Hi, The weight and ballence is perfect, we made the fuel tanks in the leadingedge and this works perfect. But the elevator is a bit heavy, so the springs pulls the elevator up. To fly the first Test hours I installed A fixed trimtab. But now after 15 hours on the airframe I found the solution in the springs. At this moment the elevator (with 2 springs) is (on the ground) almost aligned with the stabilo. But still a bit down. A ballenced elevator is also aligned with the stabilo. So one more spring will do the job...I think.
I hope this info is enough. If you have more ideas, let me know. Stef > Op 30 maart 2020 om 16:35 schreef "Dr. Feng Hsu" <fenghs...@gmail.com>: > > 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 mailto: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 mailto:krnet-le...@list.krnet.org > > > > > 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
