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silly question, what does it mean by "brake function?" - 10/12/2012 4:10 AM   
G2A2 Raditz


 

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From: , MB, CANADA
Status: offline 		In my book it keeps referring to "brake function" for my model aircraft. Which has an electric motor.

What does it mean by "brake function?"

For example: "To set the brake function on do this..."

I'm just confused on the basics,  the book speaks like i already know what the brake function is.

Any help means ALOT thanks!


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RE: silly question, what does it mean by - 10/12/2012 4:28 AM   
alan0899


 

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From: AttungaNSW, AUSTRALIA
Status: offline 		G'day Mate,
The brake function on an ESC, is used to stop the prop, so it doesn't windmill.
very handy for sailplanes, with folding props.
Probably don't need it on most planes with fixed props.

Cheers

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RE: silly question, what does it mean by - 10/12/2012 5:45 AM   
Bozarth


 

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Status: offline 		I have also found that I like the brake function set to on for the few e-gliders that I try to catch instead of landing in the weeds. Even a windmilling prop is a little disconcerting.

Kurt

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RE: silly question, what does it mean by - 10/12/2012 12:59 PM   
CGRetired



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Status: offline 		This also occurs with any prop when it is turning slower than it would to maintain speed (thrust). So, it acts as a brake.. adds drag and slows the plane down. Pattern pilots like this function because they can control speed better when using props selected for more drag during deceleration.

Generally speaking, the drag will increase with length but decrease with pitch (the more pitch, the less drag). There was a study done on the subject, and if you are interested, take a look here... http://www.peter2000.co.uk/aviation/misc/prop.pdf

It's a tad bit complicated, but informative.



CGr.

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RE: silly question, what does it mean by - 10/12/2012 4:30 PM   
BarracudaHockey



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Status: offline 		Yup, its for gliders with folding props to reduce drag when you shut the motor off to thermal.

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