Looking for light servo extensions: ABBRA

[vicenterc at comcast.net]

Jon:

Remember that this is gas engine.  However, I will use you idea in my plane.  I am using the OS160 in my ABBRA.

Thanks much,

Vince

-------------- Original message -------------- 

I save 3/4 oz. buy changing the propnut, washer and spinner jam nut to a lighter configuration on my OS 1.60 setups.  Used a grade 5 nut from a hardware store, with a Dave Brown short spinner adapter with the waher that comes with his adapter.  The OS stuff is HEAVY!  Also used the light backplate.

Jon Lowe
 
-----Original Message-----
From: Ron Van Putte <vanputte at cox.net>
To: discussion at nsrca.org
Sent: Fri, 8 Apr 2005 14:00:29 -0500
Subject: Re: Looking for light servo extensions: ABBRA


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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