Looking for light servo extensions: ABBRA

[Ron Van Putte]

On Apr 8, 2005, at 1:30 PM, Keith Black wrote:

> I agree with Chris.
>
> Other ideas (which you may already have done) to reduce weight for 
> NATS:
>
> 1. Lightened back-plate on the spinner.
> 2. Remove wheel pants.
> 3. Smaller fuel tank
> 4. Lithium battery
> 5. Remove voltage regulator if you're using one with 5 cell battery.
> 6. Remove switch and plug in each time powering on RX (really need 
> removable
> canopy for this).

You can also save about 2 oz. by using a carbon fiber wing tube in lieu 
of an aluminum one.

Substituting an aluminum gear with a carbon fiber one saves weight 
also.  The amount of weight saved depends on the design and fabrication 
of the carbon fiber gear..

Ron Van Putte

> ----- Original Message -----
> From: "Chris Moon" <a320flyr at hotpop.com>
> To: <discussion at nsrca.org>
> Sent: Friday, April 08, 2005 12:52 PM
> Subject: Re: Looking for light servo extensions: ABBRA
>
>
>> You can buy lighter gauge extensions, but with digital servos and long
>> runs, that might not be what you want to do as you will get a greater
>> voltage drop with the lighter wire when your servos are demanding 
>> large
>> amounts of current.  Personally, I would look somewhere else to save
>> weight.  I just switched my DuBro light weight 3" wheels for the super
>> light ones (soft foam) and saved 1oz per wheel.  Of course they won't
>> last as long, but it will help you will make weight.  Also, you can 
>> run
>> a smaller battery pack for competition.  Last yr at the NATS I 
>> switched
>> out my 1650nimh for a 650nimh and saved 2 oz.  I charged for safety
>> between rounds, but since you usually have some time that's not a big
>> deal.  I'm anxious to get a flight report as soon as it is in the air.
>>
>> Chris
>>
>> vicenterc at comcast.net wrote:
>>
>>> Hello all,
>>>
>>> I need suggestions to make servo extensions as light as possible. 
>>> This
>>> is for the new ABBRA with gasoline engine and we have the servos in
>>> the back to better balance the plane.  I think we can save some 
>>> weight
>>> if we can get very light servo extensions.  We are using 4 digital
>>> servos JR 3241 in the tail.  One for each elevator and two pull-pull
>>> configuration for the rudder.  The plane right now is about 6 oz over
>>> 11 pounds and we are looking for places to reduce the weight.
>>>
>>> Thanks,
>>>
>>> Vince
>>
>>
>>
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