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Old Oct 04, 2012, 01:50 PM
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ok thanks gents. so the optimum cg is 130mm from the te of the wing? just re read the whole thread again up to this last page and the general consensus seems to be around 130mm. but then again some people are saying slightly nose heavy is best (which applies to most planes as far as im aware) and others are saying slightly tail heavy while others are saying balance it neutral... confused!!!!

with where i have it now,its pretty much neutral,(maybe ever so slightly bias nose down when it comes to rest on my cg rig) and i figured with a straight hard throw at full throttle this would be best?
the maiden should happen tomorrow,the first bit of even nearly reasonable weather for 3 weeks over here,but there is forecast about a 7mph breeze.
want this maiden to be a success so bad you would not believe it so need a definitive answer to the best cg from you fella's that own and have flown this bird already. thanks!
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Old Oct 04, 2012, 08:14 PM
The Need4Speed
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Malaysia, Perak, Ipoh
Joined Aug 2008
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It must be the way I like to fly

As I've described in the way I fly...

" I normally fly at half throttle with constant elevator input (to keep the nose up) then when I go WOT on the dive for the Low Pass, my elevator is in neutral position."

I guess at full throttle the lift generated reduces the need for any up elevator input thus I can do my low fly-by pretty much straight and level. (no sure if this makes sense or not )
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Old Oct 06, 2012, 10:47 AM
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Quote:
Originally Posted by mrmurder1975 View Post
.
.
general consensus seems to be around 130mm. but then again some people are saying slightly nose heavy is best .
.
.
According to the "experts" see http://www.rcgroups.com/forums/showthread.php?t=1305906

the CG should be pretty exact on EDF models. That's why I decided to
select the aftmost CG.
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Old Oct 07, 2012, 05:23 PM
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ok so the maiden didn't go so well. think i prob made a typical edf newb mistake...
soon as i hit full throttle i chucked it....and now i have just found out that the fan takes a couple of seconds to reach full speed,so i was launching underpowered....oops.
damage report: nose cone split and wing snapped off :0( not the result i was looking for.
anyway, fixed the wing but there is nothing i can do with the nose cone,and it spoils the whole look of the jet as is.

are there still spares available for this bird? pref in the uk,but im willing to order from anywhere as long as i get one (or maybe 2 or 3,just in case).

i have also balanced it at 130mm and slightly tail heavy and i plan on launching it at a higher angle next time,just to try and put as much distance between it and the ground as possible,trying to give it time to pick up some speed. hopefully that will work.

in the meantime,i really need a nose cone if anyone can point me in the right direction please
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Old Oct 07, 2012, 08:38 PM
The Need4Speed
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Joined Aug 2008
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Too bad about the maiden.

This jet does not have 1:1 power to weight ratio. It will not fly away by itself. It needs a good throw. If I recall correctly, Floey's jet has a cheater hole cut into the airframe, giving it more thrust than normal. In my case, I moved my CG further forward, giving mine a heavier front end. Which helps when I throw the jet. The heavier front will assist in pulling the jet forward until it picks up speed. Only setback is the constant need to maintain the elevator control.

Go view this thread on Hand Launching.

http://hdflyer.com/how-to-hand-launching-rc-models/

And this was the place I found my spare airframe.

http://www.hobbyking.com/hobbyking/s...dProduct=14346

But I just went to double check the link and it is not there anymore. You may have to try browsing thru their list of kits. They may have changed the part no.

Just hope it's still in stock.

Just in case, you cant find a replacement, an appropriately sized prop spinner is a good substitute.
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Old Oct 08, 2012, 06:53 AM
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Quote:
Originally Posted by fooyukvoon View Post
Too bad about the maiden.

This jet does not have 1:1 power to weight ratio. It will not fly away by itself. It needs a good throw. If I recall correctly, Floey's jet has a cheater hole cut into the airframe, giving it more thrust than normal. In my case, I moved my CG further forward, giving mine a heavier front end. Which helps when I throw the jet. The heavier front will assist in pulling the jet forward until it picks up speed. Only setback is the constant need to maintain the elevator control.

Go view this thread on Hand Launching.

http://hdflyer.com/how-to-hand-launching-rc-models/

And this was the place I found my spare airframe.

http://www.hobbyking.com/hobbyking/s...dProduct=14346

But I just went to double check the link and it is not there anymore. You may have to try browsing thru their list of kits. They may have changed the part no.

