Rave On !!!!!!!!!!!

[mattie-lodge]

Step 5 Tail boom assembly and installation

As mentioned before, the tail is torque tube driven.



The torque tube is supported in the boom by a one way bearing and a rubber outer sleeve. I applied a smear of grease around the rubber sleeve to help it into the boom.




Once this is done you make up two ends of shaft gears and supports. This consists of two clips which hold two bearings and through the middle of them is where the angled gears are fitted. This system is identical for both ends.



They are then pushed home locating both gear ends in the slotted torque tube.



Next you fit the horizontal fin and clamp, also the tail push rod guides. With the horizontal fin clamp I had the flats filed slightly to get a better pinch on the boom.



Then you fit the assembly to the tail gearbox. This is done by pushing it home until the tail gears are meshed correctly and the anti-rotation bolt can be fitted and tightened. Following this the clamp pinch bolt is fitted which secures the boom. (Pictures below shows NO pinch bolt)





On to the front boom mounting procedure.
Two brackets are used to mount the boom to the airframe of which a separate bracket is attached to the front one that holds the transfer drive gears.





The unit is then placed into the mains frames where it picks up on the mounting holes. Once again an anti-rotation bolt and pinch bolts are used to align and clamp the boom.





This completes the boom installation. I think this has to be my favourite part of the build. Just love the way it all goes together


Couldn't help myself, so had to put the canopy on to see what it is going to look like



Very nice!!!!

[Boggy]

im enjoying this!! nice one matt

[t-rex pedro]

You could do with one or two 'bottom line' phrases in there!!

Brilliant read Mattie. Looking forward to the next episode.

[mattie-lodge]

To the final step.

Radio install and setup

Now that the build is complete it's time to fit the radio to the model. This as you are aware is a lengthily process and you have to make sure it is correct!!
.
I started by installing the three main cyclic servo’s.




These are held in by a screw into a plastic tab that is place at the back of the servo in the frame. Because of the size of this heli getting your fingers in there to hold these can be fun. So I use a small amount of medium CA and glued to the back of the frame so that the screws could pick up on them.



Next, put the tail servo in. Because I’m using a 9257 the brackets have to pick up on one of the boom clamping bolts to raise the servo up and position it correctly for the tail push rod install.





Making and connecting the links.

Cyclic servo links from the horns to the swash plate I found were all stock settings. The dimension from the centre of the servo horn to the hole required is 12.5mm. These were all set up at mid stick on the radio to give you a flat swash plate. It was then checked for correct level ness as you raise and lower the collective stick.





From the swash up consists of another four links. (Two each side.) I found the links from the upper mixing arms to the blades grips were stock settings, however I had to make changes to the longer links down to the swash plate. The manual shows them being at 48mm and the amendment sheet shows them at 44mm but I have adjusted mine to 46.1mm which works well. This gives 0 degrees pitch at mid stick and extra room top and bottom on the washout base if I require more pitch.




Tail servo link. The way I went about this was place the tail pitch slider in the middle of its travel and the set the long push rod so that the fwd end, ends up vertically above the servo output gear. Install the gyro, set to rate mode and switch the radio on. I used a 6 point Futaba servo horn (cut the extra horns off) and the second hole out which when fitted give me 95% travel limits on the gyro. (This is still un-flown)



The final Tidy up

Then came the task of tidying up the wiring and mounting the receivers and the rest of the gear. There is plenty of room under the canopy for all of this, however because I’m running a 4s setup I had to move as much of the gear rearwards to help the C of G.



All that was left was to install the rubber grommets onto the canopy and put the blades on.

Here she is

[machasm]

Looks great Matt.
Intersting to see how she will perform wih a 4S setup.
Let me know when your going down to fly her and I'll try to join you Matt.
Adrian.

[Sneeks]

That's looking great

[t-rex pedro]

Great build review Mattie. Looking forward to seeing it in action.

[mattie-lodge]

OK, Here we have three video's that I made showing the basic setups of the Scorpion ESC and the Rave helicopter linkage setups.

The first video shows the general linkage setup of the rotor head and tail rotor. Itaslo shows where I had to make the change on the longest link that is from the upper mixing arms to swash plate.

[ame]http://www.youtube.com/watch?v=U1kXrfq6pJM[/ame]

The second video shows how the initial programing of the ESC speed controller is carried out. This is basically teaching it the High and Low throttle endpoints. Note that the Infrared link is fitted here and selected to PPM mode which allows the ESC to function nornally, so this procedure would be the same if this was not fitted.

[ame]http://www.youtube.com/watch?v=qsRQI0Z5HoE[/ame]

This last video shows the way in which you can program the ESC with the Infrared remote controller and Link unit.

[ame]http://www.youtube.com/watch?v=cI1d4zHGHME[/ame]

[madgooner99]

Excellent build thread

Many thanks

Ray

[mattie-lodge]

I managed to get a flight on the Rave today. Think I may need a 14t pinon to make it come alive, however from what felt I liked it a lot. Flew very much like a 500 size nearly even a 600.

No videos as yet, but will try and get some over the weekend.

[robgt]

It's a sweet heli isn't it Matt
I see you're running yours on a 4S setup (using the -10 motor) - mine is on a 3S setup using the -6 motor...

I much prefer this heli with the 350mm blades too.

I will also try to get some vid this weekend!
Have fun!
Cheers,
Rob

[3dbasher]

i've got the servos in mine...what i've only had it 2 months

[mattie-lodge]

It's a sweet heli isn't it Matt
I see you're running yours on a 4S setup (using the -10 motor) - mine is on a 3S setup using the -6 motor...

I much prefer this heli with the 350mm blades too.

I will also try to get some vid this weekend!
Have fun!
Cheers,
Rob

How does your perform on 3s Rob? Lots of power?

PS tis a shweet heli.

[mattie-lodge]

i've got the servos in mine...what i've only had it 2 months

I wonder who will be finishing that then

[robgt]

Hi Matt,
Yes, plenty of power - I've stuck an Outrage 3S 2200 30C pack on it and it's damn good!
I much prefer the larger blades on it to the 325's.
I'm interested to hear your findings on the 4S setup though as higher voltage is always better!
Cheers,
Rob