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Posted
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. 012_thumb_up.gif.cb3bc51429685855e5e23c55d661406e.gif

 

 

  • 5 weeks later...
Posted

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

 

 

Posted

Findan

 

I would sugest if you are burning a hole in the piston that it might be running lean. Do you have EGT guage?

 

 

Posted

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

 

 

Posted

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

 

 

  • Helpful 1
Posted

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

 

 

Posted

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

 

 

  • 1 month later...
Posted

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.

 

20160827_143703.jpg.7db9c79f8216bbe4dd761b693b2a193e.jpg

 

I also removed the standard throttle handle and installed a vernier version from Mcfarlane.

 

20160828_144325.jpg.3c0d10f154ffff7a607f29e1895dfa87.jpg

 

So for now nothing is really happening.

 

20160904_100408.jpg.63eb3e715e2879f3eacfea0bf1a2a6e0.jpg

 

20160827_143657.jpg.0385faee946e085e08839952e7d24fcc.jpg

 

20160828_144349.jpg.b1650096384345e2dd9c696e8e2b7e70.jpg

 

20160904_100437.jpg.a6af08856bdabac36fc9e0463890c915.jpg

 

20160904_100422.jpg.edf7c5f81f84131c5bea63af854a22c1.jpg

 

 

  • Like 2
  • 1 month later...
Posted

Finaly got my permit for flight testing, now to find a good opportunity to fly this winter..

 

 

  • Like 1
  • Winner 1
Posted
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!

 

 

Posted
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...................................................................................

 

 

Posted
its just raining...................................................................................

Windscreen wipers???

 

 

Posted
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.

 

 

  • Haha 1
Posted
Nice sunday taxiing around.[ATTACH=full]46626[/ATTACH]

Nice pic.........we're all ready...............)

 

 

Posted
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.

 

 

  • 3 weeks later...
Posted

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 :)

 

 

Posted
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.

 

 

Posted

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

 

 

Posted

I removed flaps at 500 feet , about 1:35 into the film.

 

Was it to late?

 

 

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