Q regarding servos and a 33% lanier laser.

[Chris Cann]

I was wondering if anyone could tell me if hitec 5945's would be ok on every surface for this plane, It would have 1 for rudder, 2 elevator servos, 1 per aileron.

[sarawnty]

Chris,
They'll work great. Wasn't that long ago we were using 1 JR 4721 on each aileron on our 35% planes. Not sure how big the rudder is on that plane but you may want to consider 1 Hitec 5955 or 5735 on the rudder.
Steve

[Gary Maker]

I am going to be using Hitec HS5945MG servos on my 34% Edge

However, In doing some research and asking a thousand questions, I have been told that it would be a better and safer idea to use two servos per aileron. Ailerons are a large control surface and very long of course. So in using two servos per aileron, it would provide greater servo power and spread the load out more evenly.

I am sure that a 5945 @ 181 in oz torque at 6.0 V would probably be enough power for the rudder, but I have decided to still use only one servo, but it will be an HS5745MG with 260 in oz torque at 6.0 V to be on the safe side!

This is the way I am doing my plane but some may have other ideas so lets hear with others have to say on this subject as well!

NOTE: Hitec has discontinued the HS5735MG and replaced it with the HS5745MG. Basically the same servo but configured slightly differently and with slightly less torque!

[Chris Cann]

thanks guys, the rudder isn't large...I will also look into the other servos you guys have mentioned but I keep reading abot the 5955's having problems because thats what I originally had for my rudder choice. Also the ailerons only have one servo slot and Ron was only running 1 servo. I think the 5945's won't have a problem on the ailerons.

[WildBill]

Hi Chris, I had the lanier edge that i sthe same size, i was running a 1 5645 per surface and a 5735 on the rudder and had lots of power, the 5735 has been replaced by the 5745, same thing basically and a little cheaper than the 5945, also a little more power.

[Chris Cann]

thanks for all the info everyone, I noticed the 5745 is a 1/4 scale size so I will have to measure the rudder cut out and all the other cut outs to see what servos will fit.

[ronm]

Hi Chris, you will have no problem with the 5945 on rudder.
You may want to use standard size servos on the ailerons and elevators though.
Anything over 120 oz will be fine.
Make sure your linkages are solid, and don't overspeed!

I had 4721's all around, and they were fine, although the rudder could use a bit more power.

[Chris Cann]

I was lookign at servos and the Futaba 9351's aren;t that much more then the regular price of the hitecs so I'll probley just get them as they are faster and have more torque.

[davida]

Hi Chris

I flew my Laser for 5 seasons with the hitec 605s without any problems. 1 on each aileron 1 on rudder and 1 on each elevator.

Dave Asquini

[jamesbissonjr]

Not sure what the equivilant would be for JR servos Chris but when I had mine I flew with JR4721's on ailerons and elevators with 1 - JR8411 on rudder.

[Gary Maker]

This is just a bit of info I just read in the latest 3-D Flyer magazine so I am only quoting what the article said and is not my personal opinion!

In the March/April Magazine, Page 56, Article:"Servos Drive the Airplane."
It states that someone building a large airplane, should use a minimum of two servos on the rudder. The writer recommends 3 servos for maximum power and controlability! On airplanes larger than 35% he recommends 4 servos on rudder! According to him, he said that one servo will work on a 33 - 35% plane but he said he always uses 2 min. and that he can feel the control difference between using 2 servos and going to 3 on the rudder so now he uses 3! Seems a bit extreme to me but this is what he recommends!

He's not talking about just any old standard servo either. He's recommending high torque digital servos....three or four of them depending on the size of the airplane!!!!

In 3-D Flying that rudder is taking a real beating as you've seen in watching anyone do 3-D. I would think that if even just for safety considerations for this type of flying, low and slow or hanging on the prop, that at least two servos should be used! Again JMHO!

[LEE]

I am building a replica from scratch of this plane (with some minor mods to lighten things up :wink: ) and I am going to use two Hitec 5645s on the rudder, two 5625s on each aileron , one 5645 per elevator, standard digital futabas on throttle and choke.
I think the rudder is HUGE and more than warrants two servos esp for 3d :shock:
Of course I am putting in a DA 100 or ZDZ 100NG (not sure which yet) so with that kinda power i want to be sure i have lots of control authority!

[Gary Maker]

Lee

I you get a chance, take a look at the article on servos I mentioned above.

I purchased 3 of the new Hitec Std. Digitals for the sole purpose of using the best servo that I could for the throttles on my gassers but may be rethinking this due to the recommendations in the article! Here is a direct quote from the Mag:

"I have been told by the "pros" not to use a digital servo for the throttle control because the motor's vibrations will resonate through the linkage and will ruin a digital servo!"

