RE: Eletronic engine syncronizer - no joke  
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All Forums >> RC Airplanes >> Twin & Multi Engine RC Aircraft >> RE: Eletronic engine syncronizer - no joke
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RE: Eletronic engine syncronizer - no joke - 5/8/2006 3:11:34 AM   
roltech


 

Posts: 599
Joined: 9/6/2004
From: Wpg, MB, CANADA
Status: offline 		I also will take two.

roltech

(in reply to yl5295)
       Post #: 51

RE: Eletronic engine syncronizer - no joke - 5/28/2006 12:32:35 PM   
fockewulf37


 

Posts: 1227
Joined: 3/19/2002
From: kannapolis, NC, USA
Status: offline 		yl5295,
Did any more info on this system? I have about 3 twins I am looking for a system just like this!!!

Ty

(in reply to yl5295)
       Post #: 52

RE: Eletronic engine syncronizer - no joke - 5/28/2006 1:51:53 PM   
yl5295


 

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline 		What kind of info are you looking for? I have not written up the instructions yet. I have been at the beach the last two weeks on vacation so I have not gotten to work on it the last two weeks. I built a couple more prototype units and the PCB are back waiting for me at my house. The latest prototypes remove the LED RPM display and just have some simple flashing leds. Once I test these I am going to order the first production units. Probably 2-3 weeks at this point. I will be getting back to everyone on this thread after final testing. I have tested the independant run up mode, rudder steering mode, normal sync mode, sync enable/disable mode, and dead stick scenarios and everything is working great at this point. So the final thing I am finishing up now are the programming steps to set the programmable idle, kill position (PCM like loss of tx signal), full throttle end point and operation mode. Most people will not have to change the programming in it but the option of changing programming parameters need to be there.

(in reply to fockewulf37)
       Post #: 53

RE: Eletronic engine syncronizer - no joke - 6/1/2006 4:35:17 PM   
fastpat


 

Posts: 32
Joined: 5/4/2006
From: Travelers Rest, SC, USA
Status: offline 		Put me down for two as well. Looking forward to your test results.

Pat

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Pat

(in reply to yl5295)
       Post #: 54

RE: Eletronic engine syncronizer - no joke - 6/1/2006 5:00:20 PM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		yl5295:

I'm ready to send money whenever you want. Send me your phone number by PM or email, we an talk about it.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to fastpat)
       Post #: 55

RE: Eletronic engine syncronizer - no joke - 6/2/2006 12:45:15 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		Wonder how this would work on a four engine bomber. During the testing of the Cedar prototype B-17, on the vertical test (THANK GOD) one of the outer engines flammed out. The yaw from such outboard engines was tremendous. So far, I have not seen an in air flame out...Verical test three times per flight..others tell me engine out on B-17 not big deal..but wonder this application.Mmmm
Twinman

(in reply to William Robison)
       Post #: 56

RE: Eletronic engine syncronizer - no joke - 6/3/2006 9:32:41 PM   
yl5295


 

Posts: 462
Joined: 7/29/2003
From: Raleigh, NC
Status: offline 		A couple of updates:

I am sending one of the (3) prototypes I have to William Robinson this week for more feedback.

As for a B17. I can study the circuit to see if I can pack four engine/servo controllers into one but when I looked at it in the past it would not fit. I have simplified the logic alot since then however. I could add a high speed serial interface to connect two together to sync four engines but that would be a next winter project for me. Not enough B17s out there to justify doing it short term. (but if someone wants to give me a B17, I will do it right away!!! :0)

(in reply to twinman)
       Post #: 57

RE: Eletronic engine syncronizer - no joke - 6/4/2006 1:32:59 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		As for bringing you a B-17..uh..the Cedar Prototype is in Texas and I am out of the country right now..Let me have a rain check on that one. With Cedar arf, maybe more coming. I saw a video of a B-29 in England that lost three engines and landed in a tree...uh...did I mention that the engines were 100cc gas and the plane was over 400#. Now that is twin sanity as Bill would say.
Twinman

(in reply to yl5295)
       Post #: 58

RE: Eletronic engine syncronizer - no joke - 6/4/2006 1:39:50 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Twinman:

Please eliminate that spce between the ":N" and the "S" if you would. Having a space before "Sanity" makes it look like there's something reasonable about playing with twins and multis. And we all know better.

