ally servo saver

[v8davep]

Hi All, just fitted a s/h ally servo saver to my Stadium jeep, I used three 'o' rings on the servo saver, thought i would give it a quick test up the street... bad move, clobbered a kerb at a reasonable rate a stripped the gears in the servo (futaba S3306).
Not amused, spent about 2 hours making plates so I could fit a spare hitec 755mg and its a slow as hell with no torque! so I ordered a new s3306Mg and some gears to fix my s3306.

I have hit a kerb before with the old plastic saver and been ok, guess I was unlucky, my question is how many 'o' rings should be fitted to the ally saver?

thanks

 

[Trebor]

that all depends on how thick you have the "O" rings

K....

 

[atom3624]

that all depends on how thick you have the "O" rings

K....

+1 on that, plus how good the servo is.
I have 4 thick - 4mm O-rings on my FG MT - but I'm using twin Rhinos and MCD chevron tyres.

Smaller tyres, and certainly with a weaker servo, you're better not having many, to save the servo. 'Tune it in' to find your compromise.

Al.

 

[v8davep]

The servo is an S3306 rated at 25Kg I was running three of the standard FG 'o' rings that come with the alloy saver...

I guess real answer is don't hit the kerb! the steering was really positive prior to the crash.

 

[atom3624]

Here's another thing.
I've 'got the t-shirt' on the alloy servo saver, as many of us have here.

How's the servo saver spring?
After a few 'thumps' it deforms - it can be straightened out, but you need to remove and dismantle it. That can also give you sloppy steering.
Al.

 

[Mike1970]

The Alloy servo saver with the O rings were brilliant on my old leopard. When I was running 2 of the old kingcobra/hitec servos or the tonegowa I still run. I never had any issues or breakages and that was with a spur gear cush drive rubber on it instead of the O rings.

There is a lot to be said for getting decent servos that will not only do the job asked of them, but they will also take the abuse when things go pete tong.

 

[v8davep]

Had a look at the servo saver spring yesterday and it looks fine, no play in the unit at all.. not running with 2 FG 'o' rings

The hitec servo is rubbish though, steering is vague and slow, hard to correct the slides, I could drift it on dusty tarmac with the old servo, so now just waiting for the new one I ordered....

Took the truck out for a run yesterday and its running great, I am using my CY 23 bitza engine its got a cheap rovan ebay top end for 29cc, I matched the base gasket (copper) to the transfer ports / shimming correctly and I can't believe how much power it has!!

Not sure how long it will last as the plating did not look good quality, but hey its really cheap mod to do, so I thought it was worth try, so its 3 tanks in at the moment. I am running it on Shell 98 ron V power with fully synth oil at 33-1 mix

 

[atom3624]

'Most' people default to:
1. Multiplex Digi-4 Rhino (6V).
2. Hitec 5755.
3. Tonegawa - monster torque (and size!!). PS-050 (http://www.tokyo-hobbies.com/tonegawa.html)

Multiplex have replaced the 'old 6V Rhino' with a newer LiPo compatible Rhino - similar torque, but at 7.4V, not 6V.

I'm running twin Rhinos on my FG MT and a single Rhino on my 1/5.
So far, they've taken a few knocks but are running fine.
Had to replace the gear set in one, after 'one knock too many' in the MT!!

Al.

 

[Mike1970]

The Rhinos are great and after some recent testing by a mate of mine - it would appear that the newer ones are better for the extra money.

99% of cheaper/not fit for task servos just lead to problems.

 

[v8davep]

I have ordered a Futaba S3306 MG 25kg at .14sec transit time, the servo I took out was the plastic geared version of this one and was working very well until I stripped the gears! So I though I would try the MG version as they are not that expensive.

I Have a Hitec 805MG in my FG F1 car and that seem good too...

I will let you know how it goes.