Thoughts On Nexus 30 First Flight

Thoughts On Nexus 30 First Flight

Post by Michael Fleische » Thu, 18 Nov 1999 04:00:00



Hi,

I built the Nexus about 2 months ago.  Last Sunday
I finally had time to try and fly it (yeah I know,
I have other hobbies as well).  I had spent a total of
about two weeks on RealFlight Deluxe practicing 20
minutes a night hovering in place.  I can actually fly the
thing without cutting my own head off now :).

This is a Tower Hobbies special with Hobbico training
gear.  Building it was cake.  This is my first heli,
and my first flying model in about 18 years (I am 29).  I took it
to a local hobby shop which specializes in Heli's and the
owner there checked the build and helped me adjust everything
on a bench.  I had been racing RC touring cars for a while now
so nitro engines and lots of mechanical bits didn't scare me much.

I flew three tanks, and was fortunate enough to have
help t*** it and flying from a veteran flyer on
the first flight.  No buddy box, just shouts of left, right,
kill power, run for your life!, etc...

The first flight was just short hops getting the
helicopter "light".  It tended to wander a bit and the
tail rotor response was very very fast.  Ok it wandered a lot.

The second flight I got about 1/2 to 3 ft  high and
the training gear picked up a harmonic frequency from the
helicopters vibration.  The traing gear started to oscillate
up and down about 6 inches peak to peak.  This was bad and
I was instructed to kill some power, and bring it down.  
Hearing the Wiffle balls clacking on the tarmac was not
entertaining (at least not for me).  Very nerve racking.  

The third flight I loosened the training gear *** bands
and the harmonic vibrations went away.  The heli flew just like
the simulator. It was a bit trickier, a whole lot more responsive,
and induced way more adrenaline than the simulator.
I landed it and was instucted to breath.  It was dark so I was done.

Thoughts:
Wow, I am hooked, these are very cool toys/models.  
I installed a remote glow connector to make starts easier.  This should
be standard.  
All in all, I am impressed that it flew so well "out of the box".  
I recommend to anyone trying one of these to take it to someone with
experience who can check it over and verify everything is going
in the right direction (gyro isn't reversed, collective and
throttle mix right, Pitch range is good, Rotors balanced properly
etc...).

Cost to play was:

Heli/Engine (OS32)/Radio/Gyro -617
Deluxe Flight Box/Starter/Fuel Pump/Fuel - 275
Blade Balancer, tracking tape, training gear - 70
Real Flight Deluxe - 250

Total -$1212

Any helpful tips/comments for a newbie are completely welcome.

Regards

Mike Fleischer

 
 
 

Thoughts On Nexus 30 First Flight

Post by Mike » Thu, 18 Nov 1999 04:00:00


Good luck with your Nexus. I know that many have compared the Nexus to the
Rapter, and the Rapter comes out tops, but I am still happy with my Nexus.

I had a number of problems with the ARF Nexus 30S that I purchased, and one
of those problems was the clutch drum that was poorly machined and caused
excessive engine vibration resulting in the muffler becoming loose each time
the Heli was used - this in turn messed oil all over . I also
fitted a silicone tube to the muffler outlet and directed it away to the
rear of the Heli.
Kyosho supplied the new clutch drum at no cost.

With the ARF  following should be inspected:
    1. Ensure that thread lock is used where applicable - Engine mounting
screws,fan to engine crankshaft screw,tail rotor drive coupling set***
and clutch shoe screw's etc.
    2. Ensure that the four mast stopper set screws are tightened in the
correct routine to ensure that there is no runout of the main mast.
    3. The three tail rotor drive wire support bushes were not correctly
spaced in the boom.
    4. Install a second set***in the rear tail rotor drive coupling - it
is supplied with only one screw, but is tapped for two - apply thread lock!
    5. The tail pitch slider on my Heli was too tight and would most likely
have overheated the two bushes - I have since changed these bushes to
bearings.
    6. I cut all the plastic link balls off and fitted steel ones - this was
a cheap and easy exercise and made for much smoother and longer lasting
operation .
    7. The main gear mesh was not correctly set - I shimmed this up myself.
The main gear was also warped and this was corrected by shimming under the
surface where the gear attaches to the aluminium hub.

The above mentioned all requiring attention on the ARF that I purchased - I
will never buy ARF again.

