korvette

it is simple...but you just have to know :-)

http://www.troybuiltmodels.com/ns/ma...ync_manual.pdf

Selector Switch Position 6:

This is the mode where the use and function of an Auxiliary channel (AUX CH) is defined.
The LEDs display the mode the device is in when in this programming mode.
The following table allows the user to determine what mode you are in:

Red Yellow Yellow
ON ON ON 1. AUX CH not USED – Glow plugs based on RPM
ON ON OFF 2. Independent Run Up Mode – Glow plugs based onRPM
ON OFF ON 3. AUX CH turns sync on and off – Glow plugs via RPM
ON OFF OFF4. Rudder steering of throttles – Glow plugs based on RPM
OFFON ON 5. AUX channel controls GLOW PLUGS (default)
OFF ON OFF 6. No dead stick detection w/AUX controlling glow plugs

You wil have mode 4...so the red led must be on, and the yellow leds must be off.
Just push the buttons until the leds are on the mode you want.

Good luck

bobo1121

Hi Guys

here is a link to my B26 Marauder with Twin syncI think I got it righthope to maiden by end of August


http://youtu.be/myns6vhKg7Q


Ron

yl5295

My Feedback: (1)

Guys.... Do not PM me on RCU... it never works... if you want to get in touch with me email me at [email protected]... I will not respond to anymore PMs on RCU

goodinmw

Followed the instructions and Twinsync worked flawlessly!

As stated in previous posts- key is setting everything up mechanically matching engine RPMs at both idle and max throttle as close as possible before engaging and setting twinsync.

First Flight- Ziroli P-38 with twin DA-60s turning 22-10 3 blade props, no engine bench time!

http://youtu.be/3iJgWHas64Q

Looking forrward to this weekend when I can retract the gear and open up the throttles past 1/2.

yl5295

My Feedback: (1)

Spark noise remedies:
1. Add more distance between RPM sensor wire and ignition, ignition battery, spark plug wire, plug boot, and engine case
2. Must have metal braid shielded plug wire and metal grounded spark plug boot
3. Copper foil tape wrapped arround the ignition, spark plug wire and boot grounded to ignition battery minus.
4. Coper foil tape wrapped arround RPM sensor wire grounded to Rx battery minus

[email protected]

Hello Bill,

I have just finished my ziroli p38 with the twinsync and i'm having some syncin issues. I have made a video so you can listen to the sound. It seems one engine is running higher rpm for a while than the other when moving the trottle. With the throttle at the same position the engines seem to sync. Could this be relatee to the timing you think? How can i adjust the timing with the selector in pos.4? Witch button to press? The engines are dle55 gassers and are individually tuned first and setup with the same mechanical linkages and normal multiplex karbonite servos. The engines seem to pick and sync up fine on the ground...

http://www.youtube.com/watch?v=vq9l-mGdG1I

Greetings Ronald.

[email protected]

Hello?? Somebody home???

korvette

Hallo ronald....

Bill heeft het al vaker hier neergezet....maar als je hem wilt bereiken...mail hem rechtstreeks...


<quote>
<qoute>Guys.... Do not PM me on RCU... it never works... if you want to get in touch with me email me at [email protected]I will not respond to anymore PMs on RCU<\quote>
</qoute>

[email protected]

Weet ik. Maar ik heb geen pm gestuurd. Ik heb het op dit support forum gezet. Geen reactie. Ook gemaild rechtstreeks... Geen reactie.

Robby

My Feedback: (18)

Direct inquires to Bill at: [email protected]

or to:
http://www.Downandlocked.com/

noworknguy

My Feedback: (197)

Can the Twin Syncronizer be used on motors with mags (Zenoahs). thank you don

p51tom

My Feedback: (1)

I am using a twinsync in my ESM 96" B25 with RCGF 20 cc Gas engines. It has been mentioned that setting up the engines prior to using the Twinsync is preferred. I have my twinnsync installed and would like know the procedure for running with the Twinsync off. Do I have to unhook the device and add a Y harness?
Thanks P51Tom

korvette

Take a look at the first reply on this page...

ON OFF ON 3. AUX CH turns sync on and off

Now you can turn the twin sync on or off with a switch on your transmitter.

I always use setting 2. .. ON ON OFF 2. Independent Run Up Mod
then you can operate the left engine, right engine...or sync them with a 3 way switch....works great,


good luck,

bigstew60

My Feedback: (35)

I have the twin sync on a hanger 9 twin otter with Os 70 4strokes. My last two fights, I have run into an issue that I can't figure out. First, on take off about five feet off the ground, both engines suddenly dropped to about half throttle. I was able to limp her back down but h d me puckered up for a minute. Yesterday the plane would do the same thing while trying to run it up. Sometime it would get to full throttle then back off. And others it would back off as soon as I would go past half throttle. The engines run fine when I disconnect the sensors. Has any one else had this problem or know what is causing it. Thanks.

dgiatr

i use twin sync in two of my birds ( esm bf 110 and esm tigercat) and i am very happy with that product.
sometimes i have the following problem :
(this happens only to my esm tigercat and never to my esm bf 110.)
when i set the throttle to any point below half throttle, twinsync doesnt sychronize the engines immediately (it seems to hezitate a little) and when it manages to do the synchronization then a few second later twin sync starts to reduce or to increase rpms on both engines all by it self( althougt i dont change my throttle setting, twin sync starts to reduce or increase engine rpms on both engines all alone!!)
please help!

