----- Original Message -----

From: Ed Anderson

To: Rotary motors in aircraft

Sent: Monday, September 13, 2010 3:40 PM

Subject: [FlyRotary] Re: New rotary Cozy IV builder

Hi Eric,

 

Welcome to the list,

 

Probably some of the carnard builders on the list can tell you what they did.

 

However, I would NOT use oil - boiling water/steam would be bad enough in case of a leak, but hot oil would be much worst - in my opinion.  Not to mention how messy it might be to clean up an oil leak.

 

Given the amount of weight, not too mention risk of having a hot fluid moved that far - what you might want to consider  an alternative such as a heavy duty battery/electrical system and put at light weight ceramic heater up front - just a thought.  That would then also isolate YOUR heat from the engine heat.  I use coolant myself, but in the winter my engine will seldom get above 150F and can be lower (no thermostat) - which means my heater bearly keeps the toes from freezing.  A ceramic heater is under consideration {:>)

 

Ed

 

Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com

From: Eric Deslauriers

Sent: Monday, September 13, 2010 11:19 AM

To: Rotary motors in aircraft

Subject: [FlyRotary] New rotary Cozy IV builder

Hi all,

 

First post ever, as I indicated, I’m at the start of this long road, building a Cozy IV. Being in Montreal, I’m planning on having a radiator in the nose for heat.

 

My question is: what would be the better option, plumbing engine coolant to the nose or engine oil? What in your opinion would result in a lighter/safer install?

 

Thanks,

 

Eric Deslauriers, CMA

Directeur principal / Senior Manager

Juricomptabilité et évaluation d'entreprises / Forensic accounting and business valuation

Demers Beaulne S.E.N.C.R.L.

1100, boul René-Lévesque Ouest, 20ième étage

Montréal (Québec) H3B 4N4

Téléphone :   (514) 878-0290

Mobile :         (514) 887-2136

Télécopieur : (514) 874-0319

mailto:edeslauriers@demersbeaulne.com

http://www.demersbeaulne.com

 

 

---

De : Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] De la part de Al Gietzen
Envoyé : 13 septembre 2010 10:19
À : Rotary motors in aircraft
Objet : [FlyRotary] Re: Radiator cap - system pressure

 

Chris;

 

More pressure doesn’t translate to more cooling, but it does increase the temp at which it will boil, and reduce the probability of cavitation in the pump.  And recognizing that pressure caps are differential pressure valves (the absolute pressure on the coolant decreases with altitude), it’s good to use a cap with a relatively high pressure, maybe about 25 psi. I’d also suggest that the plumbing should be such that the pressure cap is on the inlet side of the water pump.

 

Probably the first thing affected by higher pressure would be coolant system hoses. If you use good quality hoses, and change them every few years or 100 hours, pressures up to 30 psi should not be an issue.

 

Al

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris and Terria
Sent: Monday, September 13, 2010 2:56 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Radiator cap - system pressure

 

Gents,

 

What pressure caps are you running with?  What maximum should be used?  I currently have a 16 lb cap, but have found ones up to 29 – 31 lbs.  I know more pressure means more cooling, but is there a maximum limit before hurting the engine?

 

Chris

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