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Oct 30, 2018, 03:21 PM
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Nov 01, 2018, 05:58 PM
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Video of the Breitling Team L-39's I took last year in Huntington Beach.

Nice smooth maneuvers and good near unlimited verticals Hard to emulate in a model unless one has a powerful lightweight EDF setup.

Some pretty fast flybys too.

.

Breitling Jet Team Aero L-39's Tear Up the Sky at Airshow in Huntington Beach CA (9 min 0 sec)
Nov 03, 2018, 11:39 AM
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A picture of my battery placement with the lightweight inrunner FMS fan (289g) and the CG almost 1cm behind the manual value.

I have a YEP 150A esc in it, not sure how the weight of that one compares with any of the stock FW escs.

I've flown the L-39 with both RT 4500mAh and 5000mAh 35C packs, on mine no lead is required anywhere to get the CG right.



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Nov 03, 2018, 12:18 PM
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Quote:
Originally Posted by panamarenko
Hi Herb, it is a pleasure to meet you here too, along with the Bae Hawk, L-39 is one of my favorite planes.
I'm intrigued by this model/ livery, do you think it's better to wait for the ARF version? Any link to their website?. Thank you.
By the way, the L-39 is presumably going to be carried in Switzerland by Hebu :

http://www.hebu-shop.ch/index.php?ca...EPO-Jet-s.html

together with lots of other Freewing edfs ...
Nov 04, 2018, 07:46 PM
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L-39 always a pleasure to fly 80 degree weather and not one rain cloud in the forecast

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Nov 04, 2018, 09:12 PM
I love Corsairs!
Herb; I LOVE your color choices.
Nov 06, 2018, 11:58 AM
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Thanks ... the FW L-39 is a pleasure to fly, a very rugged lightweight everyday flier that tracks like a pattern plane
Nov 06, 2018, 04:59 PM
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A bit smaller than the F-4 Phantom but not by much,

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Nov 10, 2018, 12:43 PM
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The underwing tanks that come with the L-39 are very nice ... but they are quite big and thus draggy.

I decided to look around in my underwing tank drawer to see if I could find something a bit smaller and less draggy ...

.
Last edited by Herb; Nov 10, 2018 at 12:50 PM.
Nov 17, 2018, 06:25 PM
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..

I know you have the FMS 80mm v1, hot 2000 kv, draws around 105amp
The FMS 80mm v2, softer 2000kv, draws around 85amp.

And now you have the latest FMS 80mm , 1930kv.
I wonder what is the amp draw of it...
10 % less linearly, I guess it is around 78amp..
What amp draw do you have then ?

Thanks.
Nov 18, 2018, 12:16 PM
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Hi all the amp draws I measured in the FMS 80mm inrunner fan are given here:

https://www.rcgroups.com/forums/show...EDF-fan&pp=100
Nov 28, 2018, 05:36 AM
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I'm wondering, would the L39 be considered a good "trainer" jet, with it's more straight wing I would think it should be able to handle slower flight better than most of the other midsized wing jets
Nov 28, 2018, 11:26 AM
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Yes absolutely ! The straight wing makes for very docile flying characteristics.

All L-39's I have flown make excellent edf trainers ... more predictable and generally easier to land than a swept wing MiG-15, F-86 or Hawk for ex.
Nov 28, 2018, 11:35 AM
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By now there have been repeated (five to six) incidents of bad servos int the Freewing L-39 ...

For now they seem to cluster around the aileron and rudder servo, but that is most likely a coincidence.

https://www.rcgroups.com/forums/show...postcount=1983

http://www.rc-network.de/forum/showt...=1#post4682927

This could be some fault in the design, manufacturing or quality control in china, hard to tell at this stage.

The symptoms are usually :

* the servo does not center properly

* the servo does not return to center after power is switched off, and then on again

* the servo buzzes continuously

* in the course of exercising it, the servo locks up at full deflection

* the servo gets hot (hold a finger to it)

* the plane does not hold trim in flight

* to properly test the servo in question, isolate it from the blue box via say a y-connector

It is best to just replace the servo if any of the symptoms given above are detected, instead of hoping that the problem somehow might go away (poor understanding of electronics).

That IMO is the only safe way to proceed. After all, this is a 100mph+ edf jet so safety is a concern as well
Last edited by Herb; Nov 28, 2018 at 06:24 PM.
Nov 28, 2018, 11:42 AM
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Here is the standard way I test my servos in edf jets, using a simple servo tester:

https://www.banggood.com/Metal-Case-...r_warehouse=CN

https://hobbyking.com/en_us/turnigy-...___store=en_us

https://www.amazon.com/GT-Power-RC-S.../dp/B00C1BZZZQ


Here is an example as in my Freewing F-5E, the stock Freewing servos get exercised rather thoroughly (5 mins) before the maiden:


Testing Freewing servos (0 min 9 sec)


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