barryk

Hey Alan Please email me the name of that fuel injection carby [email protected] thanks barry

Hi Alan I can only reiterate what the factory recommends, run it hard, our experience has been reduced engine life when run at low cruise settings for extended periods. Fuel is cheap compared to $800 per pot last time I replaced barrels. Also you will probably find on cross country trips your fuel consumption is not any higher as the extra speed results in less engine hours. On a recent trip where a J160 and J230 did a trip of 38 hours plus, the fuel consumption is very simular between the aircraft with the J230 departing after the J160 and arriving before it on each leg of approximately 3 hours. Regards Barry

I've been asked to re-post my experience with Jabiru engine temps and runing at low RPM here (originally posted on krnet.org). In my experience the Jabiru will not last long if run at 2700 rpm as the barrels will glaze and then oil consumption will go through the roof. I have 2 Jabiru 2200 4 cylinder engines, one in my KR2 and one in a Jabiru J160. The KR2 I have only ever flown hard, 2950 rpm plus, the CHT's are around 310 Fahrenheit, and have had no problems with the engine. On the other hand the J160 was flown more conservative, 2750 to 2800 rpm because it constantly had CHT's around 360 Fahrenheit. The J160 has had the heads done up 3 times, 2 new sets of barrels in 500 hours. I modified the cowling and the RAMAIR ducts and bought the temperature down to 320 Fahrenheit and now run it at 2950 rpm and have no problems (and get there faster). The same applies to the 3300 engine as I regularly fly with friends who have the 6 cylinder engines have and also had problems. One of them would throttle back for hours and fly at my cruise speed and that stuffed his engine (we think). Jabiru specify: - Max. CHT (Climb) 200°C (392°F) - Max Continuous CHT (Cruise) 180°C (356°F) In reality we have found max of 180°C (356°F) and cruise 160°C (320°F) gives us best results. I have my Grand Rapids EMS alarm come on at 175°C and rarely have that come on. Another trick to play with is to try flying with the ball off centre and see what that does to your temps. On climb in the J160 I fly with the ball off centre to the left by about 1/16 inch and that drops the temp on the hottest cylinder by 5°C........WOW. Regards Barry Kruyssen [email protected] http://athertonairport.com.au/kr2/

No, Iwas not hurnt, except for ego and pride. But I was flying (instructing) the very next weekend, so I got over it fast enough. regards Barry

YesI know him and yes he's a nice guy. He has a hanger just up from us.

I would not use a subaru, a mate of mine has and it is a lot of work to get the cooling right for the radiator and the weight is a big sacrifice. Just think of the weight in terms of a percentage. GROSS = 250kg of which Jabiru 2200 is 60kg, motor is 24%, now increase motor to subaru of about 115kg including water, GROSS is now 305kg and motor is 38%. Not only have you reduced your payload but you power to weight ratio is shot out the door along with fuel consumption. But on the other hand ther is cost, thats where the corvair comes in.............I suppose. How much will you really gain with the big horsepower (and big fuel consumtion)? This was the decision process that lead me to my Jabiru 2200 in the KR2. Weight wise I could have hade the 3300 but what would I really gain, a few not more knots speed, a slightly better climb rate and about 5 litres an hour more fuel burn. This is just more information to confuse the decision, sorry :;)2:

Bravery has nothing to with it. It is a only a matter of research, research and more research and then making some test pieces and testing them (till they break) and when you are happy do the job for real. After crashing my KR2 it took me 4 months to fix the spar, 3.75 months of research and testing. One week to do the job working after hours. My test piece made from aircraft grade spruce (well it is a spar) failed beside my joint, I used a 3 tonne jack break it and it took more effort than jacking up my 4 wheel drive. My KR2 will fly again and soon, I can hardly wait. :-)

I have a KR2 with a Jabiru 2200 and an IS28M2 motor glider. I have 400hrs plus of flying, 75% is gliding. I have a level 1 gliding instuctors rating. I have re-enigined my KR2 :;)2:, crashed it and I am now in the process of rebuilding it :confused:, 2 or 3 months to go:). I have a WEB page http://www.users.bigpond.com/kr2/ regards Barry

Hi Jim and welcome (I'm new to this forum as well). If you do a corvair check out http://www.flycorvair.com/ and http://home.hiwaay.net/~langford/corvair/ regards Barry