Mechanical Retracts 3.5mm x 140mm long (PAIR)

 Spitfiery 7 points

you can use HK-5094 they r about 5 dolars each and easy to use you dont have mess with servos and these retracts are heavy for your warbird

 Andriy 102 points

if one servo for both more than 9 g. 12,5 g 2,5 kg will be enough

 Antonio 31 points

you can buy in hobbyking the Turnigy S3101S Servo. I use that servo for the retracts.

 Vallekano 8 points

This mechanical retracts doesn't work very well sometimes. It's very hard to move. You need a servo very strong (and expensive). I used the BMS-136 Retract Servo 6.1kg / .31sec / 28g and finally I bought two Digital Servoless Retractable system (Producto ID: HKD-312) and it worked better.

 Andriy 102 points

Can, but they are realy strong! May be to heavy for your plane.

 UniseV 17 points

My plane :
Flying Weight : 2.1Kg / Wingspan:1400mm

What is the weight range of those retracts ?

 Spitfiery 7 points

i have these on my scracth spitfire but i can say it would be better if you go for a servoless retract system they are much easier to use

 Aussie Roger 81 points

Yes you can. You have to use the opposing arms of the servo. A standard size servo, the HXT HX5010 or Vigor VS-2A can be used. If weight and space is a problem, a mini servo such as Turnigy TGY-9018MG servo can be used as long as the stall torque is sufficient. The TGY-9018MG has a stall torque of 2.4kg.cm

 rc speed 276 points

yes
i have this on p 51

 atish 333 points

any pictures??

 Spitfiery 7 points

i have it on my balsa spitfire about 125 cm (49 inch) you can see it under videos tab.

 Dannyel 11 points

somente para um lado,sendo o acionamento para dentro e para fora e nao precisa ser com servo de retratil pois o curso da alavanca é pequeno,dependendo do tamanho do seu aeromodelo ele caberá perfeitamente.

 Antonio 31 points

Yes you can reverse the mechanism. I'm using it on my spitfire with one servo.

 rcDawson 70 points

You can use one but it is probably best to have two metal geared servos.

 Antonio 31 points

You can use one servo that travels 180º, and if you need to adjust the travel distance you can buy in hobbyking an Adjustable Retract and Door sequencer w/Display.

 apasajadehbebas 11 points

i think its to big if you use for skyfunjet, i use it for big plane. may you use this www.link

 emenems 21 points

This chassis is ideal for small aircraft with a span of up to 1m.

 ste.26 2 points

These retracts are appropriate for models under 3 kg.

 ottod 24 points

Yes. They are good quality and I would say good up to a 9 lb. model, much more than 3kg.

 Denilson 4 points

ótima mecanica adaptei em um tucano de 1mt de envergadura ficou d

 Handerson 9 points

MUITO FORTE, SERVE EM AVIAO 40 A 60.

 spitfire2010 640 points

These are really strong and I would have no issue on a 9lb plane. I have swapped out the originals on my planes and gone with these.

 Rotatorus 23 points

Building mainly smaller size electric powered planes, these retracts were a bit too big and heavy for my plane. Probably will be ok for your's.

 bwoollia 320 points

The gear will retract when the connecting rod coming out is pulled. You need to adjust the amount the servo pulls - this is usually accomplished by adjusting the hole you connect on the servo arm.

 Andre 1 points

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 Carrascal 37 points

Thats nice! Thank you guys!

 ottod 24 points

I usually cut a piece of plywood in a U shape, mount the retract and epoxy glue to wing. This is a push/pull setup so one servo in the center of the wing can actuate both retracts.

 meshy 116 points

You install them by making two holes in your wing, one for the box, and one for the wheel at the other end, with a channel for the wire between them. You then need to mount a servo so that it can push and pull on the thinner wire coming out of the box. pushing that makes the large wire rotate between the two positions shown. It will also lock the wire in the up or down position via a clever mechanism inside. this is a fairly big landing gear, suitable for maybe 2kg models. They are far too large

 bwoollia 320 points

I'm using the BMS-136MG which is available here at HK. $15 and change.

 killioughtta 426 points

Does anyone know if it can be used with 9-gram servos?

 bwoollia 320 points

A 9g servo would not have enough torque - it will likely burn out.

 Andre 1 points

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 bwoollia 320 points

The wire can be bent. Some people have complained that the wire is brittle and should be heated first, but my wires bent nicely.

 Andre 1 points

I bend the landing gear and installed 90 degrees to lock the wheel nuts. looks good.
I used these nuts from HK - Landing Gear Wheel Stop Set Collar 6x5.1mm

 Fugitive_Bill 418 points

Oh Let me ad, they are made of that strong nylon plastic, not that rubbish the GWS are made of. They also have plently of up/down lock 'play' to avoid servo buzz/binding.
Just one problem they ar are a little large for a ParkFlyer but the mod to fit them to your plane is worth it.
Hope that helps, and enjoy!

 __VIZ 76 points

What's a good servo to use on these if you are using it on a Parkzone Corsair?

 Eric1180 2276 points

No there isn't a nose retract. Stop imagining thing just look at the picture.

 bwoollia 320 points

You can use a third one as a nose retract (non-steerable!) if you buy two sets, you'll have a spare.

 lmcooper 49 points

Can this retract be modified for a spitfire? So the leg retracts outwards with the mechanism wire being pulled from the inside still?