back on the build after hectic week at work. After pondering construction for the hatches i realised that i was placing them on the wrong side, need to be underneath not on top. this meant that the bearers are on the wrong side of the center line so i cut them out, new bearers will fixed to the top of stubs.

Also had to think of the motors required; to purchase the e-flite motors specified for these fans is a little over the budget i'm able to pay so new motors need to be sourced. This brought me to the next problem, motor shafts, as the adaptor is designed for 4mm shafts not the more common 3.17mm. After looking around i found a prop adaptor from OverLander in my local model shop which looked to be fine. On closer inspection the adaptor threads are the same, Overlander's being slightly longer, not an issue. Using my vernier calipers i measured the unthreaded shank, Edf adaptor measures 6.25mm and the lander part 6.35mm, 0.1mm difference. So my next thought is to mount the prop adaptor in a drill, spin it up and use wet n dry to take it down to 6.25mm.

awsome!

Okay, new bearers in place and one duct complete, one to go although won't take as long due to the paper templates produced with first. I used this software to create the rear cones so shouldn't cause any problems:

http://www.pulserate.com/

Yikes !! thats some crazy ducting

looks pretty good to me. ever seen the ducting on an MB339? not very EDF friendly at all. LOL.

Link ??

Originally Posted by domll

Pilot colours, now just need to find a 1/12 scale pilot..

Try looking at Jet Hangar Hobbies (www.jethangar.com) and their "Castle Five" pilot busts.
They have a "Sabre Jock" bust in 1/8 and 1/2 whose helmet looks very similar to the one in your post.
They are light, nice looking and inexpensive

(if I could figure out how to attach a photo, I'd insert one of my 1/8th Sabre jock......) I hope it attached......
Greg

k.smith459 - As LuvEvolution7 say's, many more complex ducts out there, although off set least its straight, would have been a lot more difficult with 'S' ducting.

Gdmoore - thanks for the link, now know were to get the pilot. I'll be doing the same as you have done with a partly sunken cockpit.

Small amount managed during the week: Rear duct cut out, soaked in warm water, rolled and held with rubber bands until dry, helps with de-tensioning ply making fitting easier. Also final fromer cut out and laminated to depron. One rear duct fitted at the moment. As i've run out of kicker, so has the shop until tomorrow, nothing much else yet done, so will collect supplies just in time to continue at weekend.

Ducting finally in place and started on the front section again. Side rails cut from 1/4inch balsa, need to decide if a floor is required before building up. Total airframe weight so far, 13oz.
Also started on the boons, again balsa LE added to help prevent damage and aid in keeping fins vertical. Next, add side crutches and formers. Before I can join these to the main fuselage I need also to get the elevator sorted.

Question: Not sure if to go with rudders, have heard that EDF's are better with but the original plans state these are not necessary... any thoughts?

Personally I build them to operate even if it says"not needed"If the thought is there now it's going to be there when you are flying.I did the same thing on a 162 ss,It gives you options.Easier to do it now than to retrofit.Just the weight to watch.
Stuart

this is a boomer.................go with rudders. you'll need them.

thanks guys, confirms what i was thinking.

LuEvolution - Im Intrigued, is it specific that a boomer needs rudder apposed to other EDF's?

it's all about those booms. I've only ever flown one boomer and it was really bad for adverse yaw, especially in turns. I'm not sure if this is a huge problem with all boomers, but I'de be willing to bet good money that it is. I'de go with rudders no matter what. if you should ever need them and don't have them, you'll wish you did.

I think what's going on, is that there's not a lot of side area with the small booms and the plane struggles to weathervane in turns and other maneuvers. for this reason, you get some skidding in turns and gravity will always play havoc with the plane when there's not a lot of side area to counteract gravity with aerodynamics. I think this could get worse for you if you ever get a situation with a cross wind final approach. I say go with rudders.

Rich

I think it's also important to point out that for a plane to be stable longitudally, there should be more side area towards the rear of the plane. with most planes, this isn't a problem since this is the way they are designed anyway. so, we get the advantage of the side area to help us in the yaw axis. with a boomer, there's more side area towards the nose, so it opposes stability in the yaw axis. I believe this explanation is more helpful aerodynamically speaking, which is why I'de add the rudders.