RCU Forums - View Single Post - *Eletronic Engine Syncronizer *
View Single Post
Old 04-28-2006 | 12:56 AM
  #12  
2engsout
Senior Member
My Feedback: (2)
 
Joined: Feb 2003
Posts: 174
Likes: 0
Received 0 Likes on 0 Posts
From: omaha, NE,
Default RE: Eletronic engine syncronizer - no joke

I like the idea of having insurance in the air!! Twinman will agree with me on this one! I have been flying twins for 6 years now and currently have 6 twins RTF. Including a Ziroli P-38 and DC-3. If your unit will throttle back the engine still running within 1.5 seconds, (the quicker the better) after an engine failure, that will help keep the dead engine side from dropping its wing thru loss of lift because of the lack of prop blast over the engine nacell. The Cessna 310 for example, gets 13% of the total lift just from airflow over the nacell. I would switch to .07 speed heli rudder servos to reduce lag time, up or down. I think the remaining engine needs to have a preset throttle program to idle. (3000 RPMS) Here is why. With an engine failure, currently, all we have is seeing a wing drop. We cannot depend on hearing an engine dyeing because you have to figure there are ALWAYS going to be flyers that would rather fly there trainer than watch you fly your twin!!, so you aint gonna hear nothin! When the engine goes to idle, we will know instantly that the probability of an engine failure is HIGH, and we will excecute procedures accordingly! Meaning, push the nose down, bringing the throttle stick to idle, correcting with rudder, getting the wings level, and then bringing the power back up if necessary, to 1/4 throttle to stretch the glide. Very few RC aircraft will maintain altitude with only one engine running. We don't need any LED readouts. I have always used the heli program in my TX the fly all of my twins. The throttle ch for the left engine, and the pitch channel for the right engine. With hi resolution BB servos and NO SLOP or binding in the geometry, I tach the left eng at 1/4 throttle and then go to the pitch ch and adjust the % at 1/4 throttle stik position on the right engine and match the RPMS. Repeat for 1/2,3/4. I only have about 25% throttle at 1/2 stick so I can transition more softly at low power settings for adjusting my landing speed with more precision. The above procedures have worked well for me, but dose nothing for me when an engine dies. Thats where YOU yl5259 comes in!! I want insurance!!!! So do all the other twin flyers! You can send one to me and one to twinman for beta testing anytime. I had the Jomar unit and the lag time to sync was too slow for my taste and dose nothing to the remaining engine that is still running at full throttle. What do you other twin flyers think?