NEWEST "Pattern Field Equipment"

Sat Feb 12 16:01:50 AKST 2005

On Feb 12, 2005, at 5:24 PM, Dean Pappas wrote:

> I once saw a NiCad electric catch fire ... well actually set fire to 
> the grass, after a crash and short. It was a 60-sized e-pattern model 
> done by sometimes IMAC and Pattern competitor Bob Afflerback, but at 
> the time he was writing the e-flight column in Flying Models. The 
> batteries were re-used after the new heat shrink was applied.
>
> In the future, if the ailerons go dead, slow up, pull the nose up, and 
> use the heck out of the rudder. I watched a Pattern flier save a ship 
> that way, once, a long time ago. Let's put it this way, I was a 
> teenager, at the time. Of course, his ailerons were at neutral.

Let's see:  Dean was a teenager, so transistors had been invented, but 
surface mount technology wasn't here yet.  That must have been about 
1968.  How'm I doing so far Dean?

Ron Van Putte

> 	-----Original Message-----
> 	From: discussion-request at nsrca.org on behalf of Steve & Cindy Kessler
> 	Sent: Fri 2/11/2005 7:51 PM
> 	To: discussion at nsrca.org
> 	Cc:
> 	Subject: Re: NEWEST "Pattern Field Equipment"
> 	
> 	
>
> 	Dean,
> 	
> 	I had a brain fart and forgot to plug in my ailerons.  The plane had a
> 	gentle roll over on takeoff and went in at a 30deg angle.  The nose 
> of the
> 	plane broke off and the batteries impacted the front of the cowling.  
> One
> 	battery pack shorted and caught fire.  Except for the loss of the 
> plane and
> 	battery, I gained something.  I have a heavy respect for the fire 
> potential
> 	of any LiPo.  With proper handeling, I believe they are safe.
> 	
> 	Steve
> 	----- Original Message -----
> 	From: "Dean Pappas" <d.pappas at kodeos.com>
> 	To: <discussion at nsrca.org>
> 	Sent: Friday, February 11, 2005 1:03 PM
> 	Subject: RE: NEWEST "Pattern Field Equipment"
> 	
> 	
> 	Hello Steve,
> 	It's time for the post crash investigation:
> 	Caught on fire during takeoff?
> 	Is there any more data you can offer us?
> 	Did something questionable happen to the battery just prior?
> 	
> 	signed,
> 	Curious in Joisey
> 	
> 	
> 	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: discussion-request at nsrca.org
> 	[mailto:discussion-request at nsrca.org]On Behalf Of Steve Kessler
> 	Sent: Friday, February 11, 2005 2:01 PM
> 	To: discussion at nsrca.org
> 	Subject: Re: NEWEST "Pattern Field Equipment"
> 	
> 	
> 	>I crashed my first electric Eclipse on take-off.  One of the 5s3p 
> 6000ma
> 	batteries caught on fire.  The fire reminded me of a magnesium fire I 
> saw
> 	in the lab.  Boy it sure was hot and intense.  The ceramic battery 
> bunker
> 	is OK for the small Rx and foamy LiPo's.  For the larger batteries, I
> 	suggest you use a clay pot and possibly use the water tray as a lid.  
> I
> 	never charge my small LiPo's in the house unless I watch the units.  
> In
> 	this case they are on the work bench with nothing around them.  For my
> 	6000ma LiPo's, I always charge them in the garage in a clear area.
> 	Again, I never leave the charger until I know the charger has 
> recognized
> 	the proper cell count and is charging at a voltage I would expect.  
> The
> 	current series of chargers, such as the Astro Flight 109 do a good 
> job.
> 	
> 	Bottom line is protect your self in case of a fire.  Never leave the
> 	charger unattended until you verify the proper charge voltage.  Just 
> my
> 	$0.02 worth.
> 	
> 	Steve
> 	
> 	
> 	> Ohhh, It Is!!! The aramid inside is flame suppresant and bullet 
> stopper.
> 	> You
> 	> know, schrapnel that will eventually come from a battery explosion.
> 	> Developing the molds as we speak. Nuthin but the good composites 
> for our
> 	> brethren and
> 	> sistern. Question is, should they have screw on, airtight lids or  
> should
> 	> these be designed to blow off??
> 	>
> 	> Forget about those silly, tricky and fragile ceramics. Drop one of 
> them on
> 	> your foot brother--weeeeeooowwwww!! I garrownteee.
> 	>
> 	> Geez must be a slow Friday. Either that or Im going stir crazy and 
> finally
> 	> lost the last half marble. Where is that Ocala contest when you 
> need it
> 	>
> 	> Matt
> 	>
> 	>
> 	> ssage dated 2/11/2005 11:48:53 AM Eastern Standard Time, 
> vanputte at cox.net
> 	> writes:
> 	>
> 	>
> 	> On  Feb 11, 2005, at 7:47 AM, Rcmaster199 at aol.com wrote:
> 	>
> 	>> Of course  there is. A carbon composite actually. Someone realized
> 	>> carbon burns  almost as hot as the Lithium does when ignited so 
> there's
> 	>>  siliconised Kevlar/Nomex aramid on the inside and Carbon on the
> 	>>  outside. It also double serves as a bullet proof bunker.  (BG)
> 	>
> 	> Geez!  Matt had me going for a while there.  It started  out 
> sounding
> 	> like something all true Patten pilots must have.
> 	>
> 	> Ron  Van Putte
> 	>
> 	>
> 	>
> 	>
> 	
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