Microlighters • View topic - Rotax 583 powered KR2
by Jean Crous » Mon Jun 12, 2017 6:53 pm Guys...Henni may just be surprising all of us with something else ......watch this space Jean.
Posts: 1123Joined: Sun Sep 19, 2010 6:31 pmLocation: Barrydale Western Cape
by HennivR » Mon Jun 12, 2017 7:26 pm Hi Jean & Rudi,Jean, man it's hard not to let the cat out of the bag. But this time round I'll try my utmost best. Let everything materialize first. Then I'll discuss it over here. It'll be EXACTLY what I wanted. That new Cubby of yours sure is one sexy looking aircraft. Congrats with the new upgrade. Now your Cubbies will compare with the best out there.Rudi, I've been bragging about your average racing speed of 185mph on the KR2 forum. The guys find that hard to believe. So I posted a pic of your turbocharger. I see quite a few downloaded it. Yes, hopefully we'll fly together again in the near future. I am so much looking forward to it. I will most definitely ask for the recipe of that monster Type IV VW of yours. That white KR2 of yours must be one of the most sexy KR2s I've yet seen pics of. And it surely must be one of the fastest flying on a VW! The only faster one I know of did 192mph, but it had much shorter wings & thus a higher stall & landing speed.Recently I've found pictures of my 1st KR2 project that I completed in the mid 1980s. Also of the KR1 that I partially rebuilt a few years later. Will take photos of those pics & post here soon. Shame, I also found some of the much older pics of Sakkie Hallgreen & ZS-UKU. I feel so sorry for him. Building his KR2 & house at the same time with so much dreams for the future. He was so super conservative and yet someone else' stupidity cost him his life - putting lead in your spinner to compensate for a too far aft CG. The KR2 does not like spins - to enter into a spin in a too far aft cg configuration in a KR2 is going to cost you your life, that's for sure! All Sakkie did was test fly someone else's finished project. To this day I wonder if he knew about the lead in the prop spinner which cost him & the builder their lives.My work keeps me rather busy at the moment. But it's nice to be able to dream once again after being wiped out totally financially.Keep well all,Henni
I feel so sorry for the late Sakkie Hallgreen...
Posts: 23Joined: Sat May 27, 2017 8:47 am
by HennivR » Fri Jun 16, 2017 8:33 pm Hi All,My apologies - let the cat out of the bag prematurely. Might as well start to build from scratch.Henni
Last edited by HennivR on Sat Jun 17, 2017 2:32 pm, edited 3 times in total.
by JvTonder » Fri Jun 16, 2017 9:08 pm Hi Hennie so neem aan jy het by Jean "As is" gekry, kompleet of nie en met wat se motor? Geluk nou is jy nader aan vlieg!
Posts: 1312Joined: Mon Sep 14, 2009 10:47 amLocation: Rhinopark
by HennivR » Fri Jun 16, 2017 9:18 pm Hi All,My apologies - let the cat out of the bag prematurely. Might as well start to build from scratch.Henni
by Rudix » Sat Jun 17, 2017 6:47 pm Jammer om te hoor dinge het nie uit gewerk nie Henni?Wat van 'n KR2 wat so +-70% klaar is en reeds geregistreer is?Groete,Rudi
Posts: 1653Joined: Sun May 07, 2006 8:04 pmLocation: Pretoria - Rhino Park
by HennivR » Sat Jun 17, 2017 8:25 pm Rudix wrote:Wat van 'n KR2 wat so +-70% klaar is en reeds geregistreer is?Hi Rudi,As jy nie omgee nie, kontak my asb op buildtofly@yahoo.com - sal dit baie graag met jou wil bespreek.Vriendelike groete,Henni
by HennivR » Tue Jun 20, 2017 8:47 pm Thank you Rudix for agreeing to sell your project to me.The following pics show this project as is and the only modifications I plan to add to it (described in photo captions)Henni
She will soon be at her new home.
