[NSRCA-discussion] Braking question

Tue Mar 1 12:55:21 AKST 2016

This is my first year flying electric. I DO have an Eagletree logger and I plan on taking some measurements with it when I set up my VF3-E. I’ll share any data with you guys that I think might be meaningful.

John Pavlick

Cell: 203-417-4971

idslogo2

Integrated Development Services

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of David Harmon via NSRCA-discussion
Sent: Tuesday, March 01, 2016 4:28 PM
To: 'John Fuqua'; 'General pattern discussion'
Subject: Re: [NSRCA-discussion] Braking question

Hi John….

I have flown the same motor, ESC and batteries in the same airplane trying to determine of there is any noticeable difference in the air and I cannot tell any difference.

Perhaps a timed ground run at partial throttle could determine how much MAH is used from the same battery if the test was repeated at various timing settings.

That would be interesting to see how that turns out.

I have used the same equipment at I believe 24 and 20 degrees as well and I could not determine any difference.

Perhaps any performance change would only be seen at full throttle…but then…we almost never use full throttle.

An Eagletree unit might be needed to really look into this.

Does anyone have any test data on varying the timing on these motors??

David Harmon

Sperry, OK

From: John Fuqua [mailto:johnfuqua at embarqmail.com] 
Sent: Tuesday, March 1, 2016 2:11 PM
To: 'David Harmon' <k6xyz at sbcglobal.net>; 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
Subject: RE: [NSRCA-discussion] Braking question

David

We have been running the Pletty at 20 degrees timing.   Can you tell me if there is any difference in performance?

John

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of David Harmon via NSRCA-discussion
Sent: Tuesday, March 01, 2016 12:35 PM
To: jpavlick at idseng.com; 'John Pavlick'; 'General pattern discussion'
Subject: Re: [NSRCA-discussion] Braking question

Hi John….could be but the OS 1100HV and Futaba MC 9100A work great without screeching or any other operational problems.

The brake is very effective and I have had the brake setting adjusted between 50 and 90 on various 2 and 3 blade props as large as a Mejzlik 22 x 12 2 blade and Mejzlik and Falcon 3 blades.

The hand held ‘loader’ is small enough to put into the transmitter case and you can make quick changes at the field between flights without a computer or other hardware.

Both ESC are clones to each other…they look exactly alike except for the mfgrs sticker.

The loader is also clone across both mfgrs and operationally are exactly alike….in fact I have only one loader and use it on both ESC.

All available at RC Japan….tower does not have them anymore because they said sales was too slow…arrgh

I am using the Plettenberg Advance motors at 15 degrees timing.

73

David Harmon

K6XYZ

Sperry, OK

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Pavlick via NSRCA-discussion
Sent: Tuesday, March 1, 2016 12:19 PM
To: 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
Subject: Re: [NSRCA-discussion] Braking question

The reason this is so touchy BTW is because you guys are using sensor-less brushless motors. Commutation takes place in the speed control. This works fairly well when the speed controller is driving the motor. When it’s the other way around however – not so much. I bet if someone came out with a motor that had position sensors and a really expensive speed controller to drive it, more people would get  interested in Pattern again… LOL

John Pavlick

Cell: 203-417-4971

idslogo2

Integrated Development Services

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of David Harmon via NSRCA-discussion
Sent: Tuesday, March 01, 2016 10:28 AM
To: 'Jon Lowe'; 'General pattern discussion'; 'Jamie'
Subject: Re: [NSRCA-discussion] Braking question

This is exactly my experience as well.

David Harmon

Sperry, OK

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Jon Lowe via NSRCA-discussion
Sent: Tuesday, March 1, 2016 7:48 AM
To: Jamie <jstrong49923 at gmail.com>; NSRCA <nsrca-discussion at lists.nsrca.org>
Subject: Re: [NSRCA-discussion] Braking question

ESC dependent. Castle ESC braking doesn't work well over 30% in my experience, without screeching. I set my OS controller at 65%, and it works fine. Jason goes as high as 90% with an OS. Some other controllers don't work well with braking at all, such as the YEP controllers from HobbyKing.

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