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Steering Servo Link for 1:5 Bike

Old 10-07-2003, 03:29 AM
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e_lm_70
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Default Steering Servo Link for 1:5 Bike

Hi,

Yesterday I tried out my new TT 1:5 ... very unsucesfully ... with my 1:8 HOR I'm quite good on drive it ...

I think that I don't have the right connection between the Servo and the fron Steering of the bike.

I currently use the double version (both the side) like in this picture: , but it look quite loose the connection.

I'm wondering if something more firm like this picture will help: .

I got familiar with the steering system of HOR, but this is completly different then the 1:5 TT !

I have read different opinion about how firm should be the servo connection, who say that it should be lose since the byke find its own way to go straing and turn (mine doesn't) and who say that the standard connection is too lose with not enough control...

Please help

Danke

e_lm_70
Old 10-07-2003, 11:16 AM
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BACKEMF
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Default RE: Steering Servo Link for 1:5 Bike

Kev71H, Mentioned to me that you steer opposite to what is normal, does reversing your steering servo work? try it but go gently. The thing is that if you have ever ridden a sport bike in a heavy lean and "hanging off" while you are lets say turning right the front wheel will be pointing to the left, weird but it works the 1/8th HOR does the same but you don't notice it because its pre-set up I believe...not 100% shure. I just know the concept of counter steering at speed with a motorcycle in real life. At slow cruising speeds it's normal turn right go right.
But once you add more speed and a lean (lean is necessary at speed, this is 2 wheels not 4)
the steering changes, go out and try it on a bicycle. you will see. I was actually tought that when in a full lean say... turning right, I would have to push on the right handlebar forward to keep the turn tight or in control. Once you get it you can point it anywhere, it takes practise.
No one said it was going to be easy. I just bought a FM-1e TT on Ebay from someone that did not grasp this concept. 140.00 US not bad for slightly used.
Old 10-07-2003, 12:19 PM
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Tucson01
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Default RE: Steering Servo Link for 1:5 Bike

e_lm_70 ,

The difference between yours and the modded lower picture :

Thoes yellow spacers are Servo dampners-- might be silicone tubing

You could use 2 small springs on both sides of the arm and have the same result.


Haha Ray,

You make me laugh everytime I read your post. The Kyosho HOR is a kit how could the steering be Pre-setup?
Old 10-07-2003, 06:33 PM
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Default RE: Steering Servo Link for 1:5 Bike

I should give up on any comments on the Kyosho HOR until I actually try one or have one in my little hands, sorry if there is mis-info, I just had a few looks at one and tried to size it up. Until now I have only heard somewhat negative feedback since they first came out way......back.
Old 10-08-2003, 05:29 AM
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e_lm_70
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Default RE: Steering Servo Link for 1:5 Bike

Hi,

I'm getting in the right direction with my TT Bike, my connection was way to strong ... just make more lose and more free to move ... need to be further calibrated in order to gat a right amount of steering without the instability problem ... but soon I will be able to ride it !

About the Kyosho ... I think that the steering system in Kyosho 1:8 is far better then the one in the TT/NF 1:5 (ok for NF is looking little bit better).

Not sure if the kyosho system could be used in a more heavy bike ... but I don't see any reason against it (maybe it will be more easy to brake servo, and maybe it will need high torque servos) : but my HOR can be set up in 2 seconds, it take with easy fast turn and also slow turns ... the only little spot it is that is quite slow : with the 28BB just 25km/h ... quite bad !

The Kyosho system can ride the bike letting fully free to turn the front, and just changing it's vertical position, plus the cool stuff with the change of the side weigth !

I just waiting for some little connectors and some better battery and my Brushless Kyosho HOR will be read ... should be able to fly over 50km/h ...

e_lm_70
Old 10-15-2003, 03:34 AM
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e_lm_70
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Default RE: Steering Servo Link for 1:5 Bike

Here is my new steering system.

A free Hop Ups
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Old 10-15-2003, 02:49 PM
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tjaf
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Default RE: Steering Servo Link for 1:5 Bike

If I understand well, the Kyosho uses the same steering mechanism like the graupner? With the gaupner, the battery is shifted, wich causes the bike to lean left/right, and so the turn is initiated. The front wheel itself is completely loose. It's like driving a bicycle without your hands.You take a turn by leaning left/right, and your front wheel will follow. And (once again if I understand well), with the TT the steering servo actually turns the front wheel? Is this right? I was just wondering ...
Old 10-16-2003, 03:09 AM
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e_lm_70
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Default RE: Steering Servo Link for 1:5 Bike

Hi tjaf,

No, kyosho HOR doesn't move the battery.

With the Kyosho HOR the steering servo will do two actions:
- Change the vertical position of the front wheel (the rotation is free) (like some old motorbyke prototype, like the Pomilo Tiempo RC bike)
- Change the driver position, move a little the weight inside the turn (like drive a bike without hands).

On the TT, everything is fix, no change of weight, not change of vertical position of the front !
The servo is just turning the front ... since everything is fix, the byke should have some flexibility to find the currect front wheel position on his own, so the connection between servo and wheel should be lose enoght for let the front move freely, but strong enough to get controlled by the servo (here is the reason to have springs and/or silicon).
The steering mecchanism is like in a proper bike of motorbike, in theory at very low speed is more efficient turn the front weel in the right direction for turn right ... but at medium/hight speed for turn right it is needed to turn left the front weel ... if you have just drive a bicycle, like me, you will have never notice the contersteering effect that is needed in the TT and in a real motorbyke (just look in details the front wheel of Valentino Rossi in a GP and you will notice this).
The front tyre profile of the TT, it is design in a extreme way in order to allow easily the contersteering effect.

As result:

The kyosho HOR system is the more stable and easy to drive, since the light weight of the byke the change of the vertical position of the front is also more easy.
The TT is much more heavy, so the change of the vertical position could be complicated (and easy to destroy in a crash) The TT steering system is very good for high speed turn, it will be perfect if could also add the move of some weight (like the HOR) ... maybe assisted by a gyro ... it will be the perfect byke !

e_lm_70

P.S: The TT is also solid like a rock, due to the front protection system and due to the alluminium frame ... it can take crach also at full speed without any damege ... a part some scratches on the plastic body !
Old 10-16-2003, 05:06 AM
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tjaf
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Default RE: Steering Servo Link for 1:5 Bike

Hm, thanx. It's an interesting world out there

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