REFLECTOR:BMA Autopilot

Tom Martino reflector@tvbf.org
Wed, 14 May 2003 17:14:21 -0600


"Old Ways" also need the same amount of testing ... since "Old Ways" in
experimental aircraft are really not "Old Ways". Aside from components
made at the factory or jigged to exacting standards, all things in
experimental aircraft are new to a degree.

Just take a look at completed aircraft and you'll see that they're all
"one of a kind".

You'll also find that most experimental aircraft factories do not have
ANY R&D departments.  I'd venture to say that many innovations have come
from customers.



 

-----Original Message-----
From: Scott Derrick [mailto:scott@tnstaafl.net] 
Sent: Wednesday, May 14, 2003 4:56 PM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:BMA Autopilot

My limited experience of doing things a "new" way is that "new" ways 
have the potential to suprise you in the darndest ways.

I agree with you that it sounds like a good idea but flight testing is 
the real judge. And many hours of flight testing the ultimate judge.

Scott

Tom Martino wrote:
> Flexible rods have been used in many aircraft for control.  They are
identical to the ones used in the velocity.  The servos move it with
ease.  It actuates the elevator.  Short of that ... what else do you
want?
>  
> Obviously it will only be as good as the auto pilot system ... but the
actual movement is the same as any flight control.  As with all control
cables, the ends must be secure.  
>  
> I am not sure exactly what is "unsure" about the use of flexible
cables?
> 
> 	-----Original Message----- 
> 	From: S Baker [mailto:sbakr@bellsouth.net] 
> 	Sent: Wed 5/14/2003 11:40 AM 
> 	To: reflector@tvbf.org 
> 	Cc: 
> 	Subject: Re: REFLECTOR:BMA Autopilot
> 	
> 	
> 
> 	Tim and all ...
> 	A push-pull cable may seem like a good idea, but I would reserve
judgment
> 	until it has been flight tested and confirmed that everything is
working
> 	"according to plan".   The rigid rod arm design, we know, works.
> 	Best regards,
> 	Scott B.
> 	
> 	
> 	
> 	----- Original Message -----
> 	From: "Tom Martino" <tmartino@troubleshooter.com>
> 	To: <reflector@tvbf.org>
> 	Sent: Wednesday, May 14, 2003 1:19 AM
> 	Subject: RE: REFLECTOR:BMA Autopilot
> 	
> 	
> 	> The pitch servo can be mounted on the top of the canard (along
side the
> 	> trim actuator).  Many use a push rod that activates a coupling
on the
> 	> torque tube ... but I found a better way.
> 	>
> 	> I simply ordered a three foot push-pull control cable (similar
to the
> 	> ones that we use on our ailerons) ... and hooked it up.  I
simply looped
> 	> it around the canard on onto the same place that the pitch
control tube
> 	> mounts to ... it works great.
> 	>
> 	> The roll servo can go aft of the keel on the floor on the
pilot side,
> 	> with a push rod hooking to the aileron bellcrank.
> 	>
> 	>
> 	>
> 	> -----Original Message-----
> 	> From: -LD [mailto:jldortch@prp.org]
> 	> Sent: Monday, May 12, 2003 1:24 PM
> 	> To: reflector@tvbf.org
> 	> Subject: REFLECTOR:BMA Autopilot
> 	>
> 	> Has anyone installed the Blue Mountain Avionics autopilot
servos in a
> 	> standard RG? If so, where and got any pix?
> 	>
> 	> John Dortch N83AD
> 	>
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