Search: Posts Made By: ron_van_sommeren
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Forum: Beginners
07-02-2022, 05:35 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

It is a good practice to have some headroom built...

It is a good practice to have some headroom built in. Motor runs cooler, slightly more efficient too, and you have some leeway should things go south a bit.
About derating motors, controllers,...
Forum: Beginners
06-30-2022, 10:07 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Or use an outrunner disguised as an inrunner. ...

Or use an outrunner disguised as an inrunner.

AXI Cyclone series
www.modelmotors.cz/product/axi-cyclone-new (http://www.modelmotors.cz/product/axi-cyclone-new)...
Forum: Beginners
06-27-2022, 10:23 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Two of the three motorwires consecutively take...

Two of the three motorwires consecutively take turns (very fast) for providing motorpower, the third is used for measuring rotor rpm and position.
It's the motor that tells the controller when to...
Forum: Beginners
06-27-2022, 10:07 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Propblades moving close to a post, table top,...

Propblades moving close to a post, table top, wing leading/trailing edge?
High rpm?
Prop not balanced yet?


Let's hope your motor did not get too hot. Feeling/measuring the can/bell of an...
Forum: Beginners
06-24-2022, 05:44 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

You typed a bit too fast there, since resistive...

You typed a bit too fast there, since resistive losses are proportional to current squared (Ploss=I⋅Rcopper), power losses would go up by factor 3=9.


Yes, it would go up in smoke in a 1-2...
Forum: Beginners
06-23-2022, 07:14 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Below an excellent quote about motor selection...

Below an excellent quote about motor selection and powersystem misconceptions
From
brushless motors Kv? ('https://www.rcgroups.com/forums/showthread.php?2083459-brushless-motors-kv').
Forum: Beginners
06-23-2022, 06:26 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

A much faster method Find same/similar plane...

A much faster method
Find same/similar plane (type, mass, span) and copy the successful power system. That way you can fly and rummage/read through the engineering stuff (I know those...
Forum: Beginners
06-22-2022, 09:58 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Best to take advertised C-ratings with a grain of...

Best to take advertised C-ratings with a grain of salt, some are downright silly, if not risky. I would half them at least by factor two.

About C-ratings, stickertuning and other blatant lies....
Forum: Beginners
06-22-2022, 09:55 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Some well-structured reading for rainy/windy...

Some well-structured reading for rainy/windy days, including e-flight_101 & 102, and some handy e-tools. Don't try to read, take it in, all at once, as long as you know/remember were to find the...
Forum: Beginners
06-21-2022, 10:18 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

It's only exponentiation :) That's where...

It's only exponentiation :)
That's where e-calculators (https://www.rcgroups.com/forums/showthread.php?606703-e-flight-calculators-%28compilation%29) come in handy.
But, as with all software,...
Forum: Beginners
06-21-2022, 07:30 PM
Replies: 29
Views: 1,663
Posted By ron_van_sommeren

Some info to reduce your trial and error process...

Some info to reduce your trial and error process a bit.

Current and power drawn are proportional to velocity_konstant_Kv (http://bavaria-direct.co.za/constants/#Kv) :eek::eek::eek:
That is...
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