Velos 880 and SK720BE

[A VIKING]

With the 880 being a twin motor design and with the SK720BE having one throttle port I assume the two ESC throttle wires are connected by "Y" cord to the single FBL port.
Correct?
I don't see anything in the 880 manual addressing this.

Update: The use of the "Y" lead is in the manual.

[dcope17]

I remember reading through the Velos 880 thread and that question was raised because someone thought that the motors would fight each other if you couldn't adjust one ESC verses the other.
I remember the response being something like this...
The ESCs will be matched close enough because both will be getting the same pulse width. So a Y cable is the way to do it.

[georgi UK]

=] And, the packs have identical drain!.....

[A VIKING]

Originally Posted by georgi UK

=] And, the packs have identical drain!.....

Pack drain didn't even cross my mind.
This should be interesting.
Thanks and anything else particular to the Velos 880 and Skookum please bring it forward.

[A VIKING]

I believe I understand.
One HW sensor hooked up to one motor and feeding the SK speed information.
The SK by "Y" harness hooked up to both ESC's to control motor speed.

[Luvmyhelis]

Originally Posted by A VIKING

I believe I understand.
One HW sensor hooked up to one motor and feeding the SK speed information.
The SK by "Y" harness hooked up to both ESC's to control motor speed.

They did their original testing with a Skookum in place, I directly asked if this was due to the four servo layout, but never got an answer that made sense. I also asked about the reason being due to the vibe logging ability and they got mad at me thinking I was inferring they needed that? Bottom line, YGE already links two esc's together via a common input for their 320hv. Nothing but a Y. Skookum already works with the Velos system. Congrats! A truly impressive heli!

[Xrayted]

Originally Posted by Luvmyhelis

They did their original testing with a Skookum in place, I directly asked if this was due to the four servo layout, but never got an answer that made sense. I also asked about the reason being due to the vibe logging ability and they got mad at me thinking I was inferring they needed that? Bottom line, YGE already links two esc's together via a common input for their 320hv. Nothing but a Y. Skookum already works with the Velos system. Congrats! A truly impressive heli!

It was stated that they used the SK because it was one of the few FBL units that offered a 4 servo layout option and governor mode, which is required to fly this heli due to it having individual one way bearings on each motor so that there will be no conflict if one motor were to be slightly out of step with a different rpm than the other.

The governing must come from the FBL unit since you can't have two different ESCs trying to control it simultaneously, and it uses a 4 swash servo setup, so the SK unit fit the bill perfectly.

[Luvmyhelis]

Much as I assumed. Thanks for the clarification! No matter what, this is an 800 class heli that will for a long long time be the bad boy of this class. After watching the vids of it being hammered, I can without resolution say none of my 8s perform anywhere close. And I arguably have the most powerful systems on mine to date out there. This heli is a beast! I can't imagine the presence of something that large and fast, and utterly dangerous. The crash costs have to be truly daunting alone.

[Xrayted]

Yes its a beast! I would love to have one just for hell of it and the build, but its just too big to transport around at this point. My 700 barely fits in my car now.

It will be interesting to see how many of these show up quickly in the classifieds once a few owners dirt nap them once or twice and reality sets in.

Its like owning exotic cars.......they are awesome for a little while until the new wears off and all your friends have already seen it, but then the cost of ownership and maintenance still keeps coming, and the fun level drops considerably

[georgi UK]

=] what's interesting for me, is the concept! Like if this were to be applied to the smaller end of the scale............

[A VIKING]

Originally Posted by georgi UK

=] what's interesting for me, is the concept! Like if this were to be applied to the smaller end of the scale............

Yes it does open up many possibilities.
Just because it was created first in the 800 class doesn't mean the concept wouldn't translate well into the smaller scale ships.
It would actually be super fun and less of a blow to the wallet.
I like what your thinking about.

[Luvmyhelis]

Prob is most smaller ships have all the motor they can handle per blade size already. The dual motor setup was crucial to reach past the 800 barrier, as the esc and can size simply don't exist to get the torque those massive blades need. I already designed a dual battery dual motor setup years back for the 7/800 class for a coaxial concept. Odd, it is in some ways so much like the Velos! But on this each motor runs its own counter rotating shaft. With tri rotors and cp swash.

[A VIKING]

You are absolutely right LMH.
But its still alluring to have excessive power and the mechanical design that creates it.
I have always been drawn to admire designs that create excessive power, even when that power is not needed, the fact it exists, and can be used, is awesome.
I am in awe of anyone who can put their imagination to work in creating something more powerful or aerodynamic than what had existed before.
I say bring it on.
Do I need it...nope...but its awesome to see.
Power...you can never have two much and if you do, you just need to know where the limits are.
Two of my favorite visuals that show nearly unmanageable power...when you see a super bike frame twist and unwind as the rider negotiates a corner backing off on the throttle and then rolling that power back on and the twisting contortions of a dragster frame at the moment the hammer is dropped. Pure awesomeness.

[A VIKING]

The Velos 880 manual does mention to use a "Y" lead to connect both ESCs to the FBL.
I guess I was into looking at pictures instead of reading instructions.
The Velos manual like other publications I can't mention, I'd rather look at the pictures than read the articles.

[Luvmyhelis]

Originally Posted by A VIKING

The Velos 880 manual does mention to use a "Y" lead to connect both ESCs to the FBL.
I guess I was into looking at pictures instead of reading instructions.
The Velos manual like other publications I can't mention, I'd rather look at the pictures than read the articles.

That's what happens with heli porn.

[OnTheSnap]

Originally Posted by Luvmyhelis

They did their original testing with a Skookum in place, I directly asked if this was due to the four servo layout, but never got an answer that made sense. I also asked about the reason being due to the vibe logging ability and they got mad at me thinking I was inferring they needed that? Bottom line, YGE already links two esc's together via a common input for their 320hv. Nothing but a Y. Skookum already works with the Velos system. Congrats! A truly impressive heli!

Who did you ask? I don't understand how they could mess up such a simple question? Yes it has a 4 servo swash and needs a controller capable of 90 eCCPM. I flew all my early test flights on a sk720be with gps. And the designer flys with it as well. Yes I've used the logging to analyze the model.

For gov actually we think it's possible to effectively use the ESC gov's since its a very forgiving drive system. The load acts like a dampener and both ESCs can be a little asynchronous. But I always have used the Fbl gov which connects to both ESC as a y lead. You sense rpm from just one mtor.

I later switched to vbarcontrol which also works great with the Velos.