Sponsored in part by...
Visit my Facebook
chopperaddict , R/C, helicopter ,
trex , interceptor , int400 , blade 400 ,
training , repairs , setups , sales ,
information , tips & tricks , help
custom builds , scale builds ,
spare parts , tutorials , info ,
align , t-rex , kds , copterx ,
copter-x , alien command ,
Helicommand , Flymentor ,
auto pilot systems , radio setup ,
kit building , Upgrades ,
hover training , setup training ,
Flight training , Phoenix training ,
HeliArtist , painting , detailing ,
to Fit a CopterX head & Tail to an
Interceptor 400 helicopter
As is the
case with many of the helicopters that beginners start off with, after a
time we like to improve them if we are able to do so.
One of the
first things that most helicopter pilots think of is to upgrade the
complete rotor head and tail to a higher quality, typically these are
made from CNC (Aluminium Alloy). Typical examples of this are
fitting a Trex450 or CopterX style head & tail to a Belt CP
or to the Interceptor 400
It has been
well documented elsewhere how to do this for the Belt CP, but not for
the Interceptor 400, so this Tip focuses on changing the Interceptor
400 to a genuine CopterX head and tail
Here is the head of the
finished Interceptor, which is one of my own helicopters
that is also fitted with the Flymentor Hover
|The first thing to do
of course is to remove the original head assembly.
The CopterX head that I bought came to me
fully assembled, with all connecting rods fitted and it was even
on a new mainshaft, so the obvious way for me was to simply
remove the 2mm bolt that you will find below the main gear and
autorotation gear, then disconnect the 3 connecting rods between
the swash plate and the servos at the swash plate end, and
finally pull the original mainshaft up and out of the aircraft
Before you lay it to one side you will still
need the locking collar off the old mainshaft below the swash
plate, and possibly also the original Interceptor swash plate as
well, so you may as well take them off the original head
assembly as well.
You may well be asking at this juncture, why
would I want the original swash plate ?
Well, the CopterX (& Trex450) rotor heads
use the normal 120 degree CCPM style swash plate, but the
Interceptor is not a CCPM helicopter, and therefore uses a 90
degree swash plate.
|As you can see from the
diagrams above, the left one shows the Interceptor 90 degree
swash plate layout, and the right shows the CCPM 120 degree
layout. The angles are those between the anti rotation pin
and the other two ball connectors on the outside of the swash
plate. The balls on the inner swash plate ring are
(almost) always at 90 degrees to each other.
So we have to use a 90 degree swash plate, and
usually this is most easily done by using that single part from
our original head.
||You can purchase CNC swash plates
by themselves as well. This one (from Microheli) shows a
90 degree swash plate with 4 balls around the outside, which is
perfect for an Interceptor 400 as it uses 2 opposite balls for
the elevator control arm, but with this one you would still need
to find an extended ball connector to fit into the anti rotation
|Another example of a 90 degree
swash plate, this time from Heli-Fever in the USA ($19.98 at the
time or writing this)
|Once you have got the
swash plate that you are going to use, replace the CopterX swash
with the new 90 degree one or the original one and connect the
control rods to it as normal.
As we are using a 90 degree swash you do not
have to mess around changing the position of the anti rotation
bracket, as you normally have to do when fitting these heads to
CCPM helicopters, so we can continue to use the original
position behind the main shaft.
So all that is left to do now is to refit the
mainshaft into the helicopter, remembering to make sure the
small thrust washer on top of the main gear is still
there. Fit the 2mm bolt to hold the main gear onto the
shaft, adjust the locking collar above the top main bearing to
pull the main shaft up as far as it will go, and reconnect the
rods from the servos back to the swash plate.
Finally, you will need to do a full mechanical
setup of the head again to ensure everything is perpendicular,
reset the pitch and take it out to test fly it.
|Fitting a CopterX
tail to an Interceptor 400
This is a pretty straightforward task
overall. However, you do have a choice to take.
Most of the tail assemblies we buy come ready
assembled with the toothed belt already fitted into the tail
assembly. This belt is longer than the belt used by the
Interceptor 400. The most obvious thing to do is to
dismantle the tail assembly, remove the CopterX belt and then
rebuild it again using the Interceptors belt.
However, for a small additional amount, you
could also buy a CopterX or Trex450 boom, which is of course
slightly longer, and then fit the new tail assembly to that and
then fit that boom onto the Interceptor 400. A benefit of
doing this is that because of the extra length, tail control is
also improved further.
|| Here is the tail
of my own Interceptor 400, showing the CopterX tails assembly
fitted using a Trex450 boom
HOPE THIS TIP HELPS YOU TO
IMPROVE YOUR OWN INTERCEPTOR 400