Trex 450 SE and general build videos are here

[Finless]

Yep your right.... whatever percent gives zero pitch..... Some might argue for a little negative in the hopes that the lockout occurs while upright and thus you get a liitle autorotation action going... I personally dont see it but something to think about.

Bob

[NVMax]

Hey All,
This is my first post on this forum.
Bob, Thank You for all your help full vids, I thought I was set up....Guess not!

I have a gyro set up question. I have the same gear on my bird as in the vid
but my radio is an Optic6. the radio will not let me set end points for
channel 5 the gyro gain channel, but it will let me change the SUB Trim with the same end result.
Is this O.K.?

Max.

[Finless]

I cant see how sub trims will work! Its the channel end points and channel 5 tied to a switch that tells the gyro what gain to use.

However on the Optic6 you have a gyro menu! Forget about end points on channel 5 and use the gyro menu. Remember to set the gain in the gyro menu for EACH condition! e.g. normal, idel 1, hold, etc.

Bob

[NVMax]

Thanks Bob!

[snow520lee]

dear Bob,

about the blade tracking.........

If I have a blade with a red adhesive stripe and one with a blue one..... I find that the red one is higher than the blue...... which one I have to adjust? I'll make lower the red or higher the blue? There is a system to define which one is at the right level?? Sorry for this stupid question, maybe have no difference.....

Marco

[Finless]

Do not adjust both. Do one at a time. Lower the red one with ONE adjustment. If still out raise the blue one. As i said in my video dont go more than one turn on any link!

[snow520lee]

ok, so there's no a way to define which one is right.... good, so it's easier than what I was thinking!!!!!!!!!

Many thanks......

Marco

[kgfly]

I know we shouldn't shorten motor wires past where the manufacturer has pre-tinned them. What about the wires on the ESC, is it OK to cut them back by 1cm or so and then simply re-tin the ends ?

[Finless]

Yes... ESC wires are fine to cut back.

Bob

[droidit1]

Bob,

Thank you for your super informative videos! They have been a great help setting up my TREX. Do you have any tips for using the Spectrum radio or is it not "deep" tweaking wise for this heli?

Thanks,

Andy

[kgfly]

Originally Posted by droidit1

Bob,

Do you have any tips for using the Spectrum radio or is it not "deep" tweaking wise for this heli?

Andy

Hi Andy, I think you are refering to a Spektrum DX6. If so, it's great to find another adventurer willing to try the new technology :wink: I am a newbie but have done a lot of research and I think I have the radio settings sorted out for the 450XL HDE that I am building. If you are building a CDE or SE (ie ccpm) then use Bob's CCPM videos to guide you in configuring the swash settings. Note also that I have yet to build the tail so am not sure of the final rudder channel settings and also some additional tweaking will be needed once actual flight is achieved

---------------------------------------------

Spektrum DX6 Programming for TRex 450XL HDE
================================
1) Switches

* D/R = E (Aileron+Elevator dual-rate bound together on Elevator D/R switch - AFAIK not used for a heli)
* GER = A (Gyro dual-rate bound to Aileron D/R switch, used to select bewteen rate and heading-hold modes on the gyro)

2) Servo directions
* AIL, ELE = Rev
* RUD, GER, PIT, THR = Norm

3) Dual Rate (D/R)
* AI0, AI1, EL0, EL1 = 100%

4) Exponential (Exp)
* AI0, AI1, EL0, EL1 = 35%

5) Endpoints (Trv Adj)
* GER = +/- 45% (bound to Aileron D/R switch)
* Others depend on your mechanics and preferences and of course if you have a CCPM setup, should all be 100% for AIL/ELE/PIT since you use the swash features to adjust collective.

6) Throttle hold (HLD)
* -2% (tbd, should turn off power to the motor)

7) Pitch and Throttle curves

There are quite a few opinions out there on this topic. Take a look at http://www.helifreak.com/viewtopic.php?t=13519. I am planning to follow Bob's guidelines which means starting with:

Pitch - Normal: 40 50 100 (approx, aiming for -1 to -2deg low-stick)
Thrtl - Normal: 0 85 100 (equiv to 5pt: 0 43 85 93 100)

Pitch - Stunt: 0 50 100 (same as linear 5pt: 0 25 50 75 100)
Thrtl - Stunt: 100 85 100

Pitch - Hold: 0 50 100 (linear match to 5pt: 0 25 50 75 100)
Thrtl - Hold: 0 0 0

---------------------------------------------
Hope this helps,
Kenneth

[kgfly]

Originally Posted by droidit1

Bob,

Do you have any tips for using the Spectrum radio or is it not "deep" tweaking wise for this heli?

