qwertM3 (0 points) 1/12/2010
It is possible to be safe with this servos. My check list is: -centering, -consistence of centering, -end to end movement, -smouth movement ( no bindings in gears ), -jittering. I do it for a new servos and after the crash. Wish you all the best.
ckies (5 points) 1/1/2010
A quick confession (and warning to others perhaps) - in the servo packet you receive the servo, servo horns and three screws, a shortish one and two longer ones. Do NOT use the longer screw to secure the servo horn - it destroys the servo!!! In hind sight I realized that the longer screws are intended for mounting the servo - unfortunately a bit too late after killing 4 of these guys!
scterry (2 points) 11/30/2009
Would it be safe to run 4 of these servos on a 2A BEC? (Turnigy basic 18A ECS). I will be using 2 for the alerions, 1 for the rudder and 1 for the elevator on a 500g slow flying park flyer.I noticed the high stall currents (690mA) stated in the reviews which would exceed the 2A limit if all 4 servos were stalled. I am new to flying and am not sure if you would ever encounter this type of stall condition. Under normal flying conditions and hard reversals they draw 160mA to 290mA which would be just fine for the 2A BEC. Would I require a 3A BEC like the Hobbyking SS 25-30A ECS? Thank you for helping me choose the right ECS for these servos.
Reply:
stgram12 (2 points);
Well in my measures those servos reached stall currents of 0.5A, but if for milliseconds they go higher, you might experience some problems, especially if the ESC is very cheap. Try it like that, because there is no need for more current-rated BEC. But if there are blackouts, put one big capacitor to compensate for the burst currents.
Gunky (1 points) 10/31/2009
What are the 3 screws that come with it for? Two are the same size, one is smaller. The servo has 4 holes for mounting though.
Reply:
Andraz (16 points);
the servo has two mounting holes not 4, so the bigger screws ate for that, the smaler is to hold down the servo arm :D
This is the best servo for a good price for small models. I have 15 pieces in operation for more than one year, all work without problems.
bdoets (165 points) 10/17/2009
Wouldn't it be nice if these (or any other budget servo) would run on 7.4 V? Using a 2S lipo in a glider would be so practical.
Reply:
stgram12 (2 points);
All the servos are made for 4.8 to 6 volts, so they can be controlled by the receiver, which works on the same voltage range. And so one BEC, probably in the ESC powers everything.
maukabud (69 points) 10/10/2009
Hextronik listened to us and made the servo wires longer. I always add a pair onto my orders- the latest order (10-09) servos wires are nearly three inches longer than previous. Nice.
Reply:
stgram12 (2 points);
I'm glad that they are 8 centimeters longer now, because they were quite short(about 15cm). I would suggest even that HC adds one servo lead extender(15cm) to the servo free, so if you use it in a car, to use it like that, and if you place it in a plane, to use the additional lead if it is not enough.
Dildo (5 points) 8/22/2009
In the UK there are several of us that have had these servo's just die in the air for no reason. I know their cheap but after one repair bill you'll regret buying these servo's. There is no quality control so you don't KNOW what your going to get.
Reply:
ministeve2003 (217 points);
Strange, I've used over 100pc, and never have I had one go bad in the air... and I've torked these little things to their limit's and past...
stgram12 (2 points);
Maybe a bad batch, because really there are tons of reports for working servos... Actually i had a problem too, the servo didn't responded at all, but i got it apart few times and it worked. :)
Makseem (2 points) 8/10/2009
These are great for the esky honey bee and belt cp models. Huge improvement over stock servos. Way less slop!
Rixx (33 points) 8/5/2009
Hi. what BEC I need for 6 of this servos? Will 3A be sufficient? I plan to buy SS 25-30A speed controller... Thanks.
