Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

fly king nitro planes webra 1.20 pusher

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Old 01-07-2010, 11:18 AM
  #1  
gadix
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Default fly king nitro planes webra 1.20 pusher

guys
i have posted this in jets section so i copy the link to here
please post your comments here
and not there.
thx
http://www.rcuniverse.com/forum/m_93...tm.htm#9395367




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Old 01-07-2010, 11:33 AM
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Default RE: fly king nitro planes webra 1.20 pusher

some more pics
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Old 01-13-2010, 06:21 PM
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Default RE: fly king nitro planes webra 1.20 pusher

fuel tank:
i have modified the fuel tank as the engine is at the rear of the aircraft and the tank must face the FW light direction,
so this is how it should be:

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Old 01-13-2010, 07:24 PM
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Default RE: fly king nitro planes webra 1.20 pusher

Hi Gadi,
It looks like a very nice plane, although i would be very careful with that build - you need to take all fuselage formers out and re-glue them with a proper glue (something stronger than the spit that was originally used).

you mentioned that you are planning on installing a 1.20 webra engine, what kind of prop are you using ? its a bit hard to find pusher props at these sizes...
there is a kit for webra that enables the engine to turn CCW (when looking from the back of the engine to the front), by replacing the main shaft to one with different timing - you will be able to turn it the other direction.

good luck.
Raviv.
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Old 01-14-2010, 03:08 AM
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Default RE: fly king nitro planes webra 1.20 pusher

shalom raviv

i know that i need to go over all wood structure with epoxy - the model was on the shelf for more than 2 years and the glue is still wet\sticky, i did most of that togather with fiber as well
you can the it here http://www.rcuniverse.com/forum/m_93...tm.htm#9395367

the webra CW shaft is about 200E, i;m still concedering this option - from budget POV

i will be using a 3-bnlade 13X8 master pusher prop
the webra is with a pump, 2.8HP with a 2300-15000 RPM


thx for looking and see you at latrun

gadix
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Old 03-14-2010, 10:28 AM
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Default RE: fly king nitro planes webra 1.20 pusher

ok, it has being a long time since i posted the status of the progress of my work, and now i'm just about to finish

the remaining issue to be done are:

Main retract steering setup - this is realy sucs as the pull pull hings and cables that i have made are not so relaible so i still need to modify it

CG - major issue - after reviwn this with matter here at RCU and on other forums the best CG location is 10.5"-10" from leading wing edge as the MANUAL IS WRONG!!!!

battery location: a 160gr LIPO 2650 mAh 40C - will be installed while setting up the CG


canoy:

is placed with 4 iiridum magnets and 2 samll velcro - just in case-> a very easy acsess to the HW



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Old 03-15-2010, 04:20 PM
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Default RE: fly king nitro planes webra 1.20 pusher

wing incidence:

while attaching the wings for the first time i j=have notice that they are not paralel to each other and not with the main center line

after more accurate check with TH laser guide incidence meter, RT wing is +1.5 degree whil ethe LT wing is -1 degree

to fix that i had to drill 4 oval holes on each side, cut and shorten the CF anti rotation tube, aline the wings in paralel to the horizontal stab, each side acordingly

i used 2 wooden plate for each side as the new back pltae with scre and CF exact hole , and a butterfly locking nut for easy install at the field


here are the reasults of this proceadure:

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Old 03-15-2010, 04:30 PM
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Default RE: fly king nitro planes webra 1.20 pusher

main and nose retracts:

all HW is spring air type with slimline scale jet wheels

had to reenforce the retact base as it is a weak point

the main gear is still an issue as i'm thinking of moving the FW wheel steering servo at the bootom of the fuse so it will be just inline with "T" of the pull pull cable system( not done yet)

the main gear is too low , this why the 6mm strut stick put from its place

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Old 03-15-2010, 04:33 PM
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Default RE: fly king nitro planes webra 1.20 pusher

RX and battery:


i use the 9CH ASSAN 2.4Ghz with a 2650 Mah 40C lipo, togather with a 15amp 6v regulator,by hobbyking

i will install the LiPo while doing the CG

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Old 03-15-2010, 04:35 PM
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Default RE: fly king nitro planes webra 1.20 pusher

some pics

hope to finish by this week and test flight at the weekend
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Old 03-15-2010, 07:36 PM
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Default RE: fly king nitro planes webra 1.20 pusher

Gadi,

She looks great and the build thread is good too !
Cant wait to see her finally airborne...
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Old 03-15-2010, 08:46 PM
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Default RE: fly king nitro planes webra 1.20 pusher

Gadi, your plane does look real hot! There are a lot of details underneath the surface.

I'll bet this is an exciting project, especially the first flights!
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Old 03-16-2010, 02:57 AM
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Amir Assal
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Default RE: fly king nitro planes webra 1.20 pusher

[sm=thumbs_up.gif]Gadi, your plane does look real nice [sm=shades_smile.gif]good luck
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Old 03-16-2010, 07:42 PM
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Default RE: fly king nitro planes webra 1.20 pusher

[:@]ok, it is 2:30 AM in israel and i'm after a 14 hours shift.. got home at 21:30 and untill now were in my garage doing the front wheel

due to the nature of the retract front wheel with a pull pull cable system,
i have decdided to move the steering servo to the lower side of the fuse, that way it is in line with the "T" horn on the strut and make it easier to adjust and relighable too

the 2 cables are hooked to a rubber band so while the gear is UP the cables are not loosen adn wont get cought with the mechanism...

CG will be on friday...hopefully and the test right after the CG setup togather with the LIPO install...

thx to I2DM ans amir for tips}

see the pics and the video clip as well

[youtube]http://www.youtube.com/watch?v=HrkAanO7XuA[/youtube]


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Old 03-16-2010, 08:14 PM
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Default RE: fly king nitro planes webra 1.20 pusher

Shalom Gadix
Lookin' pretty good , keep up the good work, I really like the looks of that plane, can't wait to hear about the maiden.[sm=thumbs_up.gif]
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Old 03-17-2010, 10:35 AM
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Default RE: fly king nitro planes webra 1.20 pusher

So do we have a maiden schedualed for Friday ?
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Old 03-17-2010, 10:40 AM
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Default RE: fly king nitro planes webra 1.20 pusher

Gadi...
Paint it camo and hang some ordinance under the wings!!! Just kidding, looks real fast just sitting on the bench! Post the maiden flight for us....
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Old 03-09-2011, 07:31 AM
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Default RE: fly king nitro planes webra 1.20 pusher

update
after 2 flights for testing, i have taxi crashed - that was last year!

howver i did manage to repair and i'm on the way to get it ready to fly again
please some videos from the flights and some pics from the latest paint job

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Old 03-09-2011, 08:06 AM
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Default RE: fly king nitro planes webra 1.20 pusher

Gadi,

She looks great - where are those flight videos ?
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Old 03-09-2011, 01:48 PM
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Default RE: fly king nitro planes webra 1.20 pusher

there you go

http://www.youtube.com/watch?v=gplPAlI5sz8

http://www.youtube.com/watch?v=B41MpABECK0

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Old 03-09-2011, 02:39 PM
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Default RE: fly king nitro planes webra 1.20 pusher

This is better:

[youtube]http://www.youtube.com/watch?v=B41MpABECK0[/youtube]
[youtube]http://www.youtube.com/watch?v=gplPAlI5sz8[/youtube]

That looks very fimilar ! cant wait to fly her again..
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Old 03-09-2011, 02:48 PM
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Default RE: fly king nitro planes webra 1.20 pusher

Nice!...but don't you have a db restriction over there? That baby is loud!!
I'll send you a nose gear that works!!!
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