RunRyder - Blade Servos

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e-E-Flite Blade CP CX 400-3D > Blade Servos

k0tbt
Senior Heliman
Location: Eagan, MN

I was reading that the Hitec 55 servos fit into the Blade perfectly, but the one in the left rear position won't work because is has to work "backwards" and won't. Pity, I was planning to build up a Blade with individual components and I was considering different servos than those stock one. I might have to reconsider that part of the idea.

Has anyone tried this? Has anyone any experience with the servos. What makes the Eflite servos work while Hitec's won't. Can a servo be reversed? Perhaps some magic is being performed in the 4-in-1.

Karl

07-28-2005 Over year old.

k0tbt
Senior Heliman
Location: Eagan, MN

You know, in thinking about this, isn't this something that is accomplished by the servo reversing program in the transmitter?

07-28-2005 Over year old.

Error401
Heliman
Location: Roanoke, VA

Seems to me that the roll servos should both work in the same direction. With (say) aileron input to the right, both rear servos should rotate clockwise (looking aft), with the horns on either side of the servos, the right servo arm should drop, while the left one should rise. The Hi-tech servos should do the same, if not reverse the aileron on the Tx. I don't see why they would operate in the opposite direction and act like collective.

07-28-2005 Over year old.

HOMEPAGE

Jason Merkle
Senior Heliman
Location: Champaign, IL

Karl -

55 servos will work fine in a BCP as long as you use the different transmitter than stock (even if using the stock 4-in-1). The stock transmitter is programmed for the EFL servos which do operate in reverse standard from what 55s do.

55 servos will not work in a BCP with the stock TX.

07-28-2005 Over year old.

Error401
Heliman
Location: Roanoke, VA

That's just messed up. I hate propriatary BS like that.

07-29-2005 Over year old.

HOMEPAGE

k0tbt
Senior Heliman
Location: Eagan, MN

That's what I figured. You know it would be amazing if I would stop and think things through before I waste bandwidth here. LOL

Karl

07-29-2005 Over year old.

SkidBreaker
Heliman
Location: Asheville, NC

lol error401.....

Fly it like you stole it, or at least have a lot of spare parts....

07-30-2005 Over year old.

HOMEPAGE

Hoverup
Elite Veteran
Location: Gulf Coast

Yes there are. On the front panel.

Cheers - Boyd
AMA80393
Major USAF
Retired

07-31-2005 Over year old.

k0tbt
Senior Heliman
Location: Eagan, MN

I Found Out It's True??

OK people,

I got a Blade basic airframe, and am installing individual components. I'm trying the Hitec 55's since I had some laying around. I temporarily installed them, and set up my transmitter for 120 degree swashplate. My transmitter is a JR6102, by the way. I can't find a combination of servo reversing to get all three servos to act right in all three modes (left/right, forward/backward, up/down). I can 2 out of 3 modes to work, but not all three.

I'm using the JR700 receiver and I've got the servos connected as follows:
Front servo - Elevator
Left Rear servo - Aux 1/Pitch
Right Rear servo - Aileron

Switch the two rear servos into the receiver? Chant some incantation?

Thanks in advance.

Karl

08-01-2005 Over year old.

Jason Merkle
Senior Heliman
Location: Champaign, IL

Hello Karl,

Unfortunately I dont own a 6102 Tx, but with my other JR Txs (8103, 9303) I use the CCPM swash travels to adjust the direction of operation. This is typically found on a screen that allows you to adjust the AIL, ELE and PIT travel values and using a NEGATIVE value will reverse the operation of that particular function without affecting the others.

Lots of times people dont realize they can use a negative value and assume only positive values are available.

BTW - I just found the screen Im talking about on page 68 of the 6102 manual. Give that a shot and Im sure youll be able to get it working right. I know Ron Osinski and a few other Team JR pilots are using the 6102 radios with their BCPs using the stock servos with no problems.

08-01-2005 Over year old.

Squirrlybird
Veteran
Location: Suffolk, Va US

Just reversing the servo will not work because of the type of swashplate and mixing on the blade. In order to reverse on this type of swash, the entire function must be reversed (i.e. negative value for a specific function). You will find that if you reverse a channel, other functions will not work properly because on this type of system, each servo on the swash uses more than one channel and each function uses more than one servo.

If you raise the collective, all 3 servos move down to increase blade pitch.

Pitch forward and you have servos in the back that want to move up and a forward servo that wants to move down.

Combine these 2 functions and you get an altogether response and adding the difficulty.

So I guess the answer is to get a new transmitter which you can adjust the mixing functions. The Futaba 7chp manual explains a setup for the kyosho Caliber which is exactly like the blade.

08-01-2005 Over year old.

k0tbt
Senior Heliman
Location: Eagan, MN

BINGO!

All Right!!! After trying various combinations, I found the one with reversing AND positive/negative values that give the proper servo movement for all three axis of movement. I'm still not home yet for after I get the components installed, I'll still have to play with subtrims, ATVs, etc. This is all part of the fun of helis -- try, succeed, try, fail, get confused, ask questions, get answers, try, fail, try succeed. Sometimes the learning is as much fun as flying.

Thanks to Jason and all others for their input on this stumper.

Karl

08-02-2005 Over year old.

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e-E-Flite Blade CP CX 400-3D > Blade Servos

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