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All Forums >> RC Airplanes >> IMAC >> HI TECH 5945 SERVOS
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HI TECH 5945 SERVOS - 12/18/2004 11:15:41 PM   
xtra 330


 

Posts: 315
Joined: 9/9/2003
From: Dallas, GA, USA
Status: offline 		Just curious if the people running these servos have any opinion on them...the good,the bad,or the ugly.Going in a 40% Cap....you think it will be OK??
       Post #: 1

RE: HI TECH 5945 SERVOS - 12/18/2004 11:33:33 PM   
Vic3D



Posts: 358
Joined: 6/23/2004
From: Caguas, PUERTO RICO (USA)
Status: offline 		40% Cap.hmmm... Yes they'll be good for everything. If you are planning to be very aggressive with 3D moves and such, I would personally put the 5945's on the ailerons and the elevators and rudder with some 5995's. Just my 2 cents.

(in reply to xtra 330)
       Post #: 2

RE: HI TECH 5945 SERVOS - 12/18/2004 11:33:33 PM   
Leardriver



Posts: 490
Joined: 4/3/2002
From: Piscataway, NJ, USA
Status: offline 		boy you are about to open one gigantic can of worms! There are definitely schools of thought on these servos...I for one will never have another in any plane I own. I know personally of several others that have lost planes due to failures of this particular servo and Hitec claims that there are no problems. It's your money but my $$$$ is spent on either JR8611s or Futaba 9152's. The 8611's have proven to very strong and reliable and the Futaba looks to be the same if not better (it's a physically bigger servo and may not work in all planes). The 5945 is certainly strong enough to do the job but I personally just won't risk my high dollar planes to Hitec. Others have had good luck.

Leardriver

(in reply to xtra 330)
       Post #: 3

RE: HI TECH 5945 SERVOS - 12/18/2004 11:56:28 PM   
Forgues Research



Posts: 3412
Joined: 12/15/2001
From: Glen Robertson, ON, CANADA
Status: offline 		There is absolutely nothing wrong with these servos, if they are installed properly.
For 40% though, I would look at the 5995's . Two for ailerons would be overkill, but good, one only on each elevator halves and for rudder, look at the Seiko servo. with 1800 oz of torque, That is what I have on my 52% Edge.

Roger

Forgues Research

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(in reply to Leardriver)
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RE: HI TECH 5945 SERVOS - 12/19/2004 12:11:24 AM   
xtra 330


 

Posts: 315
Joined: 9/9/2003
From: Dallas, GA, USA
Status: offline 		yeah i know,,i dont want no battles going on..these servos came with the plane...i think i can handle them on the ailerons...but not on the elevators...there are 4 ganged for the rudder...but i am thinking 3 8611's...

(in reply to Forgues Research)
       Post #: 5

RE: HI TECH 5945 SERVOS - 12/19/2004 2:59:32 PM   
jonkoppisch



Posts: 1932
Joined: 12/17/2001
From: Wilmer, AL, USA
Status: offline 		They work fine in my 40% planes. I have 1 5945 on each elevator also.

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       Post #: 6

RE: HI TECH 5945 SERVOS - 12/19/2004 4:37:55 PM   
Leardriver



Posts: 490
Joined: 4/3/2002
From: Piscataway, NJ, USA
Status: offline 		While I said before that many people have had good luck using them....but be aware that there is a disproportional amount of reports of "hardovers" with these things. WITHOUT FAIL hitec reps and supporters automatically blame the user claiming he has no idea how install or setup a servo...and GOD FORBID it was on a ganged setup! Oh my GOD! Naturally nobody knows how to "properly setup" a ganged installation..."it has to be the fault of the user". If you had a failure do not expect anything but "what did you do wrong" from the reps and supporters beecause they "have never heard of that happening before". Hitec is great about replacing bad servos....they should be pros at it by now....but that does nothing for your $5000-$7000 plane that is now splinters. They can claim whatever they want but do yourself a favor and do a simple search for "Hitec failure", than do one for "JR failure"...and than do one for "Futaba failure". You can of course substitute 8411 or 8611 for JR...but read the threads! If you actually take the time you are goin to see that even in the JR theads the word failure is most often describing a Hitec servo. I am not making this up......just do yourself a favor and check for yourself. It makes no sense to me to risk a $5000+ airplane to save $150 total to use Hitec gear. If it still seems like a good idea I wish you the best and hope that you have a positive experience and enjoy your plane for many years to come. But do it with your eyes open! They have a reputation for a reason...just like JR8411's had a rep for wearing out gears quickly and "pulsing"...it is true! But you rarely heard about them being the cause of a crash! Naturally you can always find an example but it's rare. The 5945s will be adaquate if you gang enough of them together powerwise and the gears seem to hold up well enough......it's just the reliability factor that makes many of us say "not in my plane".

