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Concept  of the Cobra Strike (BR-x000)

 

In January 2009 I was working on building a new version of the BR-X000 Buck Rogers Earth Reliance Fighter (ERF) micro model for a Micro Pusher contest in RC Groups forum. From this different wing configuration came when investigating a flying model prototype for the micro model. As always I played with the idea of using the ERF as the base for building a wing and to work out the control surfaces. This exercise provided me the data to make a flying model for the micro scale contest. Unfortunately  I concluded this was not going to work for the contest, however the Cobra Strike was conceived.

As a concept design this model of 10' dose glide well and will provide the starting point of building a model kit in time.

 

     
 
 

   
 
 

Inspiration

The inspiration was from my mistakes. Don’t you ever get those?  Really … I was attempting to use the configuration from the ERF to asses the flight control surfaces and modification came into order to accommodate the processes of developing access for the controls mechanisms.

One thing lead to another and the first prototype was built to prove flying with control for my first micro design.  This proves to be challenging due to my ignorance with this type of scale and use of micro components.  I decided to stay with DEPRON for ease of building reasons and weight.

Design

The design process was mostly done in CAD to get the components to work in a configuration intended. This then invoked some new strategies to accommodate the restrictions and the work around for making things work.  I was having difficulty with making the control surfaces to work. After several attempts this last configuration worked best on the prototype 001. The original prototype did start with the wing configuration closest to the ERF and then changed due to weight   dictating unstable blights I attempted to relieve the dilemmas I was encountering by removing some wing surfaces, this helped.

It was in the CAD design process I identified with the plan profile it resembled to a cobra snake and this inspired me to name it the Cobra Strike. I was not satisfied with the construction details and wanted to incorporate more of lifting body into the design by introducing lifting body characteristics into the canopy body, this would also add to a larger working compartment for the gear.

Some of the more innovating outcome in this design was the use of wing surfaces and complimentary geometry to achieve them. Looking at different angles it has a unique characteristic of commanding a charge as to attack hence Cobra Strike.

I have several options in the future in addressing the mode of propulsion.  It may conclude to be the ultimately the vector trust assembly that will be used on the ERF I am presently working on.

I have built in 3D 3 prototypes and only two of them where built as micro scale models and only the first prototype is equipped with hardware.  I think for the Cobra Strike prototype 003 will be built with a pusher prop configuration to assess further development.  Another configuration consideration is to place two duct fan units in the mid section of the tail in-between the top and bottom tail winglets, and the last and most probable will be the vector trusting mechanism presently developing.

 

 

 


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