Search: Posts Made By: ron_van_sommeren
Showing results 1 to 30 of 500
Search took 0.03 seconds.
Yesterday, 03:15 PM
Replies: 4
Views: 93
Posted By ron_van_sommeren

Newest scams and tips discussed in the sticky...

Newest scams and tips discussed in the sticky (https://en.wikipedia.org/wiki/Internet_forum#Stickying) threads in
Classifieds-RCG (https://www.rcgroups.com/classifieds-201/) → Trader Talk...
Forum: Beginners
07-02-2022, 05:35 PM
Replies: 29
Views: 483
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: 483
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: 483
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: 483
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...
06-25-2022, 05:44 PM
Replies: 5
Views: 14,112
Posted By ron_van_sommeren

Don't bother MedcinMn. Topicstarter has not...

Don't bother MedcinMn.
Topicstarter has not been active since fourteen minutes after his first and only post.

These one-post wonders, if not a spam-troll-bot, are the bane of RC fora.
Forum: Beginners
06-24-2022, 05:44 PM
Replies: 29
Views: 483
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: 483
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: 483
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: 483
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: 483
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: 483
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: 483
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...
Forum: Power Systems
06-12-2022, 02:01 PM
Replies: 2
Views: 208
Posted By ron_van_sommeren

Apart from battery voltage, voltage sag, power...

Apart from battery voltage, voltage sag, power and current readings you need rpm readings as well for debugging.
At full throttle, half throttle, with and without prop.
.
.
Possible causes,...
06-02-2022, 11:17 AM
Replies: 1
Views: 447
Posted By ron_van_sommeren

RC Soaring Digest is back :-)

Well, actually it has already been online since januari 2021 :oops:

Homepage, with a.o. older issues
new.rcsoaringdigest.com (https://new.rcsoaringdigest.com/)
Old homepage, a.o. archive of...
05-25-2022, 07:28 AM
Replies: 2
Views: 545
Posted By ron_van_sommeren

Your motor took a beating, core/winding...

Your motor took a beating, core/winding temperature was/is higher than 255 degrees rotor temperature. Winding wire lacquer has deteriorated :(
That white stuff looks as if it got spilled in...
05-22-2022, 11:55 PM
Replies: 21
Views: 3,770
Posted By ron_van_sommeren

???? Was your reply intended for this 2014...

????
Was your reply intended for this 2014 thread, or even this RC flight forum?
04-24-2022, 01:19 PM
Replies: 7
Views: 926
Posted By ron_van_sommeren

You could use a milliOhm meter, but they tend to...

You could use a milliOhm meter, but they tend to be expensive. Fortunately there are other methods for determining motor winding resistance (http://bavaria-direct.co.za/constants/#Rm) (Rm):...
04-24-2022, 12:07 PM
Replies: 7
Views: 926
Posted By ron_van_sommeren

A.k.a. Lucien Miller www.innov8tivedesigns.com...

A.k.a. Lucien Miller
www.innov8tivedesigns.com (http://www.innov8tivedesigns.com)
&
www.cobramotorsusa.com (https://www.cobramotorsusa.com/)

Lucien knows what he is talking about, good tech...
04-23-2022, 04:39 PM
Replies: 7
Views: 926
Posted By ron_van_sommeren

A bit more background information. ...

A bit more background information.

IC-engines and e-motors have fundamentally different behaviour.
An ic-engine tries to keep a constant torque.
As a result, as propeller load goes up, rpm must...
04-23-2022, 04:39 PM
Replies: 7
Views: 926
Posted By ron_van_sommeren

An e-traction forum: www.endless-sphere.com ...

An e-traction forum:
www.endless-sphere.com


Wheels need high torque, and therefore high current (torque = current Kt = current / Kv, in SI units) at zero/low rpm.
Whereas propellers don't...
04-22-2022, 11:55 AM
Replies: 7
Views: 926
Posted By ron_van_sommeren

A dear, an EE :D I've never seen Km...

A dear, an EE :D

I've never seen Km specified in RC land, not even the torque konstant Kt (= 1/Kv, conversion in SI units,...
04-22-2022, 11:44 AM
Replies: 3
Views: 787
Posted By ron_van_sommeren

A brushless motor will run exactly the same in...

A brushless motor will run exactly the same in reverse.
04-03-2022, 12:40 AM
Replies: 2
Views: 1,378
Posted By ron_van_sommeren

Topicstarter's last registered activity was has...

Topicstarter's last registered activity was has first and only post here.
03-31-2022, 11:30 PM
Replies: 2
Views: 1,378
Posted By ron_van_sommeren

Does your motor (battery, controller) have...

Does your motor (battery, controller) have headroom left? I.e. can your motor handle more power and current than it has to do now with current setup?
Then you could increase pitch and/or...
03-17-2022, 04:17 PM
Replies: 5
Views: 1,447
Posted By ron_van_sommeren

Are you familiar with these two channels? ...

Are you familiar with these two channels?
www.youtube.com/c/ChristophLaimer (https://www.youtube.com/c/ChristophLaimer), printing motors, bearings and props....
02-13-2022, 05:09 PM
Replies: 8
Views: 2,109
Posted By ron_van_sommeren

Servo/ESC connector pin outs: Older types ...

Servo/ESC connector pin outs:
Older types
www.rcgroups.com/forums/attachmentNew.php?attachmentid=4803665 (http://www.rcgroups.com/forums/attachmentNew.php?attachmentid=4803665)
Newer types...
Forum: Power Systems
02-06-2022, 08:31 PM
Replies: 2
Views: 1,686
Posted By ron_van_sommeren

Was the prop suggested by the kit manufacturer,...

Was the prop suggested by the kit manufacturer, or by the motor manufacturer? Always high propload with lowest voltage, to keep current in bounds.
What is motor velocity konstant Kv...
02-06-2022, 03:52 PM
Replies: 3
Views: 206
Posted By ron_van_sommeren

New 'member', with such a first post, such a...

New 'member', with such a first post, such a title and such a question/text, hmmmm ...
Here we go, it is a straight copy of this 2013 opening post:
www.wattflyer.com/forums/showthread.php?t=70208
Forum: Power Systems
02-05-2022, 06:16 PM
Replies: 8
Views: 1,553
Posted By ron_van_sommeren

Is it truly opto-isolated...

Is it truly opto-isolated (https://en.wikipedia.org/wiki/Opto-isolator), or HobbyKrap 'opto-isolated', i.e. just BEC-less?
HobbyKrap messing concepts up again, lying about what opto-isolated truly...
Showing results 1 to 30 of 500
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.07834 seconds with 7 queries