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Old Feb 28, 2012, 07:59 PM
chillax! It's only a Hobby
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.. not sure yet. I have a Neu 1515/1.5y (kv=1500) lying around unused

Other options - for me - would be motors in the 300-340g range suitable for the 90mm MidiFan (36mm can diameter) and with a kv in the 1500-1600 range.

That would then include Neu (1415 open endbells or 1515 with HET shroud), Arc, Leopard and similar (Tacon LPB 3674 open endbells or HK XK3674-B-xxxxkv open endbells), Mega, Tenshock, JePe EDF 8S setups, etc
Ya! i will use a HET Typhoon 700-68 1500kv in my CS fan runing 8s,
i like the leds i may do the same. Do you think the batt tray is strong for what we will be putting on them(8 or 9s),mine feels very soft!!
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Old Feb 28, 2012, 08:20 PM
chillax! It's only a Hobby
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United States, CA, Millbrae
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Installed the nosegear, fits nicely.

The steering servo has to be all the way forward. Some dremel work here and
there to make the wheel and steering (tiller) arm fit.

.
you didn't put any carbon in the nosegear area?
is that area strong? are you going to use a small 9g MG servo up front?
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Old Feb 28, 2012, 08:31 PM
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Ya! i will use a HET Typhoon 700-68 1500kv in my CS fan runing 8s, I like the leds I may do the same. Do you think the batt tray is strong for what we will be putting on them(8 or 9s), mine feels very soft!!
I like the led's but they are a pain. Making all that wiring longer, drilling holes that chip the gelcoat, gluing those led's straight ...

I think this airframe (wing) will max out at ca. 2500W ... the wing is just not made for anything past that, me thinks.

8S 3000's should be fine on that tray, more weight might cause problems. But by then the mains will pop out from the wing top

.
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Old Feb 28, 2012, 08:35 PM
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You didn't put any carbon in the nosegear area?
is that area strong? are you going to use a small 9g MG servo up front?
No carbon yet, but I just started. Looks strong enough, I land on the mains first.

The thing with the nosegear is that anything there is easy to work on and fix, in the wings it's a) harder to fix and b) might punch through the top skin.

Yes, MG servo definitely for steering. It has to be small to fit there, maybe just one of those TGY mg90s.

http://www.hobbyking.com/hobbyking/s...idProduct=9392

These are in fact the servos that CMP suggests in the instructions ! I have no experience with them, but they might be decent for this job.
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Old Feb 29, 2012, 12:21 PM
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Two inexpensive ($4) parkzone pilots, the cockpit tub will be made removable (to save weight).

http://www.amazon.com/ParkZone-Pilot-T-28/dp/B001QU3UQO

.
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Old Feb 29, 2012, 01:36 PM
chillax! It's only a Hobby
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Two inexpensive ($4) parkzone pilots, the cockpit tub will be made removable (to save weight).

http://www.amazon.com/ParkZone-Pilot-T-28/dp/B001QU3UQO

.
yes,just order 2 of them! thanks.
i have lots of 3300-4000 4s that i'll use on it!
i got many of the 9g MG servos from HK,they have worked well for me!
so, i am going to use carbon rods for all controls but the flaps.any input on that?
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Old Feb 29, 2012, 08:22 PM
chillax! It's only a Hobby
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so,i don't think i will be doing the LEDs
the CS fan will have to do for now, i am saving the Stumax for my 90mm Viper Jet from HK
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Old Mar 01, 2012, 12:33 PM
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Trial fit (width) of a 9S 3000 pack ...
.
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Old Mar 01, 2012, 12:35 PM
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Now working on the ducting ... things seem to fit pretty well here too, don't anticipate any problems yet. Seem easier than the T-45, less cursing.

I trial fitted the ducts with the fan shroud to make sure everything is aligned properly.

The intakes seem to fit ok too, a lot of the ducting will be glued in with PU glue (gorilla glue) : very strong, a lot lighter than epoxy, filling and easily sandable. But be careful as it can expand like crazy sometimes.

.
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Old Mar 01, 2012, 12:40 PM
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Trial fit of the ducting (light and well made btw).

Good ducting is necessary (and crucial) for decent EDF performance.

.
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Old Mar 01, 2012, 07:34 PM
chillax! It's only a Hobby
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Now working on the ducting ... things seem to fit pretty well here too, don't anticipate any problems yet. Seem easier than the T-45, less cursing.

I trial fitted the ducts with the fan shroud to make sure everything is aligned properly.

The intakes seem to fit ok too, a lot of the ducting will be glued in with PU glue (gorilla glue) : very strong, a lot lighter than epoxy, filling and easily sandable. But be careful as it can expand like crazy sometimes.

.
are you going to use the reg. or white PU glue?
my ducting looks as good as yours,look like they got it down
i put the 9g HK servos on my ailerons,some bluebird MG servos i have laying around on the flaps,and the same 9g HK servos for the other areas in the back of the plane, did you use a MG 9g for the rudder? or larger?
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Old Mar 02, 2012, 02:08 AM
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No, not the light colored one, that one is no good for some reason. The old brown colored one.

For the rudder servo the space is very limited. Either a very small one, or a low profile one, maybe.
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Old Mar 02, 2012, 11:39 AM
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Oversized pilots with large bloated heads look a bit silly in the L-39 ... Here's a picture of what the original, more or less, looks like:

.
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Old Mar 02, 2012, 11:42 AM
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Spackling and filling of various gaps with water-based interior lightweight spackle compound (red devil or similar, from the local hardware store i.e. ace, lowes or home depot).

.
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Old Mar 02, 2012, 11:44 AM
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The fan mount needed some additional glue here and there

Other than that, most seem to fit well, but some major shortening of the ducts will be needed.

.
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