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sunnyville · 11-07-2011, 07:56 AM

finally yes! Gonna make popcorn and enjoy!

tott · 11-07-2011, 11:42 AM

cbergen · 11-08-2011, 07:27 AM

Sorry guys, forgot the family was taking me out for a birthday dinner last night....

Will get the videos up today.

sunnyville · 11-08-2011, 07:35 AM

In that case, happy birthday!

tott · 11-08-2011, 11:34 AM

YES.....Happy Birthday.....CHRIS

Did you get a shinny new Bergen helicopter for your birthday ???? I know that is what most of us fellow FREAKERS would want.......lol

JASON

heli-trex · 11-08-2011, 05:37 PM

Happy Birthday Chris

:ch eers

aaron07 · 11-12-2011, 06:04 AM

So birthdays do take at least a week to celebrate.
I am excited to see this footage 8-)
I want to add this to my E-Observer.
When can we order this mod for our E-Observers?

cbergen · 11-14-2011, 08:15 AM

Pics of the wiring, should have the video of running it up uploaded shortly.

It has been a BUSY couple of weeks...

cbergen · 11-14-2011, 09:09 AM

Video up!!

[ame]http://www.youtube.com/watch?v=l6_5q9dcWmc[/ame]

nightflyr · 11-14-2011, 11:21 AM

Nice work Chris

That tail is a bit scary

sunnyville · 11-14-2011, 11:29 AM

God that tail went for you! Nice way to test if the gyro works! Can't wait to see videos of this in the air. I am guessing that is not too far off, considering the stage of the build in that video?

s_linste · 11-14-2011, 01:43 PM

How does the RPM on the tail vary? Do you set it manually?

CrayonBox · 11-14-2011, 02:52 PM

Quote:

Originally Posted by s_linste

How does the RPM on the tail vary? Do you set it manually?

I would think the rpm is constant (allowing for rpm reduction under load) and the blade pitch is altered for thrust as in convention setups.

cbergen · 11-14-2011, 03:23 PM

Exactly correct. The RPM is fixed for the most part. I did learn from testing on another bird that a mix is needed to add RPM with hard pitch changes such as a fast collective climbout or putting in a hard pirouette against main rotor torque. That mix will be sorted out once we get her hovering.

For this initial test, I intended for the pitch to be zero or centered, but apparently I moved it inadvertently, causing it to try to get me.

I'm just glad I didn't scream like I did at Paranormal Activity 3...

sunnyville · 11-14-2011, 03:31 PM

Quote:

Originally Posted by cbergen

I'm just glad I didn't scream like I did at Paranormal Activity 3...

Haha That would have been the best!

tott · 11-15-2011, 12:16 AM

Looks good Chris....Thanks for posting the update / video.....

JASON

cbergen · 11-15-2011, 03:44 PM

Internet went down right after I posted that vid, been working off of my MIFI from Verizon...

This sucks...

brtmac · 11-15-2011, 06:20 PM

Quote:

Originally Posted by cbergen

Exactly correct. The RPM is fixed for the most part. I did learn from testing on another bird that a mix is needed to add RPM with hard pitch changes such as a fast collective climbout or putting in a hard pirouette against main rotor torque. That mix will be sorted out once we get her hovering.

What about running the tail motor ESC in heli gov mode?

CrayonBox · 11-16-2011, 06:15 AM

Quote:

Originally Posted by brtmac

What about running the tail motor ESC in heli gov mode?

+1

cbergen · 11-16-2011, 09:36 AM

As with all governors, it only REACTS to an RPM change.

The tail rotor RPM drops when a load is placed on it, ie a hard pitch change. At this point, it's too late to try to add more power, the reduction in RPM has already caused a degradation in tail rotor effectiveness.

By adding in a mix, increasing the power when, if not slightly ahead of, it's required, the tail never slows down.

Same reason I don't run a governor on my Gasser. My cyclic to throttle mix does a better job of maintaining RPM under a load than a governor does, as does a careful setup with pitch and throttle curves. Yes, it takes longer, takes numerous flight tests to get it set right, but in the end it works better for me.

11-07-2011, 11:42 AM	#62 (permalink)
tott Registered Users Join Date: Dec 2008	.................................................. ..