I am sure all the hitec supporters are gonna go crazy on me here so I am gonna not post to this thread again about this.....just do your OWN research and draw your own conclusions. Not mine or anybody else. Good luck with your project.

Leardriver

(in reply to jonkoppisch)
       Post #: 7

RE: HI TECH 5945 SERVOS - 12/19/2004 6:35:57 PM   
bentgear


 

Posts: 2742
Joined: 3/25/2002
From: Brandon, MS, USA
Status: offline 		xtra, just make sure you use good extentions and that you have good connections. With these precautions they seem to hold up as good as any other brand. If you get a loose connection you can expect weird things to happen.

Ed M.

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       Post #: 8

RE: HI TECH 5945 SERVOS - 12/19/2004 6:57:16 PM   
islandflyer


 

Posts: 520
Joined: 6/23/2004
From: Kaneohe, HI, USA
Status: offline 		On my 33% Cap, I replaced the JR 8411's with Hitec 5945's all around. This allowed me to remove all Matchboxes, thereby removing extra sources of potential problems. With careful programming of these servos, they end up perfectly matched. I since had hundreds of flights with no problem until last week-end when the engine quit in a torque roll, and I lost the plane. These same 5945's will go in my new 33% Extra. They are great servos. I am not prejudiced: I have Futaba 9152 in another GS plane.


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(in reply to bentgear)
       Post #: 9

RE: HI TECH 5945 SERVOS - 12/19/2004 11:44:59 PM   
A320driver


 

Posts: 188
Joined: 2/5/2003
From: phoenix, AZ,
Status: offline 		Hundreds of flights over many years, never lost one yet!

(in reply to islandflyer)
       Post #: 10

RE: HI TECH 5945 SERVOS - 12/20/2004 2:48:13 AM   
JohnVH



Posts: 14747
Joined: 12/5/2001
From: Lynden, WA, USA
Status: offline 		Do a search here on RCU.. then see what you think.. Like leardriver, I wont touch them either. Personal preference from all the crashes Ive read about here and in my own club.

SO, that said, I personally go JR, then futaba. 8611 is an awesome servo, with 14 of them in my Yak Im very happy.

< Message edited by JohnVH -- 12/20/2004 2:50:19 AM >

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       Post #: 11

RE: HI TECH 5945 SERVOS - 12/20/2004 3:39:53 AM   
Leardriver



Posts: 490
Joined: 4/3/2002
From: Piscataway, NJ, USA
Status: offline 		For the record...a little birdie whispered in my ear that JR is soon to release the 8711! 330oz torque at 6v and it is utilizing the same size case as the 8611. If it is anything like the 8611 it will be a winner! I bet Futaba has by years end as well.

Leardriver

(in reply to JohnVH)
       Post #: 12

RE: HI TECH 5945 SERVOS - 12/20/2004 4:12:16 AM   
JohnVH



Posts: 14747
Joined: 12/5/2001
From: Lynden, WA, USA
Status: offline 		Jeez! GO JR!

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       Post #: 13

RE: HI TECH 5945 SERVOS - 12/20/2004 5:51:38 AM   
epc



Posts: 566
Joined: 1/24/2002
From: Miami, FL, USA
Status: offline 		Jr.

epc.

(in reply to JohnVH)
       Post #: 14

RE: HI TECH 5945 SERVOS - 12/20/2004 3:16:39 PM   
Geistware



Posts: 12946
Joined: 4/9/2002
From: Locust Grove, GA, USA
Status: offline 		I have 8 of them and they work fine.
As with any metal gear servo, the gears wear out.
I would also make sure that your wiring can handle the current.
I found that I had to change some of my wiring to improve power distribution through-out the whole plane.

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       Post #: 15

RE: HI TECH 5945 SERVOS - 12/20/2004 8:21:31 PM