Just hope it's still in stock.

Just in case, you cant find a replacement, an appropriately sized prop spinner is a good substitute.

ok thanks mate. that video was handy too,a few tips n tricks there which should help me out on my next attempt. didnt think to check hk for f16 parts,will go have a look now and see what i can find.
so would you recommend i go a little nose heavy @130mm for my next attempt? i would like the tail drag when low and slow like the real ones,but am willing to give that up if a little nose heavy will help with the launch. or should i just play safe and go neutral at 130 or ?

anyway,thanks for your help. i do appreciate the help and advice.

**cant find any parts on hk that look like they might be suitable for this plane. not good!!**
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Old Oct 08, 2012, 08:19 AM
The Need4Speed
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Just remembered the spare kit came with a set of stickers. The website listed is www.elerc.com

For your next attempt, look for tall grass. Should cushion the landing.
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Old Oct 08, 2012, 08:46 AM
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Quote:
Originally Posted by mrmurder1975 View Post
ok so the maiden didn't go so well. t
.
.

hit full throttle i chucked it....and now i have just found out that the fan takes a couple of seconds to reach full speed,so i was launching underpowered....oops.
.
.
1. Don't worry about the nose cone until You got the setup / trim right.

2. Fan take couple of seconds ... means unbalanced fan. It's tricky to
balance these fans (wait with that until You got some spare ones ...)

3. Lipo must also have at least 20Celsius degrees or more to actually
perform properly so run the fan a bit until You feel the LiPo is luke warm.
(Should be recently charged and do not keep it charged over time
performance deteriorate quickly if You do, I've tried ...)

4. If You run stock setup You need a very good launch and a perfect setup
to be able to take off most likely (I never bothered to try). Cut cheater hole
nobody will notice it in the air. I cut a 50mm close to the fan to get access
to ESC connections and easy check/replacement of fan.

5. Replace stock ESC with a 25A or 30A supporting 4S and use a proper
LiPo a good quality 850mah 35C should do (short flight time). If You
decide to do this mod do cheater hole. The stock inlet is far too small
for this hot setup.

I fried recently the fan motor on my F-16 ... during testing of LiPo's forgot
to watch motor temp. So with 4S be careful You can't fly full throttle for
ever. With 4S the Kyosho F-16 realy become a true EDF. With 3S this
F-16 is slow and underpowered, "flying like a dog" ... if I remember correctly.
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Old Mar 23, 2014, 05:40 PM
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Hi can someone please message me the settings for a DX7S for this jet?
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Old Mar 24, 2014, 05:09 AM
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Quote:
Originally Posted by nofxnz View Post
Hi can someone please message me the settings for a DX7S for this jet?
This reviewer may be able to help You ...
http://www.rcgroups.com/forums/showthread.php?t=866346
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Old Mar 25, 2014, 12:31 AM
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Thanks very much FLOEY

Which wing type do I choose?



Which servo connection do I use?

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Old Mar 25, 2014, 02:55 AM
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Quote:
Originally Posted by nofxnz View Post
Thanks very much FLOEY

Which wing type do I choose?
Try Elevon it should work.

Elevator Up/down 7mm
Aileron Up/Down 10mm

See Kyosho user manual page 11

Note: I found neutral CG a bit aft of 135mm ... I believe. Be careful I damaged
the nose first and second flight because of this ...

BTW: The best flying Kyosho jet is the F-4 Phantom but it need some reinforcement
and modifications. The F-16 don't need such except for a cheater hole for easy take off.
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Old Mar 25, 2014, 03:56 AM
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Thanks FLOEY!

So would I choose Elevon for servo control as well?

Cool I am going to buy a F-4 Phantom now then! can you please message me what mods I will need to do to it.
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Old Mar 25, 2014, 04:34 PM
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Quote:
Originally Posted by nofxnz View Post
.
.
So would I choose Elevon for servo control as well?
.
.
Can't help You more specific, I suggest try ...

What I do on my Hitec Optic Sport / FrSky (left stick throttle ch.3,
right stick elevator ch.2 and ailerons ch. 1).

When You choose Elevon on the TX both ch.1 and 2 are used for elevator
and aileron in combination. It's a bit odd I know ... but it works.

I'm not familiar with Spektrum programming.

(Reread some of my old post I had CG at 130mm from aft egde of wing)

The weather has turned nice now may be I will fly my F-16 in the weekend
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