From tail to nosedragger
Split flaps on inboard wings
New rudder shape
Belly air brake
Canopy open method
Jabiru 6 cylinder if I can afford at the time
by Goose » Wed Jun 21, 2017 8:15 pm Hi Hennie Hoekom so baie modifications, hou die vliegtuig so basic as moontlik. Mods sit gewig by en gewig maak performance dood. Groete Hans
Posts: 1117Joined: Tue Nov 04, 2008 10:18 pmLocation: Pretoria, FAWB
by Jean Crous » Wed Jun 21, 2017 8:21 pm Goose wrote:Hi Hennie Hoekom so baie modifications, hou die vliegtuig so basic as moontlik. Mods sit gewig by en gewig maak performance dood. Groete HansEk stem met daai Hans. Hennie luister na Hans se raad,.....hy weet waarvan hy praat.Jean.
by HennivR » Wed Jun 21, 2017 8:36 pm Hi Hans,1. KR2 het beperkte dwars wind hantering vanwee die sterwiel. Dis hoekom so baie nuwe bouers vir die neuswiel opsie gaan. Ek het baie KR2 videos. In een staan die loods amper regop in die sitplek met die canopy oop om te sien waar hy taxi. Verskil in neuswiel en stertwiel gewig nie baie groot nie. Skuif hoof wiele slegs na agterkant van main spar - gebruik selfs dieselfde gate. Links voor gaan na regs agter en anders om. Neuswiel is castering, so nie baie werk nodig nie.2. KR2 kom baie, baie vlak in vir landings. Plus die sig oor die neus is baie swak op finals. Die split flaps is maklik om te maak, weeg min en help vir altwee hierdie simptome. Weeg feitlik niks.3. Vir die cowl inlets - sien huidige cowl foto waar die vorige bouer reeds hiermee begin het. Ek hoef dit net af te rond. Geen gewig impak hoegenaamd.4. 'n Sy cowl outlet is baie meer effektief. Die lae druk bokant die vlerk suig letterlik die lugvloei uit die cowl uit. Geen gewig impak hoegenaamd.5. Die 6 silinder Jabiru weeg minder as die turbo Volla, maar lewer 120 perde. (Dit hang van my finansies af - huidiglik net 'n droom) Ek dink 'n 2e handse enjin vanaf 'n Bantam sal nie veel meer kos as opgeboude 'n turbo Volla nie.6. Agter venster gemaak van dun mylar - weeg baie min maar gee baie beter gevoel van ruimte plus baie beter sig na agter.7. Wingfold - hierdie is rerig 'n baie eenvoudige konsep met verbysterende resultate. Dun aluminium pyp en nylon bushes wat rerig nie baie weeg nie.8. Ek oorweeg nog die canopy oopmaak metode.9. Wingwalk - die standard KR2 verg 'n geoefende kuns om in en uit te klim deur direk boop die main spar te trap. Goed vir die eienaar bouer - nie noodwendig vir alle passasiers nie.10. Belly airbrake - nie rerig nodig met split flaps nie (ek skat albei werk ewe goed) My 1ste KR2 het 'n belly airbrake gehad, sonder die gate. Die effek daarvan op die grond op 80mph is werklik stunning. Lees my verhaal erens op hierdie thread. Ek gaan eersdaags fotos van daardie projek hier pos - moet eers fotos van fotos neem en werk tans lang ure.11. Ronde rudder - lyk heel anders - verg amper geen modifikasie. Sien hoe ek dit voorheen gedoen het. Wat jy agter aan die rudder sien is slegs dun ply wat met 'n lagie veselglas aan die huidige rudder geplak is.11 Ek gaan die standaard canvas slingseat gebruik soos per die planne - hierdie weeg letterliks niks nie. Die sitplek ingeboude "kussings" le slegs bo-op dit. Sy sywaartse seksies word op dun, dun ply gevoeg wat net oor die stringers aan die kant van die romp le. Lyk uiters luuks, weeg so te se niks nie.Wel, daar het jy dit. Ons almal droom, myne is van 'n spesiale KR2. As dit nie uiters lig kan wees nie, dan uiters vining. Al die idees hierbo genoem vlieg reeds op KR2s regoor die wereld. Ek voeg net die bestes saam, did al.Vriendelike groete,Henni
Cowl inlets as is
My 1ste KR2 projek
See how easy this will be.
Op 'n KR2
by HennivR » Wed Jun 21, 2017 9:53 pm From a KR2 newsletter:If you were going to improve the performance of your aircraft,what single i tem would give the best results for the least amountof work? I mean a real improvement as much as a 20% decrease inparasite drag , I'll give you a hint, one of the greatest sourcesof parasite drag is the cooling system of an air-cooled engine ,You EAA guys know by now what I'm talking about • • • a cowl flap. Thisis the easiest, most effective, single thing you can do to increase the performance of your aircraft.
by HennivR » Wed Jun 21, 2017 10:29 pm Hi all,This KR1 & KR2 each have a confirmed level flight top speed of 230mph. The KR2 has normal length wings & uses a 120hp Continental engine.Cheers,Hennie