Bortzilla

iTrader: (26)

I'm trying to decide on a new throttle/brake servo for my 8th scale nitro buggy and I have it narrowed down to these 2 options. Does anyone have experience with both? I know that the HSB-9380 is fairly new.

Specs @ 7.4v
7950
Power: 486 oz.
Speed: .13 sec.
Street Price: $149.99

9380
Power: 472 oz.
Speed: .14 sec.
Street Price: $179.99

According to the specs, the 7950 has better power, speed and price, so I'm leaning that way. I think the main benefit of the 9380 is its efficiency. Is there anything else I should be weighing into my decision?

Thanks for any feedback you can provide.

Salkin

Are those servos not on the slow side for a throttle/brake servo?

Jerm13

iTrader: (36)

Agree. Maybe a little faster would be the way to go. You don't need 400+oz/in of torque on a throttle servo. 200 would be plenty. Now this is all dependent on if you have your linkages set up correctly and your components are not worn out. Make sure you are not fixing a problem without really fixing the problem. But too fast can be a little hard to control. I like really fast, .05 seconds, while my son prefers a little slower at .09 seconds. The slower servos help to smooth out power application. But too slow and it feels lazy to me.

But to your question....

The main difference between the 2 is the motors. The 9xxx series has a brushless and coreless motor meaning it is more efficient, faster, stronger and quieter ( wont be able to tell running nitro) the 7xxx series is just coreless

This translates to longer battery life in the end. The ones that have the " regenerative braking circuit" capabilities are great. They accually send power back to the battery which increases battery life even further.

I would look at the 9360. Fast and strong. You can always slow down a servo, but you cant make it go faster....

Orion_2kTC

iTrader: (11)

Maybe check out the 9370. Plenty of torque and faster. http://hitecrcd.com/products/servos/...-servo/product

jose valadao

What is the pad for that comes with the servos
Where do I find if I have to use it on my resever I use the futaba px4

jose valadao

Any help please

Motorman007

iTrader: (89)

I called them just now.

PAD is for electric classes He said.
Be sure to use it.


PAD is not needed in Nitro.

These are just as good
HSB-9465SH HIGH SPEED
Part: 39465
Speed (@6v): 0.09
Torque (@6v): 187 oz-in (13.5 kg-cm)
Speed (@7.4v): 0.07
Torque (@7.4v): 187 oz-in (13.5 kg-cm)
Dimensions: 1.57 x 0.78 x 1.45 in (40.0 x 20.0 x 37.0 mm)
Weight: 2.19 oz (62 g)



HSB-9475SH MULTIPURPOSE
Part: 39475
Speed (@6v): 0.13
Torque (@6v): 269 oz-in (19.4 kg-cm)
Speed (@7.4v): 0.10
Torque (@7.4v): 269 oz-in (19.4 kg-cm)
Dimensions: 1.57 x 0.78 x 1.45 in (40.0 x 20.0 x 37.0 mm)
Weight: 2.19 oz (62 g)




HSB-9485SH ULTRA TORQUE
Part: 39485
Speed (@6v): 0.18
Torque (@6v): 361 oz-in (26.0 kg-cm)
Speed (@7.4v): 0.15
Torque (@7.4v): 361 oz-in (26.0 kg-cm)
Dimensions: 1.57 x 0.78 x 1.45 in (40.0 x 20.0 x 37.0 mm)
Weight: 2.19 oz (62 g)

Steal gears and not Heat Metal case.




Titanium gears and Metal Case
HSB-93XX

MikeMayberry

The brushless servos are definitely the better choice especially for durability. The motors in these servos are so much more powerful and are regulated by the circuit to keep the current consumption and heat to a minimum. These servos will also not slow down under load so the speed stays the same right up to the point they can't move where the coreless servo can bog down at around half of their stall torque rating. Note: Team Driver Adam Drake uses the 9380 for throttle/brake in his Buggy and Truggy with the same for steering in the Truggy but uses the 9370 for steering in the Buggy. Other top level drivers use these servos as well even though they are sponsored by other brands due to their durability. The 93XX series use the exact same motor but with a more conservative circuit so there was no need for the heatsink and we also chose to go with steel gears vs. Titanium which kept the cost down. I use these in 1/10th applications although they would still be fine for 1/8th as well. In most cases, even in electric you won't need to use the PAD if you are using ESC's from Tekin, Novak, Castle as they can handle the back voltage from the regenerative braking circuit.

Mike Mayberry
Hitec USA.

Motorman007

iTrader: (89)

Thank you sir.

I'm using viper on all my stuff
1.10 2wd buggy
1.10 4wd buggy
SC410 4wd Truck
Ebuggy

So, from reading this I will I will need the PAD.

So far I love the HSB-9475SH I have 3 of them
2 in nitro and 1 in Ebuggy
Will order more once I sale the there brands.

Motorman007

iTrader: (89)

Sir have you tested the Viper ESC to see it they don't need the PAD?