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Pre-heating a Rotax?

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rparigor(at)suffolk.lib.n
Guest

Posted: Mon Jan 23, 2006 6:51 pm Post subject: Pre-heating a Rotax?

What are those flying doing to pre-heat your Rotax?



Nothing?



Forced air?



Water-heater?   http://www.ultralightnews.ca/heaters/enginepreheater.htm



Some form of Tanis?   http://www.tanisaircraft.com/



Or???

Thx.

Ron Parigoris

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paul.mcallister

Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA

Posted: Mon Jan 23, 2006 7:55 pm Post subject: Pre-heating a Rotax?

Ron,



I am using a Bob Reiff preheater.  It has a patch on the block and a band

that goes around the oil tank.  The heater on the oil tank has a thermostat

on it.  With what I know now I think I would have just bought a couple of

heater pads from JC Whitney and made up a thermostat myself.  I would have

cost me $90.00 instead of $200 some dollars.



With that said, the Bob Reiff product does the job quite nicely.



Paul

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europa(at)triton.net
Guest

Posted: Tue Jan 24, 2006 5:36 pm Post subject: Pre-heating a Rotax?

Talked to Andy about winter operations the other day.  He suggested that the

Rotax is built with tolerances similar to an automobile engine and therefore

really doesn't need preheated.  After all, do you preheat your car?



Also attended an aviation conference last week where it was suggested that

pulling an engine thru scrapes the oil from the cylinders - so you're better

off not doing that.  Also, heating the oil will drive moisture out and it

deposits on the engine internals.  Bottom line, don't do anything to the

engine.  Change the oil frequently (at least each quarter of the year).



Jim Butcher

N241BW

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raimo.toivio(at)rwm.fi
Guest

Posted: Thu Jan 26, 2006 7:54 am Post subject: Pre-heating a Rotax?

All (on the northern hemisphere)!



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raimo.toivio(at)rwm.fi
Guest

Posted: Fri Jan 27, 2006 2:21 am Post subject: Pre-heating a Rotax?

Jeremy,



OK - of course you are technically right but same target.

When rich, catalytic converter cannot work as it should be.

In fact, it is possible to spoil it by a little but possibe amount 

of rare petrol. And that is bad for your wallet and surrounding nature.

If preheated I am sure also cc gets earlier upp to operating

temperature and start to work sooner. When preheated,

the engine idle time is usually shorter and that is good for cc.

So, engine preheating also helps cc to save the world...



Wishes, Raimo (not Teimo)



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paul.mcallister

Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA

Posted: Fri Jan 27, 2006 5:29 am Post subject: Pre-heating a Rotax?

Guys,



For what its worth,  I fly my aircraft in the winter in temperatures low as

15f.  In addition to the engine heater I have a small electric blow heater

that I have connected up to domestic air-conditioning/heater thermostat

which keeps the cockpit at 50f.  The main reason is so that the gyroscopic

instruments aren't being run at very cold temperatures, but is sure is nice

to get into a warm cockpit as well.



Paul

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raimo.toivio(at)rwm.fi
Guest

Posted: Mon Jan 30, 2006 7:39 am Post subject: Pre-heating a Rotax?

Jemmy,



my only statement was:



What so ever engine preheating is always valuable

and something what wise man should do if necessary.

And it is necessary when cold enough and he has not

heated garage...



It is like preplay with woman. Some do it and some never.

My honest recommendation - get happier life.



Regards, Raimo



do not archive



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Ivor Phillips

Joined: 16 Jan 2006
Posts: 253
Location: London UK

Posted: Thu Feb 09, 2006 3:01 am Post subject: Pre-heating a Rotax?

It very similar to the kenlowe preheater i have been using on my Landrover 

for the last fifteen years, Works a treat, Certainly improves battery drain 

and starter motor wear!



http://www.kenlowe.com/pre-heaters/cars/index.html



Ivor Phillips

 	  Quote: 	
		   While talking to the local Rotax dealer, he suggested a heat exchanger 

 instead of a thermostat and a separate oil cooler. On the attached (click 

 link for list users) picture is also an engine pre-heater visible. the 

 ribbed hose is the steel protected electrical cable. He promised me 

 dimensions and weight data. The exchanger in the picture is a 

 pre-production sample, the installation is on a 912 on an Eurostar.

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raimo.toivio(at)rwm.fi
Guest

Posted: Thu Feb 09, 2006 3:39 am Post subject: Pre-heating a Rotax?

Yes, I have decided to go for separate water-oil heat exchanger

with water thermostat and electric pre-heater.

System will be tested in the test-bench before final installation.

When stored in cold hangar, it can be always on.

The cockpit /panel will be also (pre)heated and that is good for

equipments. That is also what I have used to with cars.



Cheers, Raimo

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