Re: [Paparazzi-devel] Reply to"On Screen Display (Reto Buettner)(Rui Costa)"

[Chris Gough]

I absolutely agree, our goal is not to maximise safety, it is to
compete successfully. If the rules called for square wheels we would
use them.

Redundant servos/receivers is a good idea. We also talked about
ganging them together, but decent servos don't fail often, were are
more focused on avoiding flight termination scenarios at the moment
(loss of GPS, loss of data link, etc).

Chris Gough

On Thu, Aug 4, 2011 at 8:29 PM, Reto Büttner <address@hidden> wrote:
> The newest Penguin UAV airframe has four rudder surfaces on its inverted 
> v-tail. That configuration should be able to handle any servo failure.
>
> But in general I agree very much to Marks recommendation of simplicity. To 
> all my experience it is a lot safer to keep the UAV simple, robust, well 
> tested, well operated and well maintained. Mostly you detoriate your systems 
> reliability by adding additional "safety" devices.
>
> Cheers, Reto
>
> Am 04.08.2011 um 10:35 schrieb <address@hidden>:
>
>> What if the elevator servo fails?
>> Doesn't matter what failsafe device you have, it can't rectify a failed
>> servo.
>>
>> -----Original Message-----
>> From: address@hidden
>> [mailto:address@hidden On
>> Behalf Of Chris Gough
>> Sent: 04 August 2011 08:49
>> To: address@hidden
>> Subject: Re: [Paparazzi-devel] Reply to"On Screen Display (Reto
>> Buettner)(Rui Costa)"
>>
>>> Why don't you put about 100g of explosives with a separate receiver?
>>> I think NASA uses the same method?
>>
>> 100g is overkill, I don't need to destroy any evidence :) perhaps few
>> grams of nichrome wire and a relay could pop the heads off nylon wing
>> bolts...
>>
>> For the competition, we are required to kill the motor and spiral into
>> the ground with aileron and rudder at maximum deflection. The
>> organisers (or their insurers) obviously think "flyaway" is a worse
>> risk than diving into a competitor/spectator/innocent kangaroo.
>>
>>
>> On Thu, Aug 4, 2011 at 4:08 PM, Chris Efstathiou <address@hidden>
>> wrote:
>>> Just joking now...
>>> Why don't you put about 100g of explosives with a separate receiver?
>>> I think NASA uses the same method?
>>> Chris
>>>
>>>
>>> _______________________________________________
>>> Paparazzi-devel mailing list
>>> address@hidden
>>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>>
>>>
>>
>>
>>
>> --
>> .
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>>
>> _______________________________________________
>> Paparazzi-devel mailing list
>> address@hidden
>> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel
>



-- 
.