[NSRCA-discussion] Reducing the odds...

[Chad Northeast]

Jeff,

Its been done :)

http://www.plettenberg-motoren.com/german/zuxtra.htm

Chad

jeffghughes at comcast.net wrote:

> Matt,
> Your missing my point. I have never doubted that a "properly" designed 
> duct can increase cooling. I just doubt that most modelers have  
> "properly" designed duct work in their planes. The ducts we make 
> increase cooling over not having any duct work, but I've built and 
> flown a lot of planes with engines and motors un-cowled that didn't 
> overheat either! My initial statement was around uncowled outrunner 
> motors. Why not have them up front and exposed? Save a lot of grief 
> and might just look good (or not, it just might look industrial). We 
> as pattern folks always seem to do the harder right, instead of the 
> easier right.
>  
> Jeff
>  
>  
>
>     -------------- Original message --------------
>     From: rcmaster199 at aol.com
>     Jeff, how do you increase air velocity around the motor with no
>     increase in model airspeed?
>     Here's where our old friend Bernoulli comes in, stage left.
>      
>     And BTW, the properly designed ENTRY into and EXIT from the
>     ducting really increases the ducting efficiency.
>      
>     Cheers,
>     Matt
>      
>     -----Original Message-----
>     From: jeffghughes at comcast.net
>     To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>; NSRCA
>     Mailing List <nsrca-discussion at lists.nsrca.org>
>     Sent: Tue, 28 Mar 2006 22:10:39 +0000
>     Subject: Re: [NSRCA-discussion] Reducing the odds...
>
>     While I agree good ducting can be better than hanging out there, I
>     seriously doubt if most modelers do any better than hanging it
>     out. Plus I think an outrunner all polished up woul look pretty
>     cool with the fuse faired into it.
>      
>
>         -------------- Original message --------------
>         From: "Dean Pappas" <d.pappas at kodeos.com>
>         Good ducting is better than hanging in the breeze, and a whole
>         lot prettier.
>          
>         Dean Pappas
>         Sr. Design Engineer
>         Kodeos Communications
>         111 Corporate Blvd.
>         South Plainfield, N.J. 07080
>         (908) 222-7817 phone
>         (908) 222-2392 fax
>         d.pappas at kodeos.com
>
>             -----Original Message-----
>             *From:* nsrca-discussion-bounces at lists.nsrca.org
>             [mailto:nsrca-discussion-bounces at lists.nsrca.org]*On
>             Behalf Of *jeffghughes at comcast.net
>             *Sent:* Tuesday, March 28, 2006 12:49 PM
>             *To:* NSRCA Mailing List; NSRCA Mailing List
>             *Subject:* Re: [NSRCA-discussion] Reducing the odds...
>
>             I was thinking about this the other day. Why don't we
>             change the fuse design to stick the motor out in the
>             breeze? Kind of like a WWI rotary or a foamy.  Seems like
>             we're trying hard to keep the planes identical in design
>             between electrics and fuel for no apparent reasons
>              
>             Also now that huge props and braking are available, will
>             fuselages slim down some?
>              
>
>                 -------------- Original message --------------
>                 From: "Dean Pappas" <d.pappas at kodeos.com>
>
>                 > Hi Earl,
>                 > This sounds a whole lot loke the similar duct I have
>                 placed around my AXI
>                 > outrunner.
>                 > It is astounding how much a difference a real
>                 cooling duct makes.
>                 > Fans inside the motor are a band-aid. The top-down
>                 solution is good airflow
>                 > management.
>                 >
>                 > The picture is of the ductwork in the Funtana I am
>                 doing for FM.
>                 > The subject is modifying the plane for
>                 high-performance electric. (high heat and
>                 > RF generation)
>                 > The airbox in the front of the cowl encloses the
>                 front of the motor,
>                 > and feeds the internals and the 1/8" gap in the duct
>                 with high pressure air.
>                 >
>                 >
>                 > later,
>                 > Dean
>                 >
>                 > Dean Pappas
>                 > 
>
>     Attached Message
>     From: 	Dean Pappas <d.pappas at kodeos.com>
>     To: 	NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>     Subject: 	Re: [NSRCA-discussion] Reducing the odds...
>     Date: 	Tue, 28 Mar 2006 18:19:00 +0000
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org <mailto:NSRCA-discussion%40lists.nsrca.org>
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org <mailto:NSRCA-discussion%40lists.nsrca.org>
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [NSRCA-discussion] Reducing the odds...
> From:
> rcmaster199 at aol.com
> Date:
> Wed, 29 Mar 2006 01:14:17 +0000
> To:
> nsrca-discussion at lists.nsrca.org
>
> To:
> nsrca-discussion at lists.nsrca.org
>
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>------------------------------------------------------------------------
>
>_______________________________________________
>NSRCA-discussion mailing list
>NSRCA-discussion at lists.nsrca.org
>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>