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Jabiru

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algate(at)attglobal.net
Guest

Posted: Fri Apr 28, 2006 6:37 am Post subject: Jabiru

Michael,



I was talking with a gentleman that had a Model 4 for sale complete with

Jabiru 80Hp engine. He told me that he cruises at 2,900 rpm 5 galls/hr (imp)

at 85mph.



Do you have similar figures with your Kitfox as I was a little surprise by

this as I achieve around the same with a 583. (Albeit not with the same low

rpm, noise level and TBO)



Regards



Gary Algate

Lite2/582

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Michel

Joined: 10 Jan 2006
Posts: 966
Location: Norway

Posted: Fri Apr 28, 2006 9:48 am Post subject: Jabiru

On Apr 28, 2006, at 4:39 PM, Algate wrote:

 	  Quote: 	
		   Do you have similar figures with your Kitfox as I was a little 

 surprise by

 this as I achieve around the same with a 583.


	


Well, it's difficult to say,Gary, because I am not good at numbers. I 

know that e.g. my ASI is somewhat 5 MPH over the real speed, when I 

compare with the GPS. But then, compensating for the wind, etc. I am 

not accurate, it's more a feeling.



Anyway, at 2,900 RPM, I would reach, if not  exceed my Vne on my model 

3, which is 100 MPH. I usually cruise at 2,600 to 2,700 RPM, which 

gives me something like 85 MPH. Since I also had a 582 before, I can 

definitively say that the Jabiru engine gives more power than the 

Rotax. But I think the question may be in the choice of a propeller.



I have a Jabiru two-bladed fixed-pitch wooden prop of 60 by 38 inches. 

My static RPM at WOT is 2,900 and, at level flight: 3,000. I have never 

reached anything near the rated 3,300. But I have been told that my 

figures are good for a cruising propeller. I think you should ask your 

gentleman friend what is his static RPM. I am pretty much sure that it 

is higher than mine. If I understand this correctly, from reading the 

Jabiru list, he has then a good climbing prop. Which is nice on short 

fields. But I have 2,500 ft of asphalt to take off from. So, I am much 

better with my slightly higher pitched prop with a nice and economical 

lower cruising RPM. Actually, if I just fly around, sight-seeing with a 

passenger, I hardly go over 2,400. Why burn much fuel?

 From my trip to Belgium, last summer, I calculated my  consumption to 

be about 14 liters per hour. Since then, I have adjusted the carb 

needle one step down (as instructed at 50 hours) and I should burn even 

less. But then, again, numbers and statistics are not really my cup of 

tea. All I know is that I am very pleased with the Jabiru, it served me 

well during the 115 hours I have had it, summer as winter. Never a 

problem to start it, even in sub-zero temperature. And yes, it is 

incredibly smooth running, compared to the 582.



Cheers,

Michel

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_________________
Kitfox 3 - Jabiru 2200

algate(at)attglobal.net
Guest

Posted: Fri Apr 28, 2006 11:14 am Post subject: Jabiru

Thanks Michel



Gary Algate



--

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