Thanks,

Andy

I also found this discussion useful: http://www.helifreak.com/viewtopic.php?t=13519

[droidit1]

Thanks man, you are a huge help! I am building a 450 SE. I ahve all the tweeky radios but want to try the new technology since it operates in a spectrum unaffecteed by noise. I appreciate your knowledge. . .I will keep you oosrted on the outcome!

Andy


quote="kgfly"]

Originally Posted by droidit1

Bob,

Do you have any tips for using the Spectrum radio or is it not "deep" tweaking wise for this heli?

Andy

Hi Andy, I think you are refering to a Spektrum DX6. If so, it's great to find another adventurer willing to try the new technology :wink: I am a newbie but have done a lot of research and I think I have the radio settings sorted out for the 450XL HDE that I am building. If you are building a CDE or SE (ie ccpm) then use Bob's CCPM videos to guide you in configuring the swash settings. Note also that I have yet to build the tail so am not sure of the final rudder channel settings and also some additional tweaking will be needed once actual flight is achieved

---------------------------------------------

Spektrum DX6 Programming for TRex 450XL HDE
================================
1) Switches

* D/R = E (Aileron+Elevator dual-rate bound together on Elevator D/R switch - AFAIK not used for a heli)
* GER = A (Gyro dual-rate bound to Aileron D/R switch, used to select bewteen rate and heading-hold modes on the gyro)

2) Servo directions
* AIL, ELE = Rev
* RUD, GER, PIT, THR = Norm

3) Dual Rate (D/R)
* AI0, AI1, EL0, EL1 = 100%

4) Exponential (Exp)
* AI0, AI1, EL0, EL1 = 35%

5) Endpoints (Trv Adj)
* GER = +/- 45% (bound to Aileron D/R switch)
* Others depend on your mechanics and preferences and of course if you have a CCPM setup, should all be 100% for AIL/ELE/PIT since you use the swash features to adjust collective.

6) Throttle hold (HLD)
* -2% (tbd, should turn off power to the motor)

7) Pitch and Throttle curves

There are quite a few opinions out there on this topic. Take a look at http://www.helifreak.com/viewtopic.php?t=13519. I am planning to follow Bob's guidelines which means starting with:

Pitch - Normal: 40 50 100 (approx, aiming for -1 to -2deg low-stick)
Thrtl - Normal: 0 85 100 (equiv to 5pt: 0 43 85 93 100)

Pitch - Stunt: 0 50 100 (same as linear 5pt: 0 25 50 75 100)
Thrtl - Stunt: 100 85 100

Pitch - Hold: 0 50 100 (linear match to 5pt: 0 25 50 75 100)
Thrtl - Hold: 0 0 0

---------------------------------------------
Hope this helps,
Kenneth[/quote]

[kgfly]

Hi Bob,

I want to put together some training gear from 3mm CF rod and practice golf balls.

1) How long should each rod be (ie approx radial distance from centre to the ball ?

At the moment I have 2 x 500mm rods which will give approx a 250mm radius, quite a bit less than say the rotor radius of about 360mm.

2) Should the rods be mounted beneath the skids such that the heli rests up in the air on the training gear, or on top of the skids such that the heli rests on the skids ?

Thanks,
Kenneth

[Finless]

ALso see this guide for the DX6

http://www.digimemphoto.com/guides/backguide.htm

Bob

[Finless]

Just added 2 new videos:
Installing the NEW improved SE tail hub
And I hate to say this but I had to modify the new hub to make it work better. So a quicky video on how to modify it to remove end play.

Bob

[Naruto28]

Bob, thank you for taking the time and effort to put together all of these videos. I just finished building my first Trex (a CDE) and got it nice and dialed in today. It flies great! I'm fairly decent with putting stuff together, but I honestly think my bird would be a complete mess with only the crappy manual and lack of experience to guide me on my end. Your videos were a huge help and I've learned a ton this past week. It's people like you that make this hobby even more enjoyable and easier for noobs like myself to get started in. Thanks again!

[CaptEv0]

Bob,
You had mention about the oneway bearing remover in the video.
What's the part number for it?
I watched your video and was using the socket.
Like an idiot, I picked the socket that was alittle too tight, enought to where the bearing got in there and I couldn't get it back out of the socket
Thanks

[GimbalFan]

It's p# K10273A

[WillJames]

Not to hijack this thread, but I own the Align auto bearing removal tool...

This tool that Rotorworkz.com Charley makes is MUCH MUCH MUCH MUCH better and all you need is two hands to use it. http://www.helifreak.com/about11123.html Probably 50 people have used mine and now Wayne Ellison has it and shares it at all the events. Charley's tool is GREAT!!