Haw.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to twinman)
       Post #: 59

RE: Eletronic engine syncronizer - no joke - 6/4/2006 1:51:00 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		WELL EXCUSE ME!! Tee Hee Some guys pin an idea and get defensive..Ha Ha
The possibilities to drive yl5295 crazy boggle the mind..Ford Trimotor..Huges Spruce Goose..Tri Stick...Five engine kadett!!. What about Dornier 335? It just get's better........and if it works, as Bill will now certify to the world ( No pressure Bill) mulit's could become far more common.
Twinman

(in reply to William Robison)
       Post #: 60

RE: Eletronic engine syncronizer - no joke - 6/4/2006 10:51:24 PM   
Parkerm



Posts: 157
Joined: 6/5/2002
From: Carlsbad, NM, USA
Status: offline 		Stumbled on to this thread, and just finished my first twin, a G&P PBY, I am planning to do a land based twin next. I need some insurance.

I want two of these also. I think the market is ripe. A lot of people talking or planning twin projects that have never done it before (like me).


_____________________________

RM Parker
AMA 681735

(in reply to twinman)
       Post #: 61

RE: Eletronic engine syncronizer - no joke - 6/4/2006 10:57:09 PM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Parker:

The most important thing, the most basic thing about flying multi engines is absolute reliability of the engines. No matter how great any engine control device may be, it will do you no good at all if your engines don't run. Worry about that first.

One of these devices wont hurt you though, and by chopping the running throtle could save you.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to Parkerm)
       Post #: 62

RE: Eletronic engine syncronizer - no joke - 6/5/2006 12:42:56 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		William,
Can I add one more small item...here comes the soap box.... Learn to use and Always ALWAYS fly with the rudder. Engine out, even with the great idea of this syncronizer, will still result in a crash if you cannot input rudder control while trying to get back to the field. This will save the unexpected snap roll for engine out, but you still must fly back to the field. Yes, twins WILL fly on one engine, but it is up to the pilot to do so and the rudder use is the most important point at that moment and you cannot learn instantly in a panic.
OK OK,,I am off the soap box!!! Been There done that........DON'T.
Twinman

(in reply to William Robison)
       Post #: 63

RE: Eletronic engine syncronizer - no joke - 6/5/2006 3:54:46 AM   
Terror Dactyl



Posts: 391
Joined: 4/9/2002
From: Jurrasic Park, TX,
Status: offline 		There was some wise advice that a long time twin flyer (even longer timer than Twinman) gave me and also on more than one occasion flew some very large and borderline powerd flights with great success:

1 you tune the first motor to peak on the ground and then back the needle one or two clicks (200-300RPM) and then you shut the motor off.

2 You start the next motor and do the same tuning.

3 You start the first motor again.

4 It is okay to do the nose in the air test if the plane is not too big or heavy to accomplish, BUT YOU DO NOT CHANGE THE NEEDLES TO MAKE THE ENGINES SOUND MORE IN SYNC AS YOU HAVE ALREADY GOTTEN THEM TO RUN AT THIER BEST AND ALLOWED FOR THE UNLOADOMNG IN THE AIR. SYNCING THE MOTORS WILL PUT ONE OF THEM IN A RICH OR LEAN SIDE OF BEST TUNE

< Message edited by Terror Dactyl -- 6/5/2006 3:58:13 AM >


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Take care and dodge me later. Jim

(in reply to twinman)
       Post #: 64

RE: Eletronic engine syncronizer - no joke - 6/5/2006 5:05:37 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Terror Dactyl:

As always, good advice from you.

Twinman:

George, yours also is always good. And without using the rudder the remaining engine will just get him to the crash that much faster. How about posting a link to your “Twins Primer” on Paul Grubich’s web site for him? Much good there.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to Terror Dactyl)
       Post #: 65

RE: Eletronic engine syncronizer - no joke - 6/5/2006 5:14:52 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Parker:

I’ll also add that the Catalina is about the easiest combat twin to fly with an engine out. The close engine spacing and the long wing span combine to minimize the adverse yaw when one goes dead. It would be hard to pick a better first twin from the selection of military aircraft.

However, do bear in mind that “…easiest combat twin to fly with an engine out…” is still a relative statement.

If you have G2 or G3 get as much (simulated) stick time as you can with the B-25 and P-38 and programmed unexpected engine failures. That will be cheap insurance too.

Yes, there are other simulators, but “Real Flight” is the one I’m familiar with.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to William Robison)
       Post #: 66

RE: Eletronic engine syncronizer - no joke - 6/5/2006 12:40:00 PM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		Bill,
Am humbled in your presence.
I would love to do the link, but I am overseas right now and cannot access RCWARBIRDS.com...What is that all about?? rcu, no problem. Others can go to Rcwarbirds.com. I think is in the technique section.
Twinman

Terror..Yes, as always you are correct in the tuning...but if you have computer radio and smart ass kid to program it..you can "Blend" the engines together using exponential or helicopter settings to match the engines..Yes, I know the KISS program...but, hey, this is the twins forum..Twinsanity rules!!

(in reply to William Robison)