<VV> Electrified fan discussion

[Ron]

>From that, it seems to me that the bottom line is that so far nobody has 
been able to do better at home than the GM automotive engineers did in 
Detroit.  I suspect that that status will continue.
RonH

----- Original Message ----- 
From: "corvairs" <lonwall at corvairunderground.com>
To: "Virtualvairs" <virtualvairs at corvair.org>; "fastvair" 
<fastvair at yahoogroups.com>
Sent: Friday, August 05, 2005 3:22 PM
Subject: <VV> Electrified fan discussion


>      Bob Helt is asking reasonable questions - Reminds me of a somewhat 
> recent thread on the CorvAircraft last that I won't go into. Simply 
> stating that a product "works" is not enough  evidence, especially where a 
> radical design is concerned. And especially when a destroyed engine could 
> be the possible outcome.
>
> My observation about many Corvair "improvements" is that they are never 
> fully developed or simply aren't capable of being fully developed. By this 
> I mean, I have seen, for example,  numerous fuel injection systems that we 
> have been asked to market  yet , when pressed, the promoter will admit 
> that "there's a little detonation off the line" and "the mid range will 
> spit a little" etc etc. That is not fully developed. What a tinkerer will 
> put up with and what a customer paying real money will put up with are two 
> different things. (Note - I'm not talking about the Cartright fuel 
> injection system - Duane can quit the heavy breathing now...)
>
> The specific issue of an electric fan for the Corvair is like the  quest 
> for the Corvair Holy grail. The classic issue is that an electric fan with 
> the capacity to cool  the motor takes more amperage than is practical to 
> generate. Whether that problem has  now been addressed remains to be 
> proven. But electric fans in current autos is totally proven? Remember, 
> that  what works in a water pumper is not the same thing. The vast 
> percentage of the air cooling system in a Corvair relies on the fan 
> output.
>
> The Eddie Perez car was mentioned (He's a member of Corsa Oregon) as 
> having a successful electric fan conversion - BUT Eddie would be the first 
> to admit that there are driving situations where his system DOES NOT cool 
> adequatly. His system is not fully usable either. I have a number of 
> stories from Corvair/airplane, dunebuggy, trike folks etc where UNDER THE 
> RIGHT CIRCUMSTANCES they can run without proper shrouding or even a fan at 
> all - for a while. If you run a trike with no fan or shrouding, only use 
> it for an occassional local cruise and bike show, and the motor has "held 
> up" for 5 years (but probably only 1000 miles) have you proven anything? 
> Nope - But try to tell that to the guy with the bike.
>
> The challenege to the electric fan is to devise one that 1)Gives a net 
> advanatge in hp loss and 2) Will properly cool under ALL road conditions. 
> #2 is the really stinker.
> Doesn't mean it can't or will never happen but, at the very least, any new 
> system will have to be backed up with the kind of  testing that Bob is 
> suggesting. And requests for such documentation should NEVER be viewed as 
> an insult to the creator/promoter. There's enough of that kind of attitude 
> among some in the experimental Corvair aircraft hobby as it is.     Lon
>
> www.corvairunderground.com
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