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Search: Posts Made By: ron_van_sommeren
Forum: Power Systems Yesterday, 03:05 PM
Replies: 24
Views: 8,053
Posted By ron_van_sommeren
And a contrarotating prop by itself is already...

And a contrarotating prop by itself is already (very) noisy, for the same 'siren' reason.

Place motor higher or lower than trailing edge, that way the prop will 'slice' across the trailing edge,...
Forum: Beginners 10-15-2014, 12:36 PM
Replies: 8
Views: 175
Posted By ron_van_sommeren
For a rainy day(s) E-flight 101 by RCG...

For a rainy day(s)

E-flight 101 by RCG member Ken Myers, will at least save you a ruined LiPo (or worse!), a burnt motor and a fried ESC:
The Ampeer (http://www.theampeer.org/framesefo.html)
->...
Forum: Brushless Motor Construction 10-14-2014, 01:18 PM
Replies: 4
Views: 129
Posted By ron_van_sommeren
Forum Title: Brushless Motor Construction ...

Forum Title: Brushless Motor Construction
Subtitle: Discuss design and construction of custom Brushless motors
Forum: Brushless Motor Construction 10-14-2014, 01:17 PM
Replies: 6
Views: 126
Posted By ron_van_sommeren
ForumTitle: Brushless Motor Construction ...

ForumTitle: Brushless Motor Construction
Subtitle: Discuss design and construction of custom Brushless motors
Forum: General Electric Discussions 10-08-2014, 07:08 PM
Replies: 13
Views: 278
Posted By ron_van_sommeren
http://www.modelbouwforum.nl/forums/images/smilies...

http://www.modelbouwforum.nl/forums/images/smilies/thumbsup.gif

I know of one Dutch motor (re)winder who tests insulation breakdown voltage after (re)winding with 500 (1000?) volt.
His high(er)...
Forum: General Electric Discussions 10-08-2014, 12:40 PM
Replies: 13
Views: 278
Posted By ron_van_sommeren
The Kv constant is not a rating Mark, not a...

The Kv constant is not a rating Mark, not a figure of merit, it's just a characteristic. More windings will give lower Kv, less windings will give higher Kv, that's all there is to it. No big deal,...
Forum: General Electric Discussions 10-08-2014, 12:31 PM
Replies: 13
Views: 278
Posted By ron_van_sommeren
Nah, if all e-beginners would read that, several...

Nah, if all e-beginners would read that, several motor- and controller-manufacturers would go belly up :D
Your e-flight FAQ/introduction and a watt-meter, must have's :)
Forum: General Electric Discussions 10-04-2014, 05:36 PM
Replies: 12
Views: 284
Posted By ron_van_sommeren
What current did you measure?

What current did you measure?
Forum: General Electric Discussions 10-04-2014, 01:40 PM
Replies: 12
Views: 284
Posted By ron_van_sommeren
1 - Neodymium magnets start to weaken...

1 - Neodymium magnets start to weaken (permanent!) above 80C. Weaker magnets result in a higher Kv.
2 - Motorcurrent wants to go up with Kv cubed, and with voltage squared (way more/faster than one...
Forum: Power Systems 09-28-2014, 03:45 PM
Replies: 15
Views: 260
Posted By ron_van_sommeren
And too long battery wires will kill ESC over...

And
too long battery wires will kill ESC over time: precautions, solutions & workarounds - RCG (http://www.rcgroups.com/forums/showthread.php?t=952523)
Forum: Electronic Builders Workshop 09-19-2014, 10:53 PM
Replies: 13
Views: 237
Posted By ron_van_sommeren
Sticky: e-flight calculators (compilation)...

Sticky: e-flight calculators (compilation) (http://www.rcgroups.com/forums/showthread.php?t=606703)

Notably Drive Calculator, Scorpion Calc and derivatives, E-Calc. E-Calc is not freeware.

FAQ...
Forum: Electronic Builders Workshop 09-19-2014, 12:55 AM
Replies: 13
Views: 237
Posted By ron_van_sommeren
Sorry Fred, I did not mean do belittle you (or...

Sorry Fred, I did not mean do belittle you (or other people in the past), but how would someone less motor-knowledgable then you and I interpret this quote? I don't want TS to get the wrong idea,...
Forum: Electronic Builders Workshop 09-19-2014, 12:12 AM
Replies: 13
Views: 237
Posted By ron_van_sommeren
The Kv constant is not a rating, not a figure of...

The Kv constant is not a rating, not a figure of merit, it's just a characteristic. More windings will give lower Kv, less windings will give higher Kv, that's all there is to it. No big deal, anyone...
Forum: Brushless Motor Construction 09-18-2014, 12:32 PM
Replies: 20
Views: 388
Posted By ron_van_sommeren
Art, if I were you, I'd remove/mutilate your...

Art, if I were you, I'd remove/mutilate your e-mail address in your signature, before the spammers find you: art curl rc-wingman dot com.
People can use the forum private messages...
Forum: Scratch and Kit Built Aircraft 09-06-2014, 03:28 PM
Replies: 18
Views: 661
Posted By ron_van_sommeren
www.rbckits.com

www.rbckits.com
Forum: Batteries & Chargers 08-21-2014, 08:39 PM
Replies: 7
Views: 342
Posted By ron_van_sommeren
Charger tests, including the 206B ...