Reply:
stgram12 (2 points);
I suggest that 3A could do the work, but if you use all 6 servos at once with fast movements its 99% sure that the rx will restart, because these servos can draw stall currents more that 0.5A,on my measures it reached almost that current. I suggest that you put one powerful capacitor to compensate those stall currents. But if the BEC is quality made, it probably would handle more current than stated for few seconds...
stgram12 (2 points) 8/2/2009
I yesterday received my first servo, but i have a problem. After powering the rx and the ESC the servo moves a little bit and doesn't responds to any commands! I have to reset the power so it moves a little but again not responding later. The servo is with no load, the problem is not in the rx. The wires are orange,red,brown. I suppose my rx uses the futaba type of servo conectors. white,red black. But they are the same! Help me please!
Reply:
stgram12 (2 points);
I forgot to say that it fixed itself, maybe a bad connection. A opened it 3-4 times and it was all right!
Daveb50 (8 points) 6/21/2009
WARNING These servos can be found on eBay and other asian sellers at close to this price, however be warned, they do not contain Taiwan/Japan components. HexTronik (the manufacturers of these servos) have two standards, one is for local sale, and the other is export quality with imported connectors and resin gears from Taiwan and Japan. Our HXT500 and HXT900 are export only, and not built for the domestic market. Looks like HC decided to sell the not so good clones- under the Turnigy name. LOL.
valentinortu (12 points) 6/6/2009
bastante buenos, yo los utilizo en aviones de depron creados por mi y os aseguro quelos fuerzo bastante, aguantan mui bien
shah123 (47 points) 5/9/2009
Here is a dumb question (I am a newbie): Would this work with 2s 7.4v lipo? The voltage rating is 3 to 6v in the specs above.
Reply:
Kendall (6 points);
There are no dumb questions. The servos are powered off the receiver. In an electric application the ESC (specifically the battery eliminator circuit, or BEC, portion of it) steps the voltage down to ~5V to power the receiver and servos. As a receiver battery in a high voltage electric or fuel plane a 2s lipo will need a standalone BEC to step the voltage down.
shah123 (47 points);
Ok, great. I thought the voltage from the battery is directly wired into voltage terminals of each and every servo output of a receiver. But now I know that it is not a passive internal connection, instead it actively steps down the voltage. Thanks.
Steve (2 points) 5/3/2009
Has anyone had an issue with these servos failing to travel completely on a Spektrum 6100 RX?. I had checked these with servo tester on the bench and was getting about 60 degree travel. When installed and connected to AR6100 am only getting about 30-40 degree travel. Dual rates and travel adjust on DX6i RX are set for 100% and 125%, respectively. There's NO binding in linkages or control surfaces.
Reply:
Majklus (12 points);
It is normal for Spectrum radios that servos have with them a smaller range of movement. For bigger range you can set mix on your transmitter. For example mix rudder to rudder, elevator to elevator,…
jeff (6 points) 4/26/2009
In the above description why do they state "Our HXT500 and HXT900 are export only, and not built for the domestic market". Are they not for U.S. sale? I like all the feed back about the quality but cant understand why they say not for the domestic market. Any comments?
Reply:
Beaufighter (755 points);
Because this is a Hongkong site? And then the domestic market is China. (Not everything on the net is from USA:)
John USA & PHP (23 points)
Replacement gears for HTX900 servos?
Bought 4 servos. all centered well and had the rated torque.
Replaced two HS-55 servos on the ailerons of my Easyglider electric because they were worn out and not centering well after 116 flights. The two HTX900 servos had gear failure after 12 flights.
I am now trying the second set of servos with the same control geometry and a 30% reduced servo arm length. Time will tell if these servos are up to the task.
MadMartigan (45 points)
Vid of me testing the HXT900 servo as a tail servo on a HK450 Heli.
Reply:
Grega (1 points);
good servo motors for little money, I always park in any flayers. Highly recommend, good quality for low price!
REALLY GREAT SERVO! I think it is the best servo in this price and weight range! They are really fast and without problems to use! Recommended!!
Super Servo! Sehr schnell und eine super Rückstellgenauigkeit! Benutze für Servos in dieser Größe nur noch die HXT900 und bis jetzt ohne Ausfall oder irgendwelche Probleme! Sehr zu empfehlen!!
