Slowing down retracts

[victor hull]

Misunderstood the function of Simprop's servo delay modul. It doesn't slow the action of the retracts, it slows the start of the action. Is there a device that slows the retract action ? This is my setup: Hitec Eclipse 7 (fm mode), Hobbico retract serco, 6 volts using the retract switch. The airplane is Hanger 9 P-40 converted to electric power. Thanks for any reply. Vj :confused:

[jkettu]

Sorry, there is no way to slow down a retract servo. A standard servo could be slowed with relatively simple electronics, for more information search or ask on the DIY Electronics page.

[victor hull]

jkettu: Thanks for youre input. I know there is a way but it may be to expensive for the market. I read where Airtronics had a retract servo that slowed the action but I understand it is no longer available. Vj

[flyinazn10]

sureflite makes a product that slows a servo down. cant say if its good not, but im sure it works

servo rate reducer (http://www.sureflite.com/sureflite/products.php?mc=Servo%20Accessories&sc=Smart%20electronics&dtl=SVRR-PKG-01&offset=0&pid=SVRR-PKG-01)

extra slow servo rate reducer (http://www.sureflite.com/sureflite/products.php?mc=Servo%20Accessories&sc=Smart%20electronics&dtl=SVRR-PKG-2&offset=0&pid=SVRR-PKG-2)

[Scoobyvroom]

http://www.rc-cam.com/ldtastic.htm
Rc_cam has a great product You can by the chip from him all set and ready to go. You need to make a small circit board but it dosen't take much and it will run Nav lights, a strobe and even turn on a landing light when you put the landing gear down..

The chip I think was only a couple dollars if I remember right Rc-Cam is a great guy to deal with..

Chris

[flyinazn10]

definetly, hes a great guy. im about to order something from him as well, will be ording a chip tonight :D

[Brian Wa]

Most modern computer radios have a function which enables you to "Slow" the servo.
You simply dial in how long you wish the servo to take to complete it's travel.

Ideal for retracts, fit seperate servos to each U/C leg and have sequential retract function as seen on a lot of WW2 fighters where one leg retracts at a different rate to the other.

Brian

[flyinazn10]

ive heard of that, i think JR has them, i know hitec doesnt, dont know abuot other manfuactres though

[HarryC]

The problem is that retract servos are not proportional. They are like a light switch, they are either at one end or the other and they don't recognise an in between. They can not be slowed down, because they do not recognise a slowly travelling signal. That's why your simprop appeared to delay the retract, when it fact it was generating a servo slowing signal. The retract servo only responds to a signal being one side or the other side of neutral. The servo slowed signal sets off from one end of travel but a retract servo ignores it until after some time the signal passes through neutral to the other side, at which point the retract servo sets off at full speed to its other end of travel, overtaking the slowed signal!

Airtronics/Sanwa used to make a proportional retract servo but sadly they appear to have stopped a year or more ago.

Harry

[HarryC]

sureflite makes a product that slows a servo down. cant say if its good not, but im sure it works

servo rate reducer (http://www.sureflite.com/sureflite/products.php?mc=Servo%20Accessories&sc=Smart%20electronics&dtl=SVRR-PKG-01&offset=0&pid=SVRR-PKG-01)

extra slow servo rate reducer (http://www.sureflite.com/sureflite/products.php?mc=Servo%20Accessories&sc=Smart%20electronics&dtl=SVRR-PKG-2&offset=0&pid=SVRR-PKG-2)

Please note that these devices do not work on a retract servo, the blurb on the website confirms this.

[HarryC]

http://www.rc-cam.com/ldtastic.htm
Rc_cam has a great product You can by the chip from him all set and ready to go. You need to make a small circit board but it dosen't take much and it will run Nav lights, a strobe and even turn on a landing light when you put the landing gear down..

The chip I think was only a couple dollars if I remember right Rc-Cam is a great guy to deal with..

Chris

Please note that these devices do not work on a retract servo, the blurb on the website confirms this, it is only suitable for a normal proportional servo which has the strength to operate a park flyer's retracts.

[shanghai_fool]

I hve used this and it works great with proportional servos, not retract servos.
http://www.emsjomar.com/SearchResult.aspx?CategoryID=6

Includes door channel also.

[rcguy01]

My issue is I would like
to slowdown the Air retract gear
but I do not know how? please help.

thanks.

[Scoobyvroom]

To slow down air retracts you would need a valve to reduce the VOLUME of air into and out of the cyclinder to reduce the speed. Another Idea would be to use a pice of brass rod and drill a small hole right in the middle. Vary the size of the hole changes the speed..

Chris

[femi]

Hi, am no pro, but from what i've read so far, my advise is that you get yourself a JRXP9303 radio; its got a neat feature thats called "Servo Speed",and this allows you to slow down the action or speed of the servo(particularly retract servos) in order to achive a more realistic scale configuration. Its an expensive option, but its the only one i think of;

Hoipe this helps

[Brian Wa]

Femi

See Post No 9 by Harry C

Servo slow does not work with dedicated retract servos, which just travel from end to end with no proportional control inbetween.

Brian

[techguy]

Robart sells air line restrictors. They go in-line with the air line. They are cheap and work great.

[pgleesonuk]

I've found a product that may help here.
http://www.servocity.com/html/180o_servo_stretcher.html (http://www.servocity.com/html/180o_servo_stretcher.html)

It says you should be able to use any normal proportional servo to get 180 deg movement.
You will need to check there are no mechanical stops in the servo

This page has some info on which servos should be capable of 180 deg movement. (mostly Hitec)
http://www.lynxmotion.com/Category.aspx?CategoryID=38

I converted the a Futaba S148 servo, but this might no have enough power.
http://mypage.yhti.net/~dmcdnld/s148retract.htm

It's an old thread, but I hope this helps someone.

Paul

[pda4you]

Airtronics makes a proportional retract servo....

http://www.hobbyoutlets.com/airtronics/94739.htm

Mike

[pgleesonuk]

Not sure they still make it. It's not on the Airtronics website

Paul

[MarkusN]

Robart sells air line restrictors. They go in-line with the air line. They are cheap and work great.
Pneumatics should be throttled at the exhaust. Gives more controlled action as the piston is clamped between two cushions of high pressure air.

[pda4you]

Not sure they still make it. It's not on the Airtronics website

Paul

Sorry that is too bad. You can use a regular servo with enough torque if the rotation is great enough.

Mike