and a few more

With the drop tanks on for show, and the retracts up.

The droptanks are - maybe - a nice protection for the wings if the retracts fail

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nice looking model and good price for a composite 90mm edf model

Polyester resin fuselage, balsa built up wing ...

"composite" sounds good at first but is only half of the story, literally

Fitting the fan and ducting requires some patience.

First the fan mount got some extra epoxy (hysol) here and there ...

It's not that it is not strong enough. I am more worried about rigidity and later getting some rather annoying resonances and vibrations . A rather acute problem with FG fuselages, that tend to act like resonating violin cases.

My fan housing is a bit bigger than the ducting adapter supplied by CMP.

So the front piece had to be cut (as in the Hawk / T-45), and the back piece had to be cut, shortened and re-glued together.

The motor wires have to come out the side, otherwise they won't fit later under the belly fan hatch.

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Almost finished with the fan installation ... quite a bit of duct tape and a few zip-ties still need to be added.

Even the fan hatch can be made to fit, eventually.

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Retract and flaps operation video added :

CMP L-39 Flaps (0 min 17 sec)

CMP L-39 retracts (0 min 19 sec)

All closed up and ready for the maiden this weekend

That bottom fan hatch was a bitch to get in place, I used silicone, a long adjustable clamp, and four of the supplied wood screws to get it to conform - eventually - to the fuse shape.

The 120A HV opto esc is up in the front, with a small fan on top of it. Would have been impossible to get the CG with an ESC in the tail ...

Receiver battery is a 4-cell 2000 mAh Sanyo Eneloop pack.

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Cool can`t wait for fly reports maybe video .

Good luck Herb!!
i still have a little more to go on mine

Originally Posted by Herb

Retract and flaps operation video added :

http://www.youtube.com/watch?v=ylsKQBUjF4Q

http://www.youtube.com/watch?v=VONr90vjHlw

your flap runs down Very slow? is that the norm on all your setup?
i always have mine on two settings, slow but not as slow as yours
i see also the inlet on the fan is not line up! Just like mine! is that OK?

Yes the flaps move pretty slowly in the video ... maybe not critical ?

If there are no pitch changes, you can drop them slow or fast ... If there are some pitch changes it helps to slow them down a bit ... I have it kind of scale, I find it cool. You can adjust the speed of course to your liking.

I usually put the flaps down on the last downwind leg. I prefer a slower gradual flap drop and, yes that's what I have sometimes (Hawk is same way). On the Me-262 there's no delay though.

Yes that fan inlet setup is not that great, but should be ok I think. No, it's definitely not perfect. I am still studying the thrust angle issue a bit.

It took me some work to get that fan hatch to conform to the fuse, I used silicone, hope it sticks for a while

Here's the Nitroplanes version / scheme of the CMP L-39 :

http://www.nitroplanes.com/cmp-cp09-090-kit.html

The HK one is due out any time I suppose ...

I kind of like the yellow wing tanks
helps to keep track of it in the air with my old eyes

Originally Posted by Herb

Yes the flaps move pretty slowly in the video ... maybe not critical ?

If there are no pitch changes, you can drop them slow or fast ... If there are some pitch changes it helps to slow them down a bit ... I have it kind of scale, I find it cool. You can adjust the speed of course to your liking.

I usually put the flaps down on the last downwind leg. I prefer a slower gradual flap drop and, yes that's what I have sometimes (Hawk is same way). On the Me-262 there's no delay though.

Yes that fan inlet setup is not that great, but should be ok I think. No, it's definitely not perfect. I am still studying the thrust angle issue a bit.

It took me some work to get that fan hatch to conform to the fuse, I used silicone, hope it sticks for a while

Imo as long the airflow is smooth inside the tubs, it should be fine
A lots of edf jets have all kinds of bends with their intakes!
where did you endup putting the ESC and Rx?