eightyknots Posted July 8, 2016 Posted July 8, 2016 Ok so i mounted the new air scoops and cooling is superb!It looks ugly but im not joning and pagent anytime soon. This makes me wonder if i installed the second radiator in vain now when it seems it was the scoops? [ATTACH]44152[/ATTACH] [ATTACH]44153[/ATTACH] [ATTACH]44154[/ATTACH] [ATTACH]44155[/ATTACH] [ATTACH]44156[/ATTACH] They look like big scooping air intakes. As Bob said, flow-thru air is the key (avoiding the flow-around paths). I hope you have that well sorted. One day, when you fly your aircraft to Australia, you'll still have plenty of cooling capacity to keep your engine at the correct operating temperature.
findan2002 Posted August 7, 2016 Posted August 7, 2016 Hello Skee! Being a newcomer to Recr. Fl. I have not yet had the possibility to explore every corner of it, nor to be acquainted to all the tips and tricks. But this is indeed interesting reading to me, as I made an emergency landing on a rough grassfield in Southern Poland this Wednesday with my factory build Savannah. Burned a hole in a piston of the right hand rear cylinder (for the 2. time in 4 years by the way). Every expert knowing much more about engine cooling than I do have always stressed the primary importance of getting the air OUT of the engine bay, this matters much more than the size of the air intakes. In the best case you could perhaps at a later stage reduce the size of those big air intakes if you manage to optimize the size and/or position and/or angle of the oblique downward-rearward pointing cowlflap at the lower-rear end of the cowl. We can't take it for granted that the default ICP-positioning of that cowlflap is quite optimal, I think my story indicates that. OK, it was a Jabiru, but still! Optimizing the air-suction by Venturi-effect was the lesson I should have learned before burning a piston for the 2. time! So, I am also looking for a liquid-cooled engine, and the D-motor seems perfect. Wonder how many UL-pilots in Europe have any experience with it?? Kind regards and good luck
planesmaker Posted August 7, 2016 Posted August 7, 2016 Findan I would sugest if you are burning a hole in the piston that it might be running lean. Do you have EGT guage?
findan2002 Posted August 7, 2016 Posted August 7, 2016 Hi! My technician at the airclub consulted some English Jabiru specialists telling him to change the jetneedles of the Bing carburettor for a fatter cooler mixture. This was after the 1. pistonburn 4 years ago. It probably helped to some degree, but not sufficiently. The Jabiru engine is excellent for a Jabiru aircraft, I am sure
planesmaker Posted August 7, 2016 Posted August 7, 2016 I actually have a rotax installed in my jabiru, it is an excellent combination. So you don't have EGT ? If operating a jabiru engine I consider a multi CHT & EGT a necessary instrument for engine monitoring Tom 1
findan2002 Posted August 8, 2016 Posted August 8, 2016 Hi Tom! I have to admit: No EGT! No matter what, any engine should be sufficiently cooled, even climbing with max load on a summerday. Do any of the Jabiru aircraft (still) experience cooling problems with a Jabiru engine, that you know of? If so, is that why you fly with a Rotax? findan
planesmaker Posted August 8, 2016 Posted August 8, 2016 Yes cooling a jab is still a problem for most. I installed a rotax when I built mine just to be different, I am very happy with the aircraft. Tom
Skee Posted September 9, 2016 Author Posted September 9, 2016 So nothing much is happening now, inspection is approved and papperwork is taking way to long time, my technical advisor has gone missing so i cant get the final signature from him... The leading edge wing was black but i got so big movements when sun shined so i wrapped it in vinyl. I also removed the standard throttle handle and installed a vernier version from Mcfarlane. So for now nothing is really happening. 2
Skee Posted October 18, 2016 Author Posted October 18, 2016 Finaly got my permit for flight testing, now to find a good opportunity to fly this winter.. 1 1
Kyle Communications Posted October 18, 2016 Posted October 18, 2016 Go for it before the weather turns nasty
eightyknots Posted October 19, 2016 Posted October 19, 2016 Finaly got my permit for flight testing, now to find a good opportunity to fly this winter.. I suppose days are getting shorter now and nights longer in Sweden. You'll have to go for a flight on Saturday!
Skee Posted October 22, 2016 Author Posted October 22, 2016 I suppose days are getting shorter now and nights longer in Sweden. You'll have to go for a flight on Saturday! its just raining...................................................................................
rankamateur Posted October 22, 2016 Posted October 22, 2016 its just raining................................................................................... Windscreen wipers???
eightyknots Posted October 26, 2016 Posted October 26, 2016 Windscreen wipers??? Hi RA, I hope you're not fitting windscreen wipers to your Savannah! You'd be breaking a long-held, strong tradition that only British planes have them. 1
IBob Posted October 31, 2016 Posted October 31, 2016 Nice sunday taxiing around.[ATTACH=full]46626[/ATTACH] Nice pic.........we're all ready...............)
Kyle Communications Posted October 31, 2016 Posted October 31, 2016 Why are you taxiing?..looked like a reasonable day...you should have done a circuit or 3
Skee Posted October 31, 2016 Author Posted October 31, 2016 Why are you taxiing?..looked like a reasonable day...you should have done a circuit or 3 Sun goes up and down really quickly here ;) this was my pre check ,, first engine start in 2 months before flight next time.
Skee Posted November 16, 2016 Author Posted November 16, 2016 Woohoo snow came and went,, sunday maybee??
IBob Posted November 23, 2016 Posted November 23, 2016 We envy the sound of your engine! So, how'd she go, Skee???
Kyle Communications Posted November 23, 2016 Posted November 23, 2016 Someone forgot the flaps :) Dont worry we have all done it...just be carefull though check the flaperon brackets for bending the skin. Flies much better after you put the flaps away on takeoff :)
rankamateur Posted November 24, 2016 Posted November 24, 2016 Someone forgot the flaps :)Dont worry we have all done it...just be carefull though check the flaperon brackets for bending the skin. Flies much better after you put the flaps away on takeoff :) Early in my training with Bill, I hung full flap out at near cruise speed. Just pulled it on like a handbrake. We did inspect it after but there appeared to be no ill effects.
Kyle Communications Posted November 24, 2016 Posted November 24, 2016 Laurie Strickland did it to his and it pulls the top skin in a bit where the flaperon hangar brackets are attached to the wing. I think its only if you fly for prolonged periods like that. I took off during training and forgot to put the flaps away..flew like a dog and wouldnt stop climbing until I realised what was going on. No bending to Bills plane but laurie certain did have on his
Skee Posted November 24, 2016 Author Posted November 24, 2016 I removed flaps at 500 feet , about 1:35 into the film. Was it to late?
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