After correcting all the ARF assembly error's I am very happy with my Nexus
30S.

Make two storage braces for the main skids from a heavy wire coat hanger -
two pieces of wire with the ends turned up - the curved up ends go around
the aluminium skids and this prevents the plastic skids supports from
spreading when stored.

Low cost upgrades that I would consider  installing (not neccessarly
immediately) would be a better swash plate, and at the time a boom
replacement is required, install the deluxe model drive wire and supports.
I would also like to get rid of the "Z" bends on the servo horns.

Ron Gratton
Daelim Apt. 202-107
Eup Nae-Dong 624-1
Sosan City, Choongnam
South Korea, 356-020

Ph. +82-455-666 2944
Cel. +82-17-427 1157

Remove the XXX

 
 
 

Thoughts On Nexus 30 First Flight

Post by FLIERS » Thu, 18 Nov 1999 04:00:00


I'm curious. I am a heli instructor and use a training method that has been
called "two pilots-- two sticks method. I explained how this worked before and
was assured that it was nothing new. I was wondering if your instructors had
heard of this method and if they did, why didn't they teach you that way?  It
is 99% safe and the student gets to hover solid for the length of its fuel
capacity.

Take care,
CCR

 
 
 

Thoughts On Nexus 30 First Flight

Post by Leif Thomso » Fri, 19 Nov 1999 04:00:00


Congratulations!

The adrenaline factor is a significant issue with helis.  I do all sorts of
maneuvers in the simulator without thinking about the consequences.  Trying
the same in real life ends up with my hands shaking so much I can barely
hold the radio.  It's an important thing to remember.

With your tail sensitivity, you might want to check two things:

1.  If you're using a standard gyro (not heading-hold), then your gain might
be too low.

2.  If you have a cheap/slow tail-rotor servo (S-148), then the gyro might
be working against you.  The gyro tries to compensate for the tail movement,
but the servo is too slow and over-shoots the correction.  When I upgraded
from a Futaba S-148 to a 9203 tail response became much more predictable.

Keep at it.  This is an extremely ***ive hobby.

Leif


Quote:
> Hi,

> I built the Nexus about 2 months ago.  Last Sunday
> I finally had time to try and fly it (yeah I know,
> I have other hobbies as well).  I had spent a total of
> about two weeks on RealFlight Deluxe practicing 20
> minutes a night hovering in place.  I can actually fly the
> thing without cutting my own head off now :).

> This is a Tower Hobbies special with Hobbico training
> gear.  Building it was cake.  This is my first heli,
> and my first flying model in about 18 years (I am 29).  I took it
> to a local hobby shop which specializes in Heli's and the
> owner there checked the build and helped me adjust everything
> on a bench.  I had been racing RC touring cars for a while now
> so nitro engines and lots of mechanical bits didn't scare me much.

> I flew three tanks, and was fortunate enough to have
> help t*** it and flying from a veteran flyer on
> the first flight.  No buddy box, just shouts of left, right,
> kill power, run for your life!, etc...

> The first flight was just short hops getting the
> helicopter "light".  It tended to wander a bit and the
> tail rotor response was very very fast.  Ok it wandered a lot.

> The second flight I got about 1/2 to 3 ft  high and
> the training gear picked up a harmonic frequency from the
> helicopters vibration.  The traing gear started to oscillate
> up and down about 6 inches peak to peak.  This was bad and
> I was instructed to kill some power, and bring it down.
> Hearing the Wiffle balls clacking on the tarmac was not
> entertaining (at least not for me).  Very nerve racking.

> The third flight I loosened the training gear *** bands
> and the harmonic vibrations went away.  The heli flew just like
> the simulator. It was a bit trickier, a whole lot more responsive,
> and induced way more adrenaline than the simulator.
> I landed it and was instucted to breath.  It was dark so I was done.

> Thoughts:
> Wow, I am hooked, these are very cool toys/models.
> I installed a remote glow connector to make starts easier.  This should
> be standard.
> All in all, I am impressed that it flew so well "out of the box".
> I recommend to anyone trying one of these to take it to someone with
> experience who can check it over and verify everything is going
> in the right direction (gyro isn't reversed, collective and
> throttle mix right, Pitch range is good, Rotors balanced properly
> etc...).

