I bought the MC-4 regular length, and rather than send them back for about 1/2" too long, I had to rotate the clevis all the way down to fit the existing brake holes. This made the threaded rod stick up into the clevis where it interfered, so I ground off about 4 of the threads on my grindstone (wrapped in wet cloth to prevent heating all those nice delicate brake seals!) and it fit nicely on my stock MK IV pedals. Here is a photo (yes, I had to tighten the set nut after I took the picture!)
I have over 2 hours on the 670 now, and all looks great. I owe a long tome with performance info, but so far runs great, strong, smooth. No leaks or funny stuff, and Rotax Rick's build looks like a good quality job. Mike Hair's exhaust seems great, it fit well, and runs quietly. In cruise, the 670 seems to be able to be throttled back to low fuel flow, so the RAVE valves seem to work, because when at part throttle, the fuel flow seems to be able to get down to descent levels. I can throttle back to less than 5 GPH, and get about 85 mph. Frankly, I have spent most of my time getting the prop set, and the jets. I am flying from Parowan, UT at 6000 feet and about 30 deg C so the air is pretty thin and the mixture had to be jetted way back. I am running 165 jets, and also leaning a little in cruise with the Hacman. The engine starts and runs great, and here is some really rough performance points at 1000 lbs GW and 7000 feet, 28 deg C, 9800 ft DA. I have a fuel flow gauge to help see what the fuel burn is: 5900 rpm, 5.1 GPH, 76 mph IAS, 88 MPH TAS, 1080 EGT. Then 6200 rpm, 7.1 GPH, 82 mph IAS, 95 mph TAS, 1080 EGT. I will be back home next week, and intend to take a few long performance flights to see steady fuel flow, egt, rpm and flight performance and will publish it all. So far the only negative is that my water temps are up, probably because I had to open the cowl bottom and that disturbed the air flow thru the nostril radiators. I added a belly radiator to help, so the radiator is slowing me a little. I have to block the nostrils and also drop the belly rad in the days to come, so more to report . For the rest of the build, the Highwing LLC gear is a dream (see photo), the landings are solid and track straight ahead, no tendency to wander in yaw. The tail wheel hits slightly first in a genuine three pointer, and the aircraft just has no lift left when I bother to hold the stick way back. It feels really solid and not at all as squirrly as it used to. My new brakes are terrific, I installed the MC-4 skinny cylinders (see photo) that allowed me to drill the new pivot much closer to the pedal so I more than doubled my brake force. I can hold the 670 against the brakes now on the ground to about 6000 rpm!
Thanks Paul. That is the list I looked at a while back. Don't know why I couldn't find it now. I did call the two guys near Duluth, neither of them does experimental aircraft. I know some DARs work with Cirrus aircraft in Duluth. I'll have to talk to the guy in Sauk Rapids, Mn. JImChuk
Well this thread has been dormant for a long time, about time I updated it. Finally started to put some clothes on this baby. At this point, maybe we would just say underpants..... Hopefully I can do the sides and top tomorrow afternoon/evening. The wings have been done for almost 2 years, so the plan is to get the rest of this ready to spray and paint it out. Then as long as I have the spray booth set up, I'll spray out the Kitfox 3 I picked up a week ago. It's a plan anyway, we'll see how much life gets in the way of that. Weather starts to cool around here in late September, so that's a bit of a deadline for my painting. JImChuk
this is from the EAA https://www.eaa.org/en/eaa/aviation-communities-and-interests/pilot-resources/amateur-built-aircraft-and-light-sport-aircraft-inspection/find-an-faa-e-ab-designated-airworthiness-representative
Thanks Bandit, I know there was one in Duluth as well, but he has moved away. I even talked to the FAA in Minneapolis a week ago, and the gal told me to look on the FAA web site, but I didn't find it there. I know I've seen it before, just cant find it now. JImChuk
Paul, Does yours shimmy at all? Mine does on pavement. I would guess that is what is causing your issue. Even if you couldn’t feel the shimmy, it might still be doing it on a small scale. Shimmy is the same as flutter, and flutter is what a flag does in the wind. Think about what an old flag looks like. I’d guess the best way to stop it is too tighten up the vertical axis nut. Seems someone mentioned something about re torquing it after a couple months use. Makes sense, Good luck. Bryce
well I am on my third tire for the wide 8" dual fork tail wheel. Same problem with both, a split in the side wall cheap Chinese Carlisle tires with no other options available about $36.50 USD from Matco. The good news is that they are available thru Walmart.com for about $13.50 delivered to your local store in a couple of days with no freight charges. Anyone else having problems with the outside wall splitting on these tires? I ordered two and put one on the shelf for next year.
"Merde alors".... glad you're ok and little damage to your bird. Regarding your prop, you can order just the one broken blade...(would be nice to have a close photo of the propeller blade to see how it delaminated).
Yep been there too. Part of this game we play. No fun when it is "our turn at bat" and we strike out.... but the good part is that everyone else on your team understands and is there to pat you on the back.
Yes it used to be Casey's... The build quality is good (built by Rick Mosher) but It had not flown in years when I bought it and there were A LOT (50) of items to correct to make this Catalina flyable again. I am very happy with it now
Thanks- I’ve watched several videos of the replacement I’ve not found one yet on how to fashion the loops. There is powerfully little data out there on material selection either. Some have mentioned using bungee chord from a home supply store, others buy theirs from AS, one guy mentioned getting it from eBay....sketchy I should think. Wish me luck- my plan is to knock this out tomorrow