[email protected]

I had some sync issues and have found that these issues will r3solve when you use the standard futaba servos f.e. the 3002 or 3004 on both throttles.

Maybe this will help.

kiwibandit

Hi all. It seems that no body is posting on this thread anymore. It has been over 1 year since the last posting. I hope there are people out there still using this piece of electronic wizardry.

I have just finished and flown my new ESM B-25. It has a pair of ASP 180 4c engines fitted that I have converted to spark ignition. It is still running on glow fuel NOT PETROL.

Back on page 35 (posting #853 & 854) there were 2 questions ask that never got replied to. I have read all 40 pages so I know this is a fact.

Anyway - My friend Stoat has now passed away so I can't ask if he ever got his problem sorted out.

Here is the issue.

You have your tx throttle set to a position (any position) let's say full power for an example.
Over the space of a minute or so - the twin sync slowly pulls the engines back in revs.
A slight movement of the tx throttle will immediately cause the engines to revert back to the full power setting only to creep back towards idle again.
For my first few flights I ended up flying this big bird like a sport plane. You know - mash the throttle in the turns and ease back on the straights.

I have tried all the different servo response settings. NON made the problem disappear. Most settings made it worse. The fastest response time had it back to the sync point in 15 seconds. The tx stick is still at max power position.

Before any one says, check your mechanical throws and tuning, let me add this.
I used the aux channel to be able to disengage the twin sync while airbourne. The model flew with superb manners and it was difficult to tell that the sync was actually turned off.

So - any helpful suggestions? In my own mind it appears to be a dead band issue. If the throttle of the slower engine does not advance slightly and the faster engine pulls back,
then the result will be an ever decaying throttle curve towards the point where the sync turns on/off. In my case - this is about 2500 revs.

The servos used for the throttle are Futaba 3004's I am going to swap them out for some that have much more torque to see if this changes the symptoms any.

I will post again once I have flown with other servos to let you know my findings.

Happy flying.

Regards from the Kiwi Bandit.

dgiatr

Hi Kiwi Bandit!
i have an ESM BF 110 and an ESM TIGERCAT which i dont fly very often , i could say, at about 10 or 12 times the year each one. i have twinsync on both of them. As far as ESM BF 110 , twin sync works fine!...as far as ESM TIGERCAT ,,i have the same problem as you! the only difference between them is that i have different servos. In my BF 110 i have hextronik 10k and in my TIGERCAT i have towerpro( if thats the correct brand name). that problem really makes the landings difficult because i cannot adjust my throttle where i want during approach and generally speaking TIGERCAT is a difficult heavy plane to fly. i have other projects going on thats why i havent changed servos yet in my TIGERCAT, which might be a possible solution to our problem. I am really intrested in your findings , please let me know as soon as you put the new servos..

Regards from dgiatr.

[email protected]

Hi Kiwi,

I have had something simular on My ziroli p38. On full throttle the engines would revert to idle. This was due to the fact that one engine was running lean. Test full throttle on each individual engine and see if each engine keeps running at full throttle if running alone.

Ronald

[email protected]

Oh forgot just use normal standaard futaba 3001 or 3002 servos. This made a huge difference in my situation with syncing

kiwibandit

Hi Ronald,
Thank you for your input. I am a small engine specialist by trade and tuning engines is in my blood. As I said in my earlier post - both engines run perfectly fine while in the air if I switch OFF the twin sync. Tuning is not the issue in this case.

Ps: A lean engine tends to run a little faster than a correctly tuned one. That is until it overheats and starts to sag.

kiwibandit

Thank you Dgiatr for your reply.

Very interesting about your two cases. As it turns out - the pair of servos that I have to swap out with my Futaba 3004's are Hextronic 12k. I think they are around the 10Kg/cm range in torque. I will let you know how I get on.

The Kiwi Bandit.

dgiatr

i really hope that changing servos will be the solution to our problem. let me know.

https://www.youtube.com/watch?v=YtpPh2o7DcY https://www.youtube.com/watch?v=UjqOE6T3sSQ

PeterF

Servo dead band, slop or stiction in the servo to throttle link or carburetor barrel may also cause this but you sound as though these latter points have been checked. I wonder if an engine that is always cycling revs a little could exacerbate this problem as the TwinSync may always be chasing its tail, and if dead band or hysteresis is involved it may make things go awry.

skubacb

On servos. The bottom line servo for me is the Hitec 5485. I use that on the throttle of all my aircraft. Why? Digital so the steps are smaller. Very reliable with the Karbonite gears. 89oz of torque. We even have that servo on the controls of a Top Flite Staggerwing with a 50cc gas engine. Would not use it with any gas engine plane with large control surfaces. But the small control surfaces of planes such as the Staggerwing do not put a sharp load on the gears.

One other item. Do you have the latest firmware version of TwinSync which was sold through TBM. Unfortunately, Down&locked told me there is no way to know which firmware version I have.
I was told that if I could sent in 3 units they would update them to the latest firmware at $75 each. If someone else wants to do this with me let me know. Only need one more unit to do this.

Is this causing the rollback problem. No idea since I do not know what the firmware update fixes. The only way I would think the engines would roll back is that one engine is low so it rolls back the high rpm engine. Then later it sees the other high and rolls back again.

Did you set the high, mid and low points in the Twinsync? Might do this if you haven't already.

Top Flite B-25 with two OS 4C 81ci engines. Had quite a difficult time getting Twinsync setup to run properly but works now. Also using the Twinsync onboard glow system with it.