I have build some jets but all without geardoors.

I always build simple (cheape) and I donīt use electronic valves (until now?)

I canīt figure out how to do it on the best way.

(Futaba FG8 Super - 3 x retract air/air - brakes air - 3 x doors air/air)

I donīt need a link for a big fully automatic electronic thing ;o)

Have you experts any suggestions

having the 3 functions on 1 channel would definitely be a challenge.
You vcan use a UP3 air valve to activate retracts and doors on the same channel, however you will have to use a separate air valve (your choice) on a different channel for brakes.
Idf you don't have doors on your models, You can use the Behotec air valve to activate your retracs and brakes on the same channel.

Hope this helps.
Regards,

BS I think the cheapest option with electronic valves is using Xicoy units from Gaspar.
http://www.xicoy.com/catalog/product...roducts_id=252

2 of theses units will do the doors and retracts and one of the single ones for the brakes total cost 120 euro add the RCBee sequencer at $59 and that is all you need. You use 1 channel for the doors and retracts and 1 channel for the brakes.

John

I have used these with no problems:

http://www3.towerhobbies.com/cgi-bin...?&I=LXCJE0&P=7

You can keep things easy to understand by using ordinary, servo driven valves
so you can see what's happening.

Only does doors & gear, you are on your own with brakes. - John.

I use the Behotec valves to day.

Maybe I should try one of these gear/door sequencers.

When you use sequencer is it still possible to adjust endpoints for the valve servos?

Thanks for link

+1 for the xicoy valves,best price in the market for its kind and also can have pulse braking

I Just bought a Xicoy valve... and it should be here today. If it's like Gaspar's other electronics... it should be great. Honestly... it's about the same price as a servo, and a mechanical valve.

BS

Yes you can adjust the end points on the sequencer for doors and retracts and also reverse them if you want by adjusting the end points from max to min. The best way to see what is happening is fit a servo and watch the arm move. The great things about this sequencer is it is cheap, small, light and it works. It has a built in safety feature that stops the gear from being retracted on switching on the transmitter. The sequencer also allows for doors to close after wheels are down if that is what you want. You can use the sequencer with servo operated valves or electronic ones.

John

John

John,

The add for the sequencer says you can use 2 servos on the sequencer, does this mean if you have multiple doors/servos you would eventually use more than 1 sequencer and use Y connectors to have them on same channel?

Thanks in advance.

Regards,

I have not tried with door servos operating the doors directly. I see no reason why it shouldn't work with a Y lead unless the current drain is too high. Not common these days to use servos to operate doors on jets though.

John

I have been using a combo between the AirPower EV-2U and the Xicoy valves and a Jet Tronics sequencer on jets. On my next build I may use the radio to do the sequencing but would mean I use more channels in the receiver. By using the Jet Tronics sequencer I only use up one receiver channel for my gear and doors. You could also always use the Airpower EV-5 which would do it all.

You can sort of see my set up. UP-2 valve (sequenced gear and doors). A clippard pushbutton brake valve and one servo.

That is maybe US$140 total and gear/doors/brakes on one channel, no special electronics

All the suggestions are good, but if you want real simplicity use radio programming instead of sequencer boxes. Doors and gear can be mixed using a master switch and two point curve Pmixes. Combine gear and brake in one Behotec valve. There are ways to eliminate gadgets.

Thanks

The radio is a the best way if you have enough channels but if you just want to use up one channel than the sequencer is the best choice has you will plug in you retracts and doors to the sequencer and then just have the one servo lead going to you receiver. Now Todd at Dreamworks will be coming out with Electric actuators for doors to go with his E-brake and E retracts which will be all control with his Xicoy controller. I used this set up on a Turbinator and it was so nice to just be able to fire up and go no worries about air. By far his E retracts are the best I have seen on the market. By the way they actually work every time also. We are about another month or so from the E-door actuators. I will be converting my gear in my Hawker Hunter, Viper, and others to his system.

Please tell, do you speak Futaba?

Although the EMS sequencer it's simple & cheap, one less gadget the better

I'm using a 12 FG with the 14 channel software. - John.

This is a great system. I saw it in action at Georgia Jets. Every time we flew the Turbinator, it was nice not to have to "air up" before take off! Both the gear and brakes worked every time. Well, except for the time we forgot to plug them up and had to fly the whole flight with the gear down. Sorry Jose, hate to tell on us, haha.

Paul,
it was really nice not having to worry about any support equipment for the Turbinator. When will you switch your Velox to this system. Todd at Dreamworks will have them ready for you. At the end of the day it's all about simplicity and that's what the Prolinks electric gear and brakes do for you.

If it is a drop in deal without having to do any cutting and fitting, I'm interested. Of course, now it's holding air for days on the door/brake side. LOL. I think we finally found the problem.

B.S.

You can purchase Century Jet electric retracts. The controller has a built in door sequencer along with landing lights. Here is a video of a set of B-29 retracts being tested. Then you can mix your brake valve with your elevator.
http://youtu.be/L4hwDj0_2BY

Good Luck.

If in your plane the doors keep open when the gear is in down position, you just can use a single channel without sequencer, only needed 2 electronic valves. Set a"servo slow down" function on the TX and connect both valves to this channel. Adjust the trip point of the valve that operate the doors at 10% of travel, and the trip point of the valve that operates the gear at 90% travel. By adjusting the time of servo movement onthe TX you can adjust the delay between the operation of the doors to the operation of gear.

Gaspar

Thanks Gaspar, I only have one model with an electronic valve & it's a simple unit set up without doors.

Are you saying you can program some valves themselves for trip points rather than using points in the
travel settings in the transmitter?

John.

I think it is to difficult with a Futaba 8FG.
I know you can change servo speed with motor mix, but it would have been more easy with the newer Futaba14SG