206 people like this review.
CHEAP AND GOOD!
Merrill Chia
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Woot! These are da Bombs@!! don't waste your money on other servos.. these little things perform as good as HS-55's except that when the gears strip, you simply replace them with a new one because of their low cost! They strip only on really hard crashes just like the hs-55's.. get more of these! i'm ordering another 10 just to keep them! good servo's for any foamie... i use 6 of these on my bipe..
147 people like this review.
Fast and strong, but thirsty
Anders Höglund
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These gems are fast and strong, a bit noisy perhaps.
There is a downside of beeing strong and fast, they draw quite a bit of current. I measured about 550mA when exercising one HXT900 without load. This is an average, it seems to require more peak current. If used together with a linear BEC it will cause voltage drops.
I tried 2 HXT900 with a 1.5A BEC and a Spektrum AR6200 Rx. I could not exercise those two without loosing power to the Rx and cause it to a "BrownOut Reboot". With four servos connected, I could not even touch the control stick. The BEC circuit also got so hot it melted its plastic sleeve. Still works though, did not fail completely.
I tried with a larger ESC, having a 2A linear BEC, and it worked much better. But I could still force a "brownout reboot" by wildly excerise all four servos. I dare not fly my Pitts this way.
So, with four servos or more and an AR6200 Rx, I think you must use a larger switch mode BEC capable of 3A at least.
This is a combined problem of high current surge, poor power supply and voltage sensitive Rx. And maybe poor filtering of the powerline. Not really a problem with the servos as such. /A
138 people like this review.
Can't beat these if they were
Anthony Manti
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Alot of flyers in the area are just loveing these. Similar, and in some aspects superior performance to the famous HS-81 at one quarter the price.
Here's some stats from the forums here at Hobby City:
Results in degrees/sec.:
@4.8V 450 @6.0V 560 Results in sec/60degrees.:
@4.8V 0.13
@6.0V 0.11
Torque Centering 1.3 .2
82 people like this review.
HXT900 Hitec HS-65HB slayer
Quinton Marais
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These HC babies kick Hitec HS-65HB's into the weeds starting with a massive 6:1 price ratio saving and ~identical physical size26.8hx23.2Lx12w mm at 9g. They use their own horn spine type however and good quality copper servo wire, and make a similar noise. My tests show very slightly higher power drain than a HiTec HS-65HB @4.8v smooth flying/hard reversals/stalls @/speed HXT900 160ma/290ma/690ma/0.14-60° (side-by-side with Hitec) HS-65HB 135ma/260ma/545ma/0.14-60° I have bought more than 30 of these and never did one give a problem with normal park flying/crashes and they work fine at 6v but be aware the current will rise to 190ma/370ma/690ma for your BEC. This servo allows you to own and operate 6 models where Hitec would limit you to one model. You decide. My recommendation is get more for less - they are basically the same spec. Sure we all have a few models that we like to run expensive servos on, but these HXT900 are the base to build a big pyramid on, and spend the money you save on buying more airplanes and helicopters. I don't consider them anything like a HS55 which = HXT500. 5 star performance for a 10 star price.
68 people like this review.
Customer Rated
spcortico
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These are really nice servo, and you get seven of them included shipping, for the price of one in Portugal. These servant are fast and very accurate, and the price is fantastic. Five stars.
63 people like this review.
Very good servo
kyehwan lee
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This servo is comparable to HS-55. Faster, stronger than HS-55. Very good servo at great price!!!
I purchased these servos to install in my new Precision Aerobatics Addiction 3D plane after using this manufactures servos in my PA Katana Mini using the HXT500 servos. I found the HXT900 to center more precisely then others I have tried/tested, are quicker in response, weigh less and are just to inexpensive not to use. This manufactures servos are in 3 of my planes as well as in 4 other of my friends and have not had any failures (over 4 months) as of yet. I HIGHLY Recommend these servos.
43 people like this review.
