Electric Weight: with or without batteries at US Nationals

Fri Jun 10 14:00:56 AKDT 2005

Adam,

So roughly 2.5 lbs.  Any additional 'stuff' added that goes in the airplane?
On the FMA/Kokam units, they have cell discharge protection devices that
weigh like 3.5 oz/ set.  I'm sure for production they'll get the wt down.
Ea. pair weighs about 2 lbs,1 oz. plus the DPMs.  I get a pattern plus a
couple passes and it's time to land.  I've got about 20 cycles on three sets
now with no noticable losses.  Orland has tried the 4000s and is getting
about 9.5 minutes which is nicely adequate but weigh another .5 lb.  I just
don't think there's another half pound to wring out of my existing ships!
If you or someone would weigh them--I'd sure like to know if reality is the
same as advertised--pro OR con.

Richard

----- Original Message -----
From: "Adam Glatt" <adam.g at sasktel.net>
To: <discussion at nsrca.org>
Sent: Friday, June 10, 2005 3:57 PM
Subject: Re: Electric Weight: with or without batteries at US Nationals

> We don't have an accurate scale at work, so the only figures I have are
> direct from Thunder Power's website:
> http://thunderpower-batteries.com/html/batteries.html
> showing 560 grams each.
>
> -Adam
>
> Richard Strickland wrote:
>
> >Hey Adam,
> >
> >How much does a set weigh with any associated harness?
> >
> >Thanks,
> >
> >Richard
> >----- Original Message -----
> >From: "Adam Glatt" <adam.g at sasktel.net>
> >To: <discussion at nsrca.org>
> >Sent: Friday, June 10, 2005 9:02 AM
> >Subject: Re: Electric Weight: with or without batteries at US Nationals
> >
> >
> >
> >
> >>Jim, the Thunder Power 5s4p 5300 pack is in stock with free courier
> >>shipping at parts.rctoys.com .
> >>
> >>I'm using a 6.0v regulator (JR servos) with my 2s lipo receiver pack,
> >>and used a mere 290mAh in 51 minutes of flight yesterday.  My fellow
> >>team members are using Futaba servos with a 5.6v regulator, and seeing
> >>50-60mAh per a 10 minute flight.  You can definitely cut receiver
> >>battery weight.  My TP 2s730 weighs 31g.
> >>
> >>BTW, in Canada we changed our rules this year such that electric pattern
> >>planes are weighed without the battery that powers the motor.
> >>
> >>If you want a killer deal on the 2s730 with a 5300 order, ask for me ;>
> >>
> >>-Adam
> >>
> >>Jim_Woodward at beaerospace.com wrote:
> >>
> >>
> >>
> >>>RS - Although I have taken GREAT care with the airframe weight of the
> >>>Impact, I have used a non-exotic equipment list, so I am at 11 lbs,
> >>>4.5 oz with 6000 mah TP packs (2, 5S,3P).  I did not use aluminum
> >>>wheel axles, nor replace the wheel pants, nor replace the heavy wing
> >>>tube.  Also, I used the Futaba 9152 monster servo for the rudder.
> >>> Also, I'm using the stock steel prop nut and spinner jam nut.  So, I
> >>>used very standard equipment, and still came close to making the
> >>>weight.  A quick solution is to purchase (if available), the 5300 mah
> >>>packs, which in itself drops 4-5 oz I've heard.  Dropping even 5 oz
> >>>may be possible just with some equipment changes.  The airframe really
> >>>not going to get any lighter, except some more trimming of the chin
> >>>cowl flanges.  I'm happy with the build and got close to the weight
> >>>limit with a very standard equipment set.  Also, using the 2 cell
> >>>Li-ion, 2200 mah battery.
> >>>
> >>>I've heard that they may change the electric weighing procedures such
> >>>that the battery is removed at this years nats, but looking for
> >>>confirmation before I spend a bunch more cash.
> >>>
> >>>Thanks,
> >>>Jim
> >>>
> >>>James Woodward
> >>>Program Manager
> >>>B/E Aerospace Business Jet Group - Miami
> >>>9100 N.W. 105th Circle
> >>>Miami, FL 33178
> >>>(305) 459-7155  Office
> >>>(305) 459-7185  Fax
> >>>(954) 319-0873  Cellular
> >>>
> >>>
> >>>*"Richard Strickland" <richard.s at allied-callaway.com>*
> >>>Sent by: discussion-request at nsrca.org
> >>>
> >>>06/10/2005 09:31 AM
> >>>Please respond to
> >>>discussion at nsrca.org
> >>>
> >>>
> >>>
> >>>To
> >>><discussion at nsrca.org>
> >>>cc
> >>>
> >>>Subject
> >>>Re: Electric Weight: with or without batteries at UN Nationals
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>ALUMINUM servo screws?  Man, you must REALLY be close!?!
> >>>
> >>>RS
> >>>----- Original Message -----
> >>>*From:* _Jim_Woodward at beaerospace.com_
> >>><mailto:Jim_Woodward at beaerospace.com>
> >>>*To:* _discussion at nsrca.org_ <mailto:discussion at nsrca.org>
> >>>*Sent:* Friday, June 10, 2005 7:56 AM
> >>>*Subject:* Electric Weight: with or without batteries at UN Nationals
> >>>
> >>>
> >>>Hi All,
> >>>
> >>>Does anyone happen to know what the weighing policy will be for
> >>>electric planes at the nats (with or without batteries)?
> >>>
> >>>Also - does anyone know the source for aluminum servo screws?
> >>>
> >>>Thanks,
> >>>Jim W.
> >>>
> >>>
> >>>
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> >list.
> >
> >
> >
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