11-08-2011, 07:27 AM	#63 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	Sorry guys, forgot the family was taking me out for a birthday dinner last night.... Will get the videos up today. __________________ Chris D. Bergen Bergen R/C Helicopters

11-08-2011, 11:34 AM	#65 (permalink)
tott Registered Users Join Date: Dec 2008	.. YES.....Happy Birthday.....CHRIS Did you get a shinny new Bergen helicopter for your birthday ???? I know that is what most of us fellow FREAKERS would want.......lol JASON

11-08-2011, 05:37 PM	#66 (permalink)
heli-trex Registered Users Join Date: Dec 2009	Happy Birthday Chris:ch eers

11-12-2011, 06:04 AM	#67 (permalink)
aaron07 Registered Users My HF Map location Join Date: Feb 2007	So birthdays do take at least a week to celebrate. I am excited to see this footage 8-) I want to add this to my E-Observer. When can we order this mod for our E-Observers? __________________ 8S Trex 500 3026-1000KV, Jazz 55 10 32, Sportbec, 3 9650mg's, Vistabi V Bar V4 / JR8900. 8S Trex 600esp 4025-890KV, Jazz 55 10 32 with heatsink, Herc HC/HV bec, 3 JR8915's, Vistabi V Bar V4 / JR8900.

11-07-2011, 07:56 AM	#61 (permalink)
sunnyville Registered Users Join Date: May 2011	finally yes! Gonna make popcorn and enjoy!

11-08-2011, 07:35 AM	#64 (permalink)
sunnyville Registered Users Join Date: May 2011	In that case, happy birthday!

11-14-2011, 08:15 AM	#68 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	Pics of the wiring, should have the video of running it up uploaded shortly. It has been a BUSY couple of weeks... Attached Thumbnails __________________ Chris D. Bergen Bergen R/C Helicopters

11-14-2011, 09:09 AM	#69 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	Video up!! [ame]http://www.youtube.com/watch?v=l6_5q9dcWmc[/ame] __________________ Chris D. Bergen Bergen R/C Helicopters

11-14-2011, 11:21 AM	#70 (permalink)
nightflyr Registered Users My HF Map location Join Date: Jan 2009 Location: Long Island, NY	Nice work Chris That tail is a bit scary __________________ MSR x1 / mCPX x2 / 450 x4 / Chaos600 test bed / Chaos600 Air-Wolf / American WereWolf 800 / KFrame800/900/1000 / Assorted Fixed Wing JR9303 / JR9503 / Futaba10CHP

11-14-2011, 11:29 AM	#71 (permalink)
sunnyville Registered Users Join Date: May 2011	God that tail went for you! Nice way to test if the gyro works! Can't wait to see videos of this in the air. I am guessing that is not too far off, considering the stage of the build in that video?

11-14-2011, 01:43 PM	#72 (permalink)
s_linste Registered Users Join Date: Jan 2011	How does the RPM on the tail vary? Do you set it manually?

11-14-2011, 03:23 PM	#74 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	Exactly correct. The RPM is fixed for the most part. I did learn from testing on another bird that a mix is needed to add RPM with hard pitch changes such as a fast collective climbout or putting in a hard pirouette against main rotor torque. That mix will be sorted out once we get her hovering. For this initial test, I intended for the pitch to be zero or centered, but apparently I moved it inadvertently, causing it to try to get me. I'm just glad I didn't scream like I did at Paranormal Activity 3... __________________ Chris D. Bergen Bergen R/C Helicopters

11-15-2011, 12:16 AM	#76 (permalink)
tott Registered Users Join Date: Dec 2008	...... Looks good Chris....Thanks for posting the update / video..... JASON

11-15-2011, 03:44 PM	#77 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	Internet went down right after I posted that vid, been working off of my MIFI from Verizon... This sucks... __________________ Chris D. Bergen Bergen R/C Helicopters

11-16-2011, 09:36 AM	#80 (permalink)
cbergen Registered Users Thread Starter My HF Map location Join Date: Apr 2004	As with all governors, it only REACTS to an RPM change. The tail rotor RPM drops when a load is placed on it, ie a hard pitch change. At this point, it's too late to try to add more power, the reduction in RPM has already caused a degradation in tail rotor effectiveness. By adding in a mix, increasing the power when, if not slightly ahead of, it's required, the tail never slows down. Same reason I don't run a governor on my Gasser. My cyclic to throttle mix does a better job of maintaining RPM under a load than a governor does, as does a careful setup with pitch and throttle curves. Yes, it takes longer, takes numerous flight tests to get it set right, but in the end it works better for me. __________________ Chris D. Bergen Bergen R/C Helicopters

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