TRex 600 Short Mainshaft *New*

[serpent887]

Align have released a new mainshaft for FBL use on the 600N/E: 10mm shorter than the FB version

Align HN6118

[Eckchaz]

Woo Hoo.. another purchase!! I've always liked a lower head!

[tonystevens]

watch those boom strikes

[Eckchaz]

watch those boom strikes

Boooooooo....

[Gaza07]

Is there a reason for this

[rceccleston]

Is there a reason for this

Yes, the weight is closer to the c of g.

[rceccleston]

Align have released a new mainshaft for FBL use on the 600N/E: 10mm shorter than the FB version

Align HN6118

I haven't seen any 10mm shorter flybarless link rod that can be used with this new shaft.

[Paulice]

and how much pitch will be lost?

[tonystevens]

and how much pitch will be lost?

Very good point,i know nothing about flybarless set up but i suppose

With not having a washout i suppose you dont need as long a shaft?

[rceccleston]

and how much pitch will be lost?

None..

You would have to replace the existing link rods with ones that are 10mm short to compliment the main shaft.

[Paulice]

None..

You would have to replace the existing link rods with ones that are 10mm short to compliment the main shaft.

You would loose some pitch.
I have the RJX head on my 500 and it has 3 mounting holes.
also giving about 10mm of adjustment.
If i use the lowest hole on the head, the available travel of the swashplate is 10mm more than using the highest hole on the head.

Limiting the swashplate travel will limit the pitch range, so removing 10mm from the main shaft you will need links 5 mm shorter (Not 10mm) so to keep the swashplate in the middle of it available travel.

But there will be some pitch lost, and that would depend on the head geometry each head would be different.

[barney]

and how much pitch will be lost?

Its a case of the Lost...and found..

First you have to be aware that the fundamental difference between the 550 and 600 versions in that the 550 uses direct to Swash servos. The 600 series all use a counter shaft that doubles the servo to Swash travel hence the long mainshaft. The 550 already uses a shorter Mainshaft although it doesn't use a 3rd Mainshaft Bearing.

See my thread about Trex 600N to 550e Hybrid explaining the differences to achieve the required Pitch Range.


http://www.rcheliaddict.co.uk/t-rex-...50-600e-3.html

See Post 27. The upper Mixer options which increase available cyclic/collective Pitch.

Note also See Post No 42 The 550 Washout is shallower to allow enough movement on the short mainshaft so you will likely require this or modify as I did..

Hope that answers your questions guys

Brian.

[Eckchaz]

Its a case of the Lost...and found..

First you have to be aware that the fundamental difference between the 550 and 600 versions in that the 550 uses direct to Swash servos. The 600 series all use a counter shaft that doubles the servo to Swash travel hence the long mainshaft. The 550 already uses a shorter Mainshaft although it doesn't use a 3rd Mainshaft Bearing.

See my thread about Trex 600N to 550e Hybrid explaining the differences to achieve the required Pitch Range.


http://www.rcheliaddict.co.uk/t-rex-...50-600e-3.html

See Post 27. The upper Mixer options which increase available cyclic/collective Pitch.

Note also See Post No 42 The 550 Washout is shallower to allow enough movement on the short mainshaft so you will likely require this or modify as I did..

Hope that answers your questions guys

Brian.

Thanks Brian.. your "Hybrid" Thread is one od the most informative and interesting reads i've come across !

Just a quick one though.. dispite it being a shorter shaft.. do we really lose pitch condidering how the mixing base can be positioned on FBL?!

[rceccleston]

You would loose some pitch.
I have the RJX head on my 500 and it has 3 mounting holes.
also giving about 10mm of adjustment.
If i use the lowest hole on the head, the available travel of the swashplate is 10mm more than using the highest hole on the head.

Limiting the swashplate travel will limit the pitch range, so removing 10mm from the main shaft you will need links 5 mm shorter (Not 10mm) so to keep the swashplate in the middle of it available travel.

But there will be some pitch lost, and that would depend on the head geometry each head would be different.

Sorry, I don't agree, this is not the case with Align flybarless head on 500, 600 and 700 heads.

The 10mm shorter shaft, with 10mm shorter link rods, will simple remove the excess shaft from above the washout base without any loss of pitch.

[barney]

This 600 short Mainshaft differs from the 550 E in that the 600 Item requires you to use a locking collar so potentially there is less travel. With FBL as mentioned the washout is fixed and can be moved up to give more room. FBarred and your going to struggle me thinks.

Brian