HXT900 Servo
Tal Aviv
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Similar to the TowerPro SG90 (Same one). Great little servo, hight torque. Great for foamies and small planes. I bought 12 of these. Really really great price. Buy it, you wont regret.
34 people like this review.
HXT900 9g / 1.6kg / .12sec Mic
Hans Jürgen Wohlgemuth
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Great deal! They seem to be very precise. Weight is about 10.4g but that doesn't mind. They are a real alternative to HS55 although height differs about +3mm. Think, i'll buy more of them.
Fast and precise servo, its not sturdy as hitec 65, but the price makes it better. If it breaks just replace it. Centers well and is quick response.
28 people like this review.
Great Servo for the price
Thomas Murray
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This servo is great for the park flyer in your hanger. It is everything they say and more. Size : 21x12x22 mm / 0.74x0.42x0.78 in Voltage : 3v ~ 6v Weight: 9.5g not 9.0 as they claim Speed : 0.13 not .12 as they state sec/60(4.8V) Torque : 1.5 kg-cm not 1.6 as they state Worth the price Teflon Bushing, 15cm wire, coreless motor
25 people like this review.
Customer Rated
wayne settree
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bullet proof your hxt900 use the brass gear from a mks s1618 gear set only the brass gear fits its the only one you need any way for a couple of dollars it beefs up your servo takes only a few minutes remove the horn undo the 4 screws at the bottom wiggle the top off with long nose plies pull the pin out pull out gear drop in brass one lube it and your done .
24 people like this review.
servos
KIM NGO
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Man, for the price, these are really hard to beat since they seem to perform like the HS-55's. I'm using these in my mini-wings...the 16-20 inchers
20 people like this review.
HXT900 servo on Axe CP
Alon Almog
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I've installed these servos on my Axe CP to replace to stock ones. These servos are definitely better. Quicker and quieter.
The only drawback is that they are reversed compared to the original servos. This is not a problem if you have a computerized radio system as you can reverse any channel you wish and on board eccpm will support it. It IS a problem if you're using the stock TX like me, reversing channels will not reverse eccpm! This essentially means you can't reverse servo channels.
I fixed the problem by connecting the left servo to the right channel, the right servo to the left channel and flipping the forward servo so that it's directions will be reversed too.
After that, the heli's response is much faster and more accurate. It seems to draw less energy as well I get slightly higher flight times (maybe just need less intervention to keep a stable hover).
One drawback is that I can't seem to find replacement screws for the servo arm - do not lose yours!
18 people like this review.
Customer Rated
softimagge
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Perfect servo.
See video "How to change". http://www.youtube.com/watch?v=KhfKf1LT_cw or at HobbyKing videos. www.nitroylitio.com\foro
17 people like this review.
HXT900 9g
Patrick van Gompel
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These servos have always worked for me. I glue them in all my depron models since they are so cheap. I bought a dozen of them and none of them has failed after a year of use. Since they work on an unusual low voltage (compared to other servos) they are a great combination if you use them with 1 lipo cell (3.7Volt) as they still have enough speed.
16 people like this review.
HXT900 9gm Servo
Peter Richiuso
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Don't waste your money on any other servos. These are the best in their class. Tight, precise, fast & strong. I have a bunch of them in my electric fliers and have had no problems. I've got over a dozen and I'm buying more.
16 people like this review.
HXT900 9g Micro Servo
Jean-Pierre GUINGAND
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I purchased these servos to fit in replacement into my heli HoneyBee King 2. The size is a little bit taller than the originals ones. You have to cut 0.5 mm on the fixation arm, and only on one side, the farthest to the rotation axis. You can use the delivered screws, the length is good, but the head is too large. Just shape it ! They work very well, the neutral point is quite good, and they've got the same (excellent)speed, wich is very important when you fitted them on a CCPM heli. For me, satifaction guarantee at the best price !
14 people like this review.
Customer Rated
DABZ
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This is a cheap and good servo. It is a good choice because the customer also can buy the replacement gear set, then, if the gears broken you don't need buy a new servo, only change the gear damaged.
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