[NSRCA-discussion] Reducing the odds...

[jeffghughes at comcast.net]

I guess it's true, great minds think alike! :) Anybody know if it works?

-------------- Original message -------------- 
From: Chad Northeast <chad at f3acanada.org> 

> 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 
> > Mailing List 
> > 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" 
> > 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" 
> > 
> > > 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 
> > To: NSRCA Mailing List 
> > Subject: Re: [NSRCA-discussion] Reducing the odds... 
> > Date: Tue, 28 Mar 2006 18:19:00 +0000 
> > 
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> > 
> > ------------------------------------------------------------------------ 
> > 
> > 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 
> > 
> > 
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