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Was Nothing new then now propeller twist

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thilo.kind(at)gmx.net
Guest

Posted: Thu Sep 06, 2007 9:29 am Post subject: Was Nothing new then now propeller twist

Hi there,



I'm flying a Zodiac 601 HDS with Rotax 912 with the water rad unerneath the cowling (original Rotax rad). Depending on the OAT the water temps start to climb to 220 F over a period of 10 minutes or so. During climb out I typically see 210 F. In cruise, the water temps drop to 140 F. CHT temperature on the other hand does stay pretty stable at around 100 F (it's a bit higher, since the sensor is not properly calibrated).



Also, a few weeks ago I had an incident with the Rotax: one of the cooling hoses from the rad to the pump burst open and I lost all coolant fluid in flight. Luckily, I was right over the airpoirt and down at the ground within 4 minutes. During that time, the CHT temps didn't go up despite lack of cooling fluid. Also, the water pump was not damaged due to lack of fluid. Pretty good engine....



Thilo

-------- Original-Nachricht --------

 	  Quote: 	
		   Datum: Thu, 6 Sep 2007 10:07:10 +0100

 Von: "R.C.Harrison" <ptag.dev(at)tiscali.co.uk>

 An: rotaxengines-list(at)matronics.com

 Betreff: RE: Re: Was Nothing new then now propeller twist


	


[quote] 

 <ptag.dev(at)tiscali.co.uk>

 

 Hi!Roger

 No. Not that I could tell. Maximum 5 minutes and the coolant is too hot

 to make a dash for it! I'm resigned to accept that at present, since

 when flying it's fine. I get words of advice that after 10 to 50 hours

 it runs cooler anyway.

 I tried the half choke setting in flight yesterday and it made no

 difference to coolant temps. I thought running richer would have had a

 dramatic effect since the guys with a mixture facility can control their

 burn really well.

 Regards

 Bob Harrison. G-PTAG 

 

 

 

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hgmckay

Joined: 23 May 2006
Posts: 397

Posted: Thu Sep 06, 2007 11:07 am Post subject: Was Nothing new then now propeller twist

Thilo:



What caused the radiator hose to burst? Was is a defective hose, loose

clamp, or what?



Hugh McKay



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