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Thunder Power RC ProModeler
Mojave

Elite Veteran

Palos Verdes, Ca. USA

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I made a mount for the Demon unit that ties into the anti rotation bracket. Simple, effective and easy to access.

I'm scratching my head on one detail: The mechs/head have a forward tilt and the demon unit is mounted square to the main shaft (on the same angle). So I'm thinking that I should bend the bracket to be parallel to the heli floor. That way when the unit initializes it will see the airframe as level, regardless of the main shaft tilt. Any opinions on this?
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-16-2016 03:43 AM
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Thumper217

Senior Heliman

Slidell, LA - USA

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Barry,

Lot of good stuff in this thread thanks for taking the time to share.

I would think that you would want the demon to line up with the angle of the main shaft so that when you are in a hover it's not fighting to keep it level. But I guess it depends on what it does at initialization. I'm going to show my ignorance here on just how these things work and am welcoming someone to school me on my errors or misconceptions...

If when it initializes it sets whatever position it is in as being level then I guess you should position the bracket so that the unit lines up with the fuselage as you want it to sit in a hover. But if level is level no matter what position it is in when it initializes than I think it should be lined up with the main shaft. I use Skookum so I'm not familiar with the demon but I am assuming that the general principles are the same.

Looking forward to others responses to this...

Thanks,
Andrew

Thumper

08-16-2016 03:56 AM
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sean911sc

Veteran

SoCal

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Same boat here. Level with fuse floor. I previously had the HD Rigid installed and used the Auto-Level (momentary switch) all the time to adjust trim as needed. Hover is nose up and drops in forward flight which brings it closer to BD initialization state. My mechanics are in Pod/boom for testing BD. I'm still learning the 3SX an flights in P/B are mostly in Rigid. It would be nice to compare some out BD setup files to see how close /far my settings are.

Sean

08-16-2016 04:37 AM
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coptercptn

Elite Veteran

Mesa AZ. USA

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I have the demon mounted in the forward fuse.. With 3 degree forward rake on the rotor head ..all seems to be happy that way...

Home of the "Sea Cobra".....

08-16-2016 04:45 AM
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Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Barry, i would keep it level it level with the mechanics. with the tilt in the fuselage, the mechanics will still hover level even though the fuse may not. the mechanics doesn't know or care what the fuselage is doing, it will still assume its natural "poise" when airborne

drive a rotary, fly a rotorcraft

08-16-2016 11:48 AM
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doorman

rrProfessor

Sherwood, Arkansas

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Level With Mechanics

I agree with Jim and Emile.. I have always set my sensor so it was level with the mechanics..

AMA 2918-Team JR, Spin Blades, East Coast Scale Helicopter,Castle Creations

08-16-2016 03:06 PM
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Mojave

Elite Veteran

Palos Verdes, Ca. USA

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Interesting input, thanks guys. I think I'll try it just the way it is and see how it hovers/flies. I just wasn't sure if the initialization set the parameter of level and the unit wouldn't adjust when in flight, or would fight me trying to maintain level flight.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-17-2016 02:06 AM
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coptercptn

Elite Veteran

Mesa AZ. USA

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I was told that the small difference in the rake angle doesn't effect it ... And it doesn't appear to ( on my 53 at least)

Home of the "Sea Cobra".....

08-17-2016 03:12 AM
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goodhunting

Senior Heliman

Slovenia ... somewhere in Europe

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Barry

You machined your mount from aluminium. Do you think if this mount were from any other material (let's say carbon fibre) would it be more probe to vibrations?

gh

08-17-2016 06:54 AM
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Mojave

Elite Veteran

Palos Verdes, Ca. USA

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Hey Jim, yeah that's what I'm hearing too. I had a little sidebar with Joel and he seems to concur with you that it will fly fine. I told him I'd keep him posted.

GH: I used .090" thick T6 aluminum, which has worked fine for me in the past. I'm a big fan of carbon fiber sheet stock, as it's very strong and rigid, but more expensive. I would think that you could use a similar thickness of CF and it would be fine.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-18-2016 04:23 AM
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tonysrepair

Veteran

portland oregon

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bringing this beauty to scale masters barry?

08-18-2016 06:15 AM
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goodhunting

Senior Heliman

Slovenia ... somewhere in Europe

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Barry

thanks. I'm using your idea in my build with CF plate...
Love this forum

gh

08-18-2016 06:33 AM
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Mojave

Elite Veteran

Palos Verdes, Ca. USA

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GH: Cool, let me know how it turns out.

Tony: Yeah, I'm bringing it to HSM. But I wouldn't call it a beauty on it's best day. The paint job's "rattle can gone wrong"...LOL Kinda like putting lipstick on a pig...
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-19-2016 04:38 AM
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cobieg

Heliman

Florida

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"Kinda like putting lipstick on a pig..."
But when it is all said and done, it is still a pig.

Ron

I didn't crash. I just ran out of airspeed, altitude, and ideas all at the same time!

08-19-2016 10:57 PM
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Mojave

Elite Veteran

Palos Verdes, Ca. USA

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LOL, yup... Here's the latest: The servos are all mounted and the head is on. I need to hook it all up, level the swash, set the pitch and dial in the Demon unit. I'm setting it up with 5 degrees pos pitch at center stick and we'll go from there. I set it up with 3 servo 90 degrees. I was going to do 3/120, but changed my mind. I also moved the servos around a bit to improve the geometry.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-20-2016 01:47 AM
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cobieg

Heliman

Florida

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Hey Barry, that looks amazing. I know that the head is running ccw, it would be nice if the link ball could attach on the other side so the blade bolts could drop in from the top.
Can't wait to see it fly.

Ron

I didn't crash. I just ran out of airspeed, altitude, and ideas all at the same time!

08-20-2016 02:38 AM
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darrelluh1b

Senior Heliman

Dalton Ga

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Barry
Why 3-90 vs 3-120
Darrell

08-20-2016 02:59 AM
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Mojave

Elite Veteran

Palos Verdes, Ca. USA

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Hey Ron, agreed. I could do that and re-phase the head, but then I'd have trailing edge control on the grips. I prefer leading edge control.

Hi Darrell, I chose 90 degree because the Xtreme mechs were designed for 90 degree and it's easier. They are so wide that it's difficult to get the correct geometry for 3/120 with the servo ball locations on the vario swash. If I felt like changing the swash, or using extended balls on the swash, I could do it. So, I'm just setting up the demon unit for 4/90 and eliminating one servo from the mix. I've done this with Vbar before and it works fine. The unit just sends a signal to the empty port.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

08-20-2016 03:49 AM
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Copter Doctor

rrProfessor

Enterprise/ft.rucker ,al- home of army aviation

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Mr V-bar using the demon? this demon must be the poop!

drive a rotary, fly a rotorcraft

08-20-2016 04:38 AM
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goodhunting

Senior Heliman

Slovenia ... somewhere in Europe

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Barry

So why don't you set up the fourth servo as well?

Klem

08-20-2016 06:37 AM
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