieve the control pressure needed for the heavier load. It works fairly well. Best option would be for a fully in-flight adjustable system, I see a lot of Ray Allen servo systems out there. But they do cost some money. Fixed trim tab and springs is much cheaper. Thanks, Rob Schmitt N1852Z www.robert7721.com Kansas City, MO -----Original Message----- From: KRnet <krnet-boun...@list.krnet.org> On Behalf Of Dr. Feng Hsu via KRnet Sent: Monday, March 30, 2020 9:36 AM To: KRnet <krnet@list.krnet.org> Cc: Dr. Feng Hsu <fenghs...@gmail.com> Subject: Re: KR> Yes I fly again. Hi Stef, I am new in this KR world and I take every opportunity to read and learn from this family! However, I am just a bit curious about your solution for the "nose down" issue? Why would you want to install a fixed trimtab, instead of trying to resolve the problem through checking your "weight & balance" status, and possibly make some easy changes, such as moving your battery a few inches forward or backward...? Kindly and stay safe & healthy! Dr. F. Hsu Albuquerque, NM USA On Mon, Mar 30, 2020, 6:49 AM Stef den Boer via KRnet <krnet@list.krnet.org> wrote: > Hi, > > Last few days the weather in the Netherlands was good so I took our > baby in the air after a few months. I have to go alone because of the > corona virus my dad needs to stay at home. I did 2 session about 1:10 uur each. > > It was good to have the feelings again. I did Some training, 360`s, > steep turns, accelerating to 150 kts and back to 70kts and again to > higer speeds. I am feelings every hour more and more relax in the KR2. > > > Oil cooling > > I did a modification to the oil cooling and the temp is now 108 degr c. > (In cruise 130 Outside 4degr c) So I did won a few degre but for the > summer I need to goo down a few more degree. I have one more idea to > do. If this is not werking I need to go for the 2end oil cooler. > > > Landings, > > The landings (4 times) feelings more relax, but due to my longer nose > section I make everytime the same mistake to drop the nose when the > Main gear touch down. I think I want to have a good view to the > runway. I need more practice I think. > > > Nose down from first flight. > > The plane wants to go nose down from the first flight so we installed > a fixed trimtab on the elevator. Problem solved. I think we made the > elevator a bit to heavy, so the weight of the ellevator is forcing the > nose down.....I think. I designed a bracket (at my push pull bar for > the > elevator) that can picknick up a few Springs. The idea was that 2 > spring will be oke to do the job. But after a test flight (I removed > the fixed > trimtab) the plane is going again a bit nose down at 80 kts. I need > only a bit stick force to keep the plane straight, from 80 kts and > higher the original trimtab is efficient enough. Next flight I will > install an extra spring, I think the problem is than solved. > > > I need to make an extra muffler because the plane is a bit to noisy. > This will be the next to take care off. > > Let you know if I have new experiance. > > > 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 _______________________________________________ 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
