using 2 7955's

whats the thots on maybe using 2 7955's, one for the throttle/brake as everyone seems to use it for, but also using one for steering? that would be 2 titanium geared servos with lots of torque for both applications, and being larger servos, should fit the stock holders just fine, i think.

any thots??????

well if you ask people on another forum (you know which one) they will tell you teh output shaft is to small

have to look at one again, but i thot it was 8mm

the steering servo uses a larger output shaft, but my personal opinion is if the gears are metal and it has the torque i see no reason why it shouldnt work. i mean seriously that is what teh servo saver is for and that is to protect teh servos gears.

it should fit right in there too, it does have the kinda torque we want for a steering servo. just didnt know if it was 8mm spline and could order extra alloy arm from DDM for it. it only comes with plastic, which is ok for T/Brake, but for steering, a higher torquer, im thinkin SNAP

i thought i read somewhere that hitec includes an aluminum and a plastic servo arm with it.

ddm doesnt say anything bout a alloy arm with it, just shows the plastic. so only way to know is to ask, i did a few days ago, no reply back

i would ask hitec dierctly seeign as they would know what it includes you could also look on hitecs website directly to see if one is included however if hitec follows other manufacturers trends then their website will be extremely lacking

did find one on ebay that comes with a alloy arm too.

i still think teh 7955 comes with an aluminum and a plastic arm when you buy it new, i will ask a couple of buds who use them in their helis and see what they tell me.

That's a great servo to use for the throttle/brake servo, but it's not up to the job of steering. Because it's a standard size servo, it won't be able to handle all the shock. You really need a large scale servo for steering. Smaller servos have smaller gears which means they also have smaller contact patches transferring the energy from one gear to another. This makes them more likely to strip gears when used in a high stress environment, and it doesn't get any more high stress than steering for a large scale offroad vehicle.

One of the things that surprised me about these cars was the cheep price for the better large scale servos. You should be able to find one for under $100, even if your looking for a digital one.

This is the one I use.
http://www.davesmotors.com/s.nl/c.885035/n.1/it.A/id.7071/.f
But they are out of stock right now. This is another good one, it's also digital and the torque numbers are almost identical to the one I use, but this one is just a little faster. It's also a little cheeper. I think I'm getting one of these next time I buy a steering servo.
http://www.davesmotors.com/s.nl/c.885035/n.1/it.A/id.8082/.f

Both of those come with a free DDM alloy arm, but only if you get it at DDM,

here you go, found it on tower and it DOES come with an aluminum servo arm.

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXYUM6&P=SM

so if you get it from DDM it should have not only the included aluminum arm but also an extra DDM aluminum arm

upDUHcreek wrote:

http://www.davesmotors.com/s.nl/c.885035/n.1/it.A/id.8082/.f

if memory serves me correctly (which nowadays i wonder LOL) there are 2 versions of this servo, the MG and the BB the BB has faster speed but has plastic gears teh mg has better torque and metal gears

LR
I was thinking I'd get one of those next time. It's $10 cheeper than the last steering servo I got(the first link is the one I'm using now), and it's a little faster. The torque is a little less, but it's less than 5 OZs difference. It should be good if your on a budget. I'm still running my old steering servo from my 8th scale for the throttle/brake servo on my Baja. It's seven years old, and it's analog, so I need to replace it pretty soon. I doubt ANYONE makes a servo strong and fast enough to throw the Baja's front tires around as fast as I'd like to see mine move. It's just too much weight for any servo to move like a 10th or 8th scale's steering with a high torque servo. I think the available servos do an awsome job considering they are priced under $100. Something as fast as I'd like mine to be would probablly cost $250 or $300, that's probablly why nobody makes them.

well one thing i found out, is if you got the DS extenders on front, the steering becomes crazy responsive, i couldnt keep mine under control, slightest movement was like, whoah, whoah, WHOAH!!!, so if you want faster response, try a set of DS extenders on the front.

to UDC check the servos for large scale planes there may be a servo that will suit your needs in the aircraft lineup at a good price, to LET, they were on my list till hpi contacted em today and said they would send teh parts but teh clutch was out of stock (WTH good will that do me the clutch is the biggest item of teh lot and is unuseable )

i feel your pain my friend, i really do. went through same stuff type of thing.