He recommends still using a good quality servo but NOT a digital! I guess everyone has their own opinions but I hadn't heard of this before and I do not know a whole lot about digital servos and how they react to certain situations! I do have other good quality servos that I could use for this application (eg: Hitec HS525BB)!

Thought you might be interested in this bit of Info!

[can773]

Lee

I you get a chance, take a look at the article on servos I mentioned above.

I purchased 3 of the new Hitec Std. Digitals for the sole purpose of using the best servo that I could for the throttles on my gassers but may be rethinking this due to the recommendations in the article! Here is a direct quote from the Mag:

"I have been told by the "pros" not to use a digital servo for the throttle control because the motor's vibrations will resonate through the linkage and will ruin a digital servo!"

He recommends still using a good quality servo but NOT a digital! I guess everyone has their own opinions but I hadn't heard of this before and I do not know a whole lot about digital servos and how they react to certain situations! I do have other good quality servos that I could use for this application (eg: Hitec HS525BB)!

Thought you might be interested in this bit of Info!

I dont use a digital on the throttle, not because I am concerned about the servo failing, but it does significantly decrease # of flights because of the extra draw from the vibration....

I dont use mini-servos either as they dont last all that long, my throttle servo of choice is the Futaba 9602. I have well over 1000 flights on this servo on throttle without any problems.

I am surprised you are just hearing about this now.....we have known about this for a few years now :)

[scaleguy]

Chad,

I guess the difference is that for most Sport Flyers they do not get the use out of the equipement that yoou competition guys do.

Think about it. We may only fly an airplane for maybee 100 flights a year if we are lucky. So the servos never get exposed to the kind of use you guys put them through.

JMHO!

[Gary Maker]

Chad wrote:"I am surprised you are just hearing about this now.....we have known about this for a few years now "

Well my friend, being the expert in this group, you should have disclosed this info to us lesser experienced flyers seeing that you have known about it for years. Actually, as Jim just expressed, I had no need for nor any idea what a digital servo even was until just reciently when I started competition, let alone how they were to be used etc.

You should take the lead here Chad and fill us "newbys" to competition in on some of the more intricate details of such things as servos and other things and how to use them for competition!

I'm surprised you didn't tell us about this years ago Chad! :wink:

[can773]

Chad,

I guess the difference is that for most Sport Flyers they do not get the use out of the equipement that yoou competition guys do.

Think about it. We may only fly an airplane for maybee 100 flights a year if we are lucky. So the servos never get exposed to the kind of use you guys put them through.

JMHO!

My post was pointing out that I noticed a loss of flight time (due to increased battery consumption) while running a digi on the throttle. Whether you fly 1 flight or 10000 flights that result wont change.

I have had mini servos on throttle fail within 50 flights, specifically the JR 341 (not sure if its made any more).

[can773]

Chad wrote:"I am surprised you are just hearing about this now.....we have known about this for a few years now "

Well my friend, being the expert in this group, you should have disclosed this info to us lesser experienced flyers seeing that you have known about it for years. Actually, as Jim just expressed, I had no need for nor any idea what a digital servo even was until just reciently when I started competition, let alone how they were to be used etc.

You should take the lead here Chad and fill us "newbys" to competition in on some of the more intricate details of such things as servos and other things and how to use them for competition!

I'm surprised you didn't tell us about this years ago Chad! :wink:

You gotta ask the right questions :)

[Chris Cann]

How about this question Chad....Can you tell us everything you know!?!? :oha: Better yet....maybe it would be easier in video or novel format :lol: :roll:

[Gary Maker]

Chris wrote: "How about this question Chad....Can you tell us everything you know!?"

Chris, you have to be realistic here! With his busy schedule where do you think Chad is going to get the extra 2 or 3 minutes to do that for you or anyone? LOL :wink:

Come on now, you know I'm only kidding! :)

[can773]

Chris wrote: "How about this question Chad....Can you tell us everything you know!?"

Chris, you have to be realistic here! With his busy schedule where do you think Chad is going to get the extra 2 or 3 minutes to do that for you or anyone? LOL :wink:

Come on now, you know I'm only kidding! :)

I gotta leave some time for my wife you know :)

For some reason she doesnt think coaching me at the field is quality time.... :roll:

[can773]

How about this question Chad....Can you tell us everything you know!?!? :oha: Better yet....maybe it would be easier in video or novel format :lol: :roll:

No problem, move to Calgary for the summer :)

[Chris Cann]

:lol: That'll be easy :roll: