Is there a servo (preferrably JR) that fits entirely inside the fin cavity of the Skymaster F18, without having to make a 'bulged' cover plate. The cavity in the F18 fin(s) are very thin, and therefore available servos to fit would be hard to find.

Presently flying Skymaster F15 with full tank/missile load, and building Libertrau Dual seat F5f (3.46 metres long)

Any help on the servo type would be appreciated
Dave Burns
Australia

Yes there is..............Its the JR DS 168 digital servo...Im using this servo on my SM F-18 rudders and ailrons !!

Tommy

Ditto on the JR DS168.

See Post #4 on the Skymaster F-18 build thread, [link=http://www.rcuniverse.com/forum/m_2039546/anchors_2039546/mpage_1/key_f%252D18%252Cbuild%252Cthread/anchor/tm.htm#2039546]here.[/link]

Barry

HI Dave

You could also use the Multiplex wing servo or one from Hitec.

Ed

I'm using the Hitec HS-5125 digital servos with the RDS internal control system on the rudders. Everything is hidden inside the rudder.

Nick

Hello Dave

I have used or seen all 3 servos used in the rudders of the F-18's They all work well using Rotary drive system, or std linkage.

http://www.proptwisters.org/rds2/index.html (RDS link)

JR DS168
Hitec HS-5125
Multiplex Super FL

Gidday Guys,
great to find out what is being used successfully on the bug. Acouple of you blokes mention RDS drive?? What and where available,???
beauty
Dave

Whats the minium Torque servo needed for the S/M F-18 RUDDER??

Hello Basimpsn

The servos mentioned all have around 52 oz of tourqe and seem to do the job well. Im just not sure what the lower limit would be. The space available will dictate your choices on servos. I would use a metal gear if possible. PM me if you want to talk about it on the phone I would be happy to talk about the F-18, and give you whatever info you needed.

Dave use this link for the RDS, information and supplys.
http://www.proptwisters.org/rds2/index.html (RDS link)

Hi Burnsy!

I bought the hitec 512smg's for my F18...nice lokking unit and vvverrrry thin!

Talk to you soon.

Craig.

Hello Dave,

I do not know how the rudder fins of SM are set up, but I plan to do the following with my F-18C, to avoid visible links/rods.

The fin is removable to the direction of the hinge line (upwards and a bit outwards). I will mill a small area in the base of the rudder to be able to glue a 1/2 alu or plastic servo horn directly to the rudder with epoxy and milled cotton. The attachment is stranghtened with 2 M2x10 bolts first attached to the servo horn. The servo screw hole has to align with the hinge line. Also the horns have to be a tight fit to the servo output shaft. Now you have the fin with the rudder and the rudder has servo horn in the base of it. The servo is then mounted to the fuselage so, that just the servo output shaft will be visible above the fuse skin. Align the shaft with the horn and finalize the servo attachement. No servo screw is used, as when the rudder/fin is inserted and secured to its position, it will keep the horn from moving up.

This way you can use the size of servo you can put in the fuselage and no links will be visible. But this requires small clearanse between the fin base and rudder and this we have in our plane. I do not know how it is on the SM Hornet.

I first planned to use DS368 for this, but will now propably make it wiht DS168 or DS3328 due to side mounting possibility.

Hope the explanation is clear to you. If not, I can make a 3D picture of it...

BR,
Jussi

Great looking plane...ordered one this week. SM F-18F.

I personally pefer the SM F-18C the landing is better but you will be fine . Wow can't believe its almost six yrs since i bought my blue angle .

Wait almost forgot : Just my Opinion

Hi,

I know what you mean. I still regret selling my SM BA F18C. Pianted in the mould with simple setup can fly all day.... So i decided to tackle my all time favourite color F18C. Took the SM kit down from the rafters and did a build and paint in 7 days. Just maiden it today. Man what a nice jet. My 1st go at airbrushing a tiger. OK for me, but the experts might not like it... Now to do this same color on my YA F18 twin...

Regards

Morne

wondered how everyone has done the set-up as far as flaps/ailerons. Does anyone use crow ? is it needed ? Are the flaps and airbrakes sufficeint?
Was going to Y the ailerons as the previous owner had but if needed that would give me options.