> Cost to play was:

> Heli/Engine (OS32)/Radio/Gyro -617
> Deluxe Flight Box/Starter/Fuel Pump/Fuel - 275
> Blade Balancer, tracking tape, training gear - 70
> Real Flight Deluxe - 250

> Total -$1212

> Any helpful tips/comments for a newbie are completely welcome.

> Regards

> Mike Fleischer

 
 
 

Thoughts On Nexus 30 First Flight

Post by E.. » Fri, 19 Nov 1999 04:00:00


I've got a nexus page, although it's light on upgrades.  If you want
upgrades you'll become familiar with Zeal.

http://www.FoundCollection.com/

Have fun!


Quote:
>Hi,

>I built the Nexus about 2 months ago.  Last Sunday
>I finally had time to try and fly it (yeah I know,
>I have other hobbies as well).  I had spent a total of
>about two weeks on RealFlight Deluxe practicing 20
>minutes a night hovering in place.  I can actually fly the
>thing without cutting my own head off now :).

>This is a Tower Hobbies special with Hobbico training
>gear.  Building it was cake.  This is my first heli,
>and my first flying model in about 18 years (I am 29).  I took it
>to a local hobby shop which specializes in Heli's and the
>owner there checked the build and helped me adjust everything
>on a bench.  I had been racing RC touring cars for a while now
>so nitro engines and lots of mechanical bits didn't scare me much.

>I flew three tanks, and was fortunate enough to have
>help t*** it and flying from a veteran flyer on
>the first flight.  No buddy box, just shouts of left, right,
>kill power, run for your life!, etc...

>The first flight was just short hops getting the
>helicopter "light".  It tended to wander a bit and the
>tail rotor response was very very fast.  Ok it wandered a lot.

>The second flight I got about 1/2 to 3 ft  high and
>the training gear picked up a harmonic frequency from the
>helicopters vibration.  The traing gear started to oscillate
>up and down about 6 inches peak to peak.  This was bad and
>I was instructed to kill some power, and bring it down.  
>Hearing the Wiffle balls clacking on the tarmac was not
>entertaining (at least not for me).  Very nerve racking.  

>The third flight I loosened the training gear *** bands
>and the harmonic vibrations went away.  The heli flew just like
>the simulator. It was a bit trickier, a whole lot more responsive,
>and induced way more adrenaline than the simulator.
>I landed it and was instucted to breath.  It was dark so I was done.

>Thoughts:
>Wow, I am hooked, these are very cool toys/models.  
>I installed a remote glow connector to make starts easier.  This should
>be standard.  
>All in all, I am impressed that it flew so well "out of the box".  
>I recommend to anyone trying one of these to take it to someone with
>experience who can check it over and verify everything is going
>in the right direction (gyro isn't reversed, collective and
>throttle mix right, Pitch range is good, Rotors balanced properly
>etc...).

>Cost to play was:

>Heli/Engine (OS32)/Radio/Gyro -617
>Deluxe Flight Box/Starter/Fuel Pump/Fuel - 275
>Blade Balancer, tracking tape, training gear - 70
>Real Flight Deluxe - 250

>Total -$1212

>Any helpful tips/comments for a newbie are completely welcome.

>Regards

>Mike Fleischer

 
 
 

Thoughts On Nexus 30 First Flight

Post by Michael Fleische » Fri, 19 Nov 1999 04:00:00


Instructors?  I didn't really have any instructors.  This
guy, Alan, at the field helped tremendously by t*** the
Nexus out on its maiden flight.  He also stood next to me
and shouted commands.  

Both were very helpful, though most of the time hovering is
anticipating the helicopter moving just before it does, and
counter acting the movement.  

I learned to fly on RealFlight Deluxe's .30 trainer model.
Its funny because I went back to RealFlight after flying
the real thing and found that all of the simulator's heli's
were a breeze to fly and hover (except the electric one).

I am now attempting to perfect hovering sideways and tail
out.  

I'd recommend this simulator to anyone trying to learn heli's
for the first time.  It is a must.

Regards,
Mike Fleischer

: I'm curious. I am a heli instructor and use a training method that has been
: called "two pilots-- two sticks method. I explained how this worked before and
: was assured that it was nothing new. I was wondering if your instructors had
: heard of this method and if they did, why didn't they teach you that way?  It
: is 99% safe and the student gets to hover solid for the length of its fuel
: capacity.

: Take care,
: CCR