[OSM-talk] DraganFly RC helicopters

Stefan de Konink stefan at konink.de
Sat Aug 15 00:35:59 BST 2009


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SLXViper schreef:
> Stefan de Konink wrote:
>> SLXViper schreef:
>>> This won't happen if you develop your own one ;)
>> We started with two and half Mikrokopter; the arrogance that we have
>> faced in that project. Unbelievable.
> 
> Additionally, mikrokopter has quite a lot of design flaws.

- - Electrical markup that is not documented because people could copy it
- - 5V / 12V overflows resulting into broken lanes with standard design
(elaborating how difficult it is to find a 'cut' if you don't have the
layout is not required I guess)
- - Recently I found out the compass provided is far to easy to influence

> Rather low-power brushless motors 

That is up to the builder, there are a dozen motors to choose from.

> and very sensitive controllers, chaotic software

The major problem is not the software, it is C for embedded stuff, trust
me the typical 8051 software on a creditcard is worse ;) The problem is
that they actually do not provide the full software package, aka; the
most important stuff regarding to secure flying the GPS aid is not
provided in code because they seem to be afraid the other 'commercial'
guys copy there code...

> and documentation, a not-so-good flight control, etc.

etc. lack of active debugging. Ignoring serious development request...


> The concept of a microcopter can be improved a lot as Draganfly shows...
> The main problem is that devoloping such a complex system is neither
> easy nor cheap.

Thankfully we always have people like Adam Williams of Cinelerra fame
building <http://vicacopter.com/> and a lot of other open source project
exist where people actually build stuff. But somewhere deep down inside
thought that if someone actually 'sells' stuff it would be at least 1.0...


Stefan
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