Welcome back after the festive season break – trust you're all looking forward to a good flying year in 2015
Sorry this is taking as long as it is .... was supposed to be a 'quick & dirty' build - but things got in the way.
Anyway, back on track now I hope .......
Part 7
Finishing off the engine nacelles.
Cut some strips of foam board that are a 'snug' fit into the tops of the engine nacelles. See
Pictures23 & 24 for the before-and-after look.
Length is not critical, but make sure its clear of the motor outer as it turns. Glue in place.
Then cut bigger pieces to cap it off. These should be at least bevel edged, and sanded curved if you really want to but once the thing is flying you won't notice the difference.
Glue on top of the nacelle as in
Picture 25 , use a good amount of glue to make a strong structure.
Repeat for all four engines. This should give a reasonably strong finish to the engine pods and will handle the engine torque without breaking.
Apart from finishing the wiring that's the wing about done.
On the first one I built, I ran the power and servo wires inside the wing, but it was not that easy and I've elected to cheat a bit on this one.
There's a convenient step on the underside of the wing that is just big enough to hide the wiring.
So it's just possible to come out of the back of each nacelle and along the step to the next nacelle and eventually into the fuselage. I'll post a picture of the finished thing soon.
The PDF in
Picture 25 shows a couple of possible ways to wire up 4 motors. There are others I'm sure but to keep things simple I would go for one of these two options.
I did consider using two batteries (one left, one right) but the thought of one running out before the other was too worrying to think about. I might, however, be tempted to run two in parallel just to give a better flight time – 4 motors on a 2200mAH battery does not last long.
If you do go for the two channel approach ( throttle for one side & rudder for the other side with mix) then be careful how you mix them, in my haste to try out the idea I did a 100% mix- big mistake, when coming in to land, on a left hand turn, I needed more power so opened the throttle with full left rudder on and ended up with no power to the left engines & full power to the right ones. It only takes a second for the thing to 'flat spin' into the ground – very,very quickly :-( …. not enough time to realize what was going on and hence good bye to the front end of my first Lanc.
I'm sure extensions leads and 'Y' leads are all available to get the right connections, but its easy for me to do in-line solder joints and heatshrink over them.
Remember that only one of the ESC's should power the receiver, doesn't matter which one, and leave all the other 'Red' wires 'not-connected' as shown in the diagram.
That's all for now, time to start on the fuselage