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Not a happy camper!

Old 08-15-2011, 04:15 PM
  #26  
MaxThrottle
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Default RE: Not a happy camper!

Ah ya skip my previous guess calculations cause those are not oval intakes they are semi circles and I would guess are much smaller than you originally estimated. Can't tell from pictures though.
Have fun investing in your Stu. To bad Velocity hasn't made their 90 sized unit yet because they handle narrow ducts better.
Old 08-15-2011, 04:47 PM
  #27  
Avaiojet
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Default RE: Not a happy camper!

Max,

Thanks for the reply.

To bad Velocity hasn't made their 90 sized unit yet because they handle narrow ducts better.
That's interesting! Now why is that? An engineering thing or RPM thing?

Hey, clever guy and good observation. The openings you see in these photos are small, and NOT what the finished airframe will have.

What you see in these photos, is nacelles which were reduced in size because the model was originally designed for a prop in the nose. I know, please forgive me. They are also sealed. Another fix.

As I did with the nose, I can now use actual scale outlines for the nacelles. The change is dramatic. This area is what I will fix next. Does involve a bit of work to get it right.

Thanks again,

Charles


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Old 08-15-2011, 05:17 PM
  #28  
MaxThrottle
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Default RE: Not a happy camper!

The Velocity system is a tri blade high rpm pusher. With less blades the load effect is different on the motor and with the higher rpm makes the best of a bad situation. Other designs have more static thrust but are also suited for dynamic ops. meaning you have good thrust for take offs or hand launches, verses having better thrust results while at maximum velocity. At full velocity a smaller intake down to about 85% can still work. But this takes up back to the opening question, why so many different types..... this is where you have to decide what performance range you are looking for and matching a drive train that best covers you ops. The Wemo and the Stumax are a good place to play. ExtremeRC can probably set everything up for you, you just have to put it in the best conditions.

If you are able to or are redoing the intakes then shape them to an area that fits the Stu 100mm leaving no other questions because you've optimizing the setup already.
Get a metric converter for yourself also. Its just easier.
Old 08-16-2011, 04:53 PM
  #29  
Avaiojet
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Default RE: Not a happy camper!

Max,

What can I say. As always thanks.

If you are able to or are redoing the intakes then shape them to an area that fits the Stu 100mm leaving no other questions because you've optimizing the setup already.
Get a metric converter for yourself also. Its just easier.
Yes, I'm doing just that, I'll have a photo.

And thanks again.

Charles

"Gimmie all eleven blades baby!"

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