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« on: October 11, 2012, 02:17:28 PM »
arun.sreelakam
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So its time to update my new plane made up of coro 2mm
i am arun from kerala(palakkad). i started this hobby more than 4 years ago and now only took it as so serious and making a plane was my dream and few months back i managed to build one and it crashed due to lack of experience and some tech probs..
then i decided to build a trainer for better trainer as a beginner.
wait for the picture of the trainer plane...

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Home made coro trainer plane 50" span
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« Reply #1 on: October 11, 2012, 03:14:43 PM »
arun.sreelakam
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not yet flyed yet waiting for a landing gear idea..
and also the motor is quite fast so dunno which prop to use... suggetions are welcome.. ashta sir asked me to use a 4.5x4.5 prop for this with 3s battery.. currently i am usind 5x5E not havin 4.5x4.5..
Sad
materials
2mm coro
hot glue
thermocol
turnigy 2826-6 2200kv motor
3 9gm servo
6ch receiver
2200mah 3s 35c lipo
auw not yet scaled.. may be about 700gms approx..
some more pics

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Re: Home made coro trainer plane 50" span
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« Reply #2 on: October 11, 2012, 03:49:48 PM »
vineet
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using  much high kv motor this will be out of sight too early
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« Reply #3 on: October 11, 2012, 04:04:30 PM »
manojswizera
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Arun you should use 1000 to 1500 kv motor with 8 or 7 inch prop. To start with your first plane..
good luck for ur first flight  Thumbs Up
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« Reply #4 on: October 11, 2012, 05:04:00 PM »
arun.sreelakam
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currently i have orderd a 1200KV motor and not rchd my hands yet thats y using this 2200Kv and smaller prop..
so need to wait until the motor come right..?
thanks for your help.
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« Reply #5 on: October 11, 2012, 05:08:15 PM »
manojswizera
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Yes it will be better if u wait for ur motor.
Your first flight should not be hurry  Smiley
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« Reply #6 on: October 11, 2012, 05:14:52 PM »
arun.sreelakam
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ok then i will wait for the motor..
also now i know the reason why my first plane crashed... Bang Head Bang Head Bang Head Bang Head  Angry
dont want to repeat it again..
thanks swizera
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« Reply #7 on: October 11, 2012, 10:37:49 PM »
vineet
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the reason why the bignr buddies fail for there first flight due to lack of knowledge , i think wait for the right electronics would be more far good than the crash and making the model again
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« Reply #8 on: October 11, 2012, 11:07:37 PM »
hangingtough
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Another thing,

Your battery is too ooo big, I recommend a smaller size to start with.

This will make your plane go slow and easy to handle

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« Reply #9 on: October 12, 2012, 08:34:37 AM »
arun.sreelakam
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@ hangingtough: battery is too big means the size or the power?
 i am having a 900mah 3s 20c lipo also.. should i use that..
or need to go for 2s?
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« Reply #10 on: October 12, 2012, 08:38:21 AM »
arun.sreelakam
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you are right vineet, crash in the first flight will make disappoinment to all bgners.. now will wait until everything gets fine and then only going to fly.. Bow
will post pics and information after the changes.. Smiley Thumbs Up
what about the battery dude as hangingtough suggested? Head Scratching
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« Reply #11 on: October 12, 2012, 11:13:50 AM »
manojswizera
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@ hangingtough: battery is too big means the size or the power?
 
I think SIZE. if u have 3s in smaller capacity u can go for that also(to reduce the ALW of ur plane . other wise your 2200 , will also be fine enough.
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« Reply #12 on: October 12, 2012, 11:42:29 AM »
hangingtough
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No the weight of 2200 is about 70g more than a 1000, at entry level it makes a huge difference

Setup is already very typical.
High kv motor .

So He should be careful in selecting the other items
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« Reply #13 on: October 12, 2012, 12:38:36 PM »
arun.sreelakam
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no dude i am gonna change the motor to a 1200kv one with a 9x5 prop..
also if needed having a 900mah 3s also... so it wil be fine i think.. i can sacrifise in the flying time for my first flights... after that will go for 2200 mah... Thumbs Up
fine?     Smiley
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« Reply #14 on: October 12, 2012, 06:10:05 PM »
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Where is your battery located? If it is not right on the cg, you must move the lighter battery close to the nose to maintain the cg at 33% of the chord from the leading edge of the wings. CG is the single most crucial thing to look out for. Also make sure that you battery can handle the motor. Your 2200kv motor will kill the 900mAh battery at full throttle Tongue
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That form ever follows function. This is the law.
 

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« Reply #15 on: October 13, 2012, 08:36:53 AM »
arun.sreelakam
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battery is under the wings bottom side... also i am going to change the motor to 1200kv emax... as juggested above.. and 900mah for first time and later will try to move on to 2200mah...
 Roll Eyes
is it oky? Head Scratching
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« Reply #16 on: October 13, 2012, 11:47:41 AM »
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go ahead and make your day.  Clap Clap Clap

We shall feel proud of even helping 1% in making this thing fly
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« Reply #17 on: October 21, 2012, 04:14:38 PM »
arun.sreelakam
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motor changed to emax 2822
1047 prop.. landing gear..
and lipo 900 mah 3s 20c
ready to fly now.. soon after 24th this month
AUW about 700gms
will upload the pic soon...
if need any more change pls post
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« Reply #18 on: October 31, 2012, 11:33:22 AM »
arun.sreelakam
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finished with my plane and going to maiden it this week may be on sunday.. will upload the vid...
so heres my final pics cg at about 30% under the wings.. battery now 900 3s lipo
2822 1200kv motor
1047 SF prop..
weight about 500gms nw..
sorry for the poor quality pics..  Sad Sad


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Re: Home made coro trainer plane 50" span
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« Reply #19 on: October 31, 2012, 11:34:54 AM »
kartikmadhira
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nice work man.even i finished my first avispad/
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« Reply #20 on: October 31, 2012, 11:43:56 AM »
arun.sreelakam
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thanks karthik.. i saw your build.. what about the electronics..build looks nice.. as i am a beginner need a  trainer first.. will do my maiden this week..  Drool Drool Drool Drool
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« Reply #21 on: October 31, 2012, 11:53:19 AM »
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Also make sure there is absolutely no vibration in motor or in prop,

just try to run the motor with prop and check before take off

all the best  Clap
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« Reply #22 on: October 31, 2012, 12:48:45 PM »
arun.sreelakam
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hai prasant no vibration at all in full throttle with prop... but the motor is getting heated...
is it common with this series..?
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« Reply #23 on: October 31, 2012, 01:12:46 PM »
kartikmadhira
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@arun.m a begineer too.and m on avispad.will post the electronics later.
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« Reply #24 on: October 31, 2012, 01:28:59 PM »
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Perfect Landing



And also make sure that the grub screws are enough tight for the e-max motor. I am also using the same motor E-Max CF 2822 for my spad model. For every flight i need to check the grub screws status, even though there is no vibration at all. But the motor power is really fantastic. I guess for your model weight you can even use 9x5 prop. It works fine. Because, for my model i am using 3s 2200 mah battery and same motor and 9x5 prop. It flies nicely and slowly.
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