[NSRCA-discussion] Reducing the odds...

Chad Northeast chadnortheast at shaw.ca
Wed Mar 29 06:06:37 AKST 2006 

Jeff

Bernd Beschorner ran this setup in France...I have no numbers for the improvment in cooling but I know from my own experience when I took the spinner off and just let air enter the front of the motor it was a huge difference so it probably works quite well.

The other (cheaper) option is to get a plastic spinner that mounts with screws around the edges (great planes makes them I think) and simply cut a hole in the front of the spinner.  Remove as many spokes on the backplate as possible.

Rex L. also did a neat mod to his TT spinner that he say's works very well.

I think you will see a lot of good ideas for cooling outrunners coming this summer that are simple, low cost and effective....it just takes time for everyone to get the R&D done :)

Problem for myself is that with our climate cooling is not really an issue....we are lucky to see more than 80-85F for most of the year :)  Let me tell you, at 50-60F things stay very cool :)

Chad

----- Original Message -----
From: jeffghughes at comcast.net
Date: Wednesday, March 29, 2006 6:59 am
Subject: Re: [NSRCA-discussion] Reducing the odds...

> 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 
> > > [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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> > > 
> > > 
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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 
> > > 
> > > 
> > >_______________________________________________ 
> > >NSRCA-discussion mailing list 
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> > > 
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