That's a good idea Don, but I am afraid to cut anything from the poor drums because it looks razerthin on the drum walls... I can't believe RR has made and sold such crapy parts to the experimental aircraft market....
Stay safe & fly high! Dr. Hsu On Wed, Feb 10, 2021, 12:32 PM donald january <januaryd...@gmail.com> wrote: > You could chuck your drums up in a lathe and do a light cut and true them > up and hold better on run up. Worked for me > > On Wed, Feb 10, 2021 at 12:01 PM Dr. Feng Hsu via KRnet < > krnet@list.krnet.org> wrote: > >> Thank so much Parley for the excellent information on converting the Rand >> Robinson drum breaks into Hydraulic breaks. Since you have done your >> conversion nearly 30 years ago, so I don't think Aircraft Spruce still >> offer anything like that for my KR2 which can fit into the same landing >> gear structure for the same retractable configuration...?! >> >> Anyways, I just saw very encouraging reply from Mr. Colin (from UK >> perhaps) >> about converting into disk break with the same RR cable drum breaks... so >> I >> may want to try just that. I guess my easiest and most cost effective >> solution or experimenting on the break would be to first change the >> existing problematic drums with high quality part as you suggested? I hope >> I could still order a pair of high quality drums from somewhere (which >> just >> fit my wheels) like you suggested? I am hesitating to go for the major >> modifications (on both landing gear and break systems) is trying not to >> put >> extra weight on the bird, simply because I still like the design specs on >> speed and fuel consumptions according to KR's original design objectives, >> and hopefully it was not a exaggeration in the first place ... Frankly, >> the >> exciting KR design spec was the real bat that got me into this "deep >> woods".... I understand KR's design was trying to achieve cruise speed at >> around 185 mph with maximum of 200mph, and fuel consumptions only at >> around >> 3.5 to 4 gph and I was told the VW engine (2100D) can burn automobile >> gasoline without serious safety issues....?! >> >> Kindest regards, >> >> Dr. Hsu >> ABQ NM - Houston TX area >> USA >> 713 513 0423 >> >> On Tue, Feb 9, 2021, 5:46 PM Parley Byington <byington1...@cox.net> >> wrote: >> >> > Dr. Feng >> > >> > I just read your post on the net concerning brakes and on the kr2 >> retract >> > system and seen my name listed as someone to contact concerning info >> about >> > it. >> > >> > Yes I converted the original drum setup bought from Rand Robinson to >> full >> > hydraulic differential rakes while maintaining the ability to retract >> the >> > gear. >> > >> > I bought Matco disc brakes that easily fit on the existing wheels and >> they >> > didn’t cause any interference problems with the retraction of the gear. >> > >> > I bought these. Brakes from Aircraft Spruce out of California. I used >> > “grease gun flexible hoses, bought from NAMPA auto for the brake lines >> from >> > the pedals to the rotating spring bar. I have had NO problems with the >> set >> > up since installed back in 1992. >> > >> > The grease gun hoses are rated at plenty of pressure to hold brake >> > pressure and were very reasonably priced (under $20.00 for two). They >> also >> > are available in se wrap different lengths. >> > >> > Let me know if more information is needed. >> > >> > Signed >> > Parley Byington >> > KR-2 N54PB 1835VW turbocharged >> > Vietnam era veteran >> > Henderson Nevada USA >> > >> > Sent from my iPhone >> > >> > >> _______________________________________________ >> 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