Charger tests, including the 206B
translate...www.elektromodellflug.de...
Forum: Batteries & Chargers 08-19-2014, 01:48 AM
Replies: 7
Views: 342
Posted By ron_van_sommeren
For playing a bit with the currentlimits for...

For playing a bit with the currentlimits for chargers, for given number of cells, per type/make
www.scriptasylum.com (http://www.scriptasylum.com/)
-> RC calculations...
Forum: Power Systems 08-11-2014, 12:37 AM
Replies: 1
Views: 152
Posted By ron_van_sommeren
Try the Electronic Builders Workshop...

Try the Electronic Builders Workshop (http://www.wattflyer.com/forums/forumdisplay.php?f=32) subforum.
Forum: Power Systems 08-06-2014, 11:11 AM
Replies: 3
Views: 205
Posted By ron_van_sommeren
Keep in mind Brian that ... The Kv constant...

Keep in mind Brian that ...

The Kv constant is not a rating, not a figure of merit, it's just a characteristic. More windings will give lower Kv, less windings will give higher Kv, that's all...
Forum: Power Systems 08-05-2014, 11:07 PM
Replies: 9
Views: 275
Posted By ron_van_sommeren
What about helicopters then? Both motor and rotor...

What about helicopters then? Both motor and rotor shaft are vertical instead of horizontal. Not to mention belt reduction versus gear reduction and single stage versus double stage reduction. And...
Forum: Power Systems 08-05-2014, 03:36 PM
Replies: 9
Views: 275
Posted By ron_van_sommeren
There are 3 2 = 6 ways to hook up the...

There are 3 2 = 6 ways to hook up the motorwires, 3 of them will make the motor run CW, 3 of them will run motor CCW.

I kindly suggest you NEVER EVER visit Las Vegas, it would wreak havoc with...
Forum: Foamies 07-31-2014, 12:39 PM
Replies: 8
Views: 339
Posted By ron_van_sommeren
If motor runs in wrong direction, switch any two...

If motor runs in wrong direction, switch any two of the three motorwires to reverse rotation.
Forum: Power Systems 07-31-2014, 12:31 PM
Replies: 12
Views: 640
Posted By ron_van_sommeren
Typo Denny? Should be HP = P * D^4 * RPM^3 /...

Typo Denny? Should be
HP = P * D^4 * RPM^3 / 1.4E17
using superscript
HP = P * D^4 * RPM<sup>3</sup> / 1.4E17
Forum: Power Systems 07-30-2014, 12:02 PM
Replies: 12
Views: 640
Posted By ron_van_sommeren
Keep in mind that ... A motors Kv constant...

Keep in mind that ...

A motors Kv constant says nothing about max.power, max.current, efficiency, rpm, quality etc. (http://www.rcgroups.com/forums/showthread.php?t=2131492)
The Kv constant...
Forum: Power Systems 07-26-2014, 01:25 PM
Replies: 12
Views: 640
Posted By ron_van_sommeren
This is the Brushless Motor Construction...

This is the Brushless Motor Construction (http://www.wattflyer.com/forums/forumdisplay.php?f=88) subforum. You'll get more viewers/answers in the Power Systems...
Forum: Off Topic Chit Chat 07-23-2014, 01:49 PM
Replies: 12
Views: 475
Posted By ron_van_sommeren
Lovely engines. What's the colour coating...

Lovely engines. What's the colour coating material in the cylinder heads Chellie?

BTW I have read about brake fluid as cleaner.
Forum: Beginners 07-19-2014, 06:31 PM
Replies: 10
Views: 290
Posted By ron_van_sommeren
Lucien Miller (Scorpion USA...

Lucien Miller (Scorpion USA (http://http://www.innov8tivedesigns.com)) about derating (http://https://en.wikipedia.org/wiki/Derating) for motors, controllers, batteries and electronics, starting at...
Forum: Off Topic Chit Chat 07-16-2014, 12:31 PM
Replies: 55
Views: 2,247
Posted By ron_van_sommeren
RCG made a mistake, they corrected it, all 25 of...

RCG made a mistake, they corrected it, all 25 of them ;), with the help of people in this WFF thread.
Everybody happy :)

I cannot reply in Nigel's RCG thread, otherwise I would have mentioned it...
Forum: Off Topic Chit Chat 07-15-2014, 11:04 PM
Replies: 55
Views: 2,247
Posted By ron_van_sommeren
25 messages from RCG :) Boldface by me. ...

25 messages from RCG :)
Boldface by me.

Again, thank you guys&girls for your support and pats on the back.
Forum: Off Topic Chit Chat 07-15-2014, 01:00 PM
Replies: 55
Views: 2,247
Posted By ron_van_sommeren
Thank you guys&girls, and notably Nigel :) ...

Thank you guys&girls, and notably Nigel :)

Posting identical messages in response to similar (opening) posts is not cross-posting. I had already reported dailydigitaldeals spam several times,...
Showing results 1 to 30 of 500

 
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