i am sure, all i know is i have NOT seen any quality from my hpi baja, and that i am having to replace teh majority of it with aftermarket parts (in a sense making my own baja from parts which would make it a clone LOL). anyway i now definately need to look try harder to sell my tank for funds to fix my baja, the other otpion would be to sell teh baja but this is not an option due to what i have invested in it (minus radio system) and knowing i could not get my money back on what i have spent on the baja so it is not going anywhere, i would rather let it sit on the shelf and rot but i can tell you one thing if i had it to do over again and knew then what i know now, i would go with a clone over genuine

I was planning on getting my throttle/brake servo from the local RC airplane store. Anything digital with over 200 oz/ins, and metal gears should work fine, and he's almost always got the cheepest prices in town for the same servo. He's been in business longer than anyone else in town. You probablly wouldn't like the place. His son is a fully sponsered flyer for Futaba.

lordraptor1 wrote:

i am sure, all i know is i have NOT seen any quality from my hpi baja, and that i am having to replace teh majority of it with aftermarket parts (in a sense making my own baja from parts which would make it a clone LOL). anyway i now definately need to look try harder to sell my tank for funds to fix my baja, the other otpion would be to sell teh baja but this is not an option due to what i have invested in it (minus radio system) and knowing i could not get my money back on what i have spent on the baja so it is not going anywhere, i would rather let it sit on the shelf and rot but i can tell you one thing if i had it to do over again and knew then what i know now, i would go with a clone over genuine

I've had almost no trouble at all with my Baja. I can't for the life of me figure out what's wrong that's causing you to have 10 times the amount of trouble with yours than anyone else I know. You must have some serious bad luck. You'd better stay away from that casino down there on the river.

upDUHcreek wrote:

lordraptor1 wrote:

i am sure, all i know is i have NOT seen any quality from my hpi baja, and that i am having to replace teh majority of it with aftermarket parts (in a sense making my own baja from parts which would make it a clone LOL). anyway i now definately need to look try harder to sell my tank for funds to fix my baja, the other otpion would be to sell teh baja but this is not an option due to what i have invested in it (minus radio system) and knowing i could not get my money back on what i have spent on the baja so it is not going anywhere, i would rather let it sit on the shelf and rot but i can tell you one thing if i had it to do over again and knew then what i know now, i would go with a clone over genuine

I've had almost no trouble at all with my Baja. I can't for the life of me figure out what's wrong that's causing you to have 10 times the amount of trouble with yours than anyone else I know. You must have some serious bad luck. You'd better stay away from that casino down there on the river.

i dont go to teh casino at all bud, and i to dont understand it, i am the ONLY person i know who cannot get through a half tank of fuel before something fails, i had got to the point of just filling the fuel tank half full to beat the rush LOL. hpi said they would send me the parts i need except for the clutch which is out of stock. so i am still going to be down a bit. i am hoping to find a buyer for my tank so i can use teh funds from teh sale of teh tank to fund a lauterbacher 4 shoe offroad clutch or a elecon clutch (lauterbacher 4 shoe offroad preferred) and another small part or 2

well mailbox didnt have my 401k check yet, wife thinks prolly next week, i seen DDM got the 5755's back in stck, so my entire list of goodies i want is now there, but i cant get it till that check comes in. i got the money on card, but really cant afford to spend it till i see just how much that check is for sure, thats gonna be my living money for a while. so i have to make sure i get bout what i figured i am to get before the spend on radio stuff.

im looking at under 800 for all the stuff i want to get. but i guarantee one thing, when i get that stuff, the radio and servos will be basically bulletproof for me. i dont do the high flying 20 foot in air ramp jumps, a foot or 2 is just great with me, i just run it do some fancy turns, etc... nothing like hardcore bashing, so i know mines gonna last a long time for me.

nice thing is i am gathering up spares of stuff, by upgrading things, so backups on alot of things is already accumulating up. even if i have to drop back to the original plastic parts on some alloy upgrades, i can still run the truck till i get a new part in. logical, thinkin i beleive anyways.

with that spare radio box thats comin i got for 2.75 off ebay, i can setup the radio and new servos in it using the old 3000mah battery i took out and used a DDM 4600 mah in its place. once centering and stuff like that and servo directions and throw rates and all that good stuff is dialed almost to dead on, then i can swap out the whole deal and change the batt pack over to new box. and i should be golden then. minor tweakin to finish dial in, at that point.

if and when that money arrives and im positive i have enough to afford this.

would be better if you had the funds and wanted to buy a tank

lol yah i hear ya, i hope ya find somebody to get it soon.

Lan-Ed-Tul wrote:

lol yah i hear ya, i hope ya find somebody to get it soon.