•
What‘s the failure rate of your current parachute systems?
Our
Phoenix
5
Side
Deployment
System
is
very
reliable
with
a
failure
rate
of
only
3/70
(in
March
2017)
which
equals
4.2%.
Two
of
the
three
failures
could
have
been
avoided
if
our
current
checklist
had
been
applied
correctly.
Our
version
of
the
Radial
Deployment
System
had
a
few
issues
in
the
beginning,
but
we
were
able
to
improve
the
reliability
a
lot.
Our
latest
addition
to
our
parachute
system
family,
which
is
used
in
the
„Falcon“
rockets,
hasn‘t
completed enough launches yet for a trustworthy valuation.
•
Why do you (still) use a mechanical tommy timer and no electrical system?
Our
current
tommy
timer
based
systems
like
Phoenix
5
and
Raketfued
RDS
are
more
reliable
than
many
systems
which
are
based
on
electrical
timers
or
sensors.
A
tommy
timer
is
also
a
lot
more
affordable.
That‘s
especially
relevant
because
most
failures
or
crashes
also
affect
the
parachute
system.
Last
but
not
least,
electrical
systems
are
heavier
than our mechanical systems. Thus, we see no reason to switch to an electrical system.
•
Which altimeter do you use and where can I buy it?
We
use
a
range
of
altimeters.
In
our
first
water
rocket
which
included
an
altimeter
we
used
the
“Altimax
Simply”
made
by
Rocketronics
,
but
this
altimeter
can‘t
output
the
data
in
a
table
or
chart.
That‘s
why
we
switched
to
a
prototype
made by the German Aerospace Center DLR. We also use the
Hobbyking Altimeter
in many of our rockets.
•
Which parachute size do I need for my rocket?
That depends on its weight. Usually the recommended payload is given on the packaging or on the website.
•
Which parachute system should I use? Side deployment or radial deployment?
That depends on the method of construction you use. If you build a rocket consisting of multiple segments, the radial
deployment system is usually more appropriate.
•
Did you create your logo and your website on your own?
Absolutely!
It
is
very
import
for
us
to
have
a
corporate
identity
across
all
social
media
accounts.
That‘s
also
the
reason
why
we
did
not
use
a
template
to
create
our
website.
We
truly
want
to
deliver
a
browsing
experience
that
is
optimized
for what we do.
•
What equipment do you use??
You can read more about our equipment
here
.
•
Why don‘t you publish videos every week or month?
Videos
about
Water
Rocketry
are
quite
a
lot
of
work,
especially
tutorials.
We
often
need
more
than
four
shooting
days
and
launch
days
require
a
whole
day
of
good
weather.
But
the
most
time
consuming
part
is
the
video
editing,
which
is
hard
work
and
takes
often
several
days.
We
also
don‘t
want
to
stress
ourselves
too
much
because
that
would
affect
the video quality negatively.
•
Can you please add my YouTube channel / website about Water Rocketry to your link list?
Just send us the link and we will check it‘s content and decide whether we want to add it or not. ;)
•
Where do you find your background music?
The
process
of
finding
music
is
never
the
same.
We
buy
many
songs
which
are
especially
licensed
for
the
use
in
videos on Audionetwork or Audiojungle. We also regularly check the YouTube Library for new music.
•
How old are you? Are you still attending school?
We
are
all
19
and
20
years
old.
Some
of
us
are
still
attending
school,
but
some
have
already
started
studying
and
working. (March 2018)
•
Where do you come from?
We‘re located in southern Germany near Stuttgart.
•
Can we make a launch day together with you?
Just contact us and maybe there is a way we could visit one of your launch days or you could visit us…
•
What happened with the partnership with Aircommando Walldorf?
Unfortunately
Timo
from
ACW
doesn‘t
build
water
rockets
any
more.
However,
we
became
very
good
friends
over
the
last
couple
of
years.
Timo
will
visit
one
of
our
launch
days
in
the
future.
And
if
he
decides
to
return
to
water
rocketry,
we will be happy to help him wherever we can.
•
How is your relation to other water rocketeers?
We
appreciate
everybody
who
contributes
to
this
awesome
hobby.
We
always
try
to
keep
in
touch
with
other
water
rocketeers.
For
example,
our
colleagues
from
AirCommandRockets
and
USWaterRockets
often
help
us
to
translate
video scripts into English.
MORE QUESTIONS?
Write us at: Raketfued@gmx.de
BUILDING PRESSURE VESSELS
•
Which polyurethane adhesive do you recommend?
First
things
first:
There
are
a
bunch
of
adhesives
which
can
be
used
sticking
bottles
together.
Sikaflex
11FC
is
great
to
seal
the
joints,
but
unfortunately
it
is
unable
to
resist
against
pressure
and
pulls.
That‘s
why
you
should
only
use
Sikaflex
if
you
plan
to
reinforce
your
rocket
additionally
with
fiber
glass
or
carbon
fiber.
If
you
want
to
stick
pressure
vessels without further reinforcement, PL Premium is a very good adhesive which is able to hold up to 130 psi.
•
Do you recommend to build a pressure vessel consisting of multiple segments?
Multiple
segments
are
great,
because
they
allow
you
to
simply
replace
any
part
of
the
vessel
in
case
it
is
damaged.
On
the
other
side
a
single
large
vessel
is
more
compact
and
is
lighter.
You
can
also
combine
both
construction
methods
like
we
did
with
our
„Ueberflieger“
rockets.
We
created
a
detailed
tutorial
about
different
construction
methods.
You
can find it
here
.
•
Where do you get tornado tubes?
Some
of
our
tornado
tubes
are
made
by
a
member
of
the
German
Water
Rocketry
forum
called
„Batkiter“,
but
we
also
use tornado tubes
bought online
.
PARACHUTE SYSTEM
LAUNCHER AND NOZZLE
•
My nozzle leaks. What did I do wrong?
Well,
clairvoyance
isn‘t
one
of
our
best
skills.
However,
we
created
a
list
with
the
most
recent
causes:
The
seal
or
the
thread
in
the
bottle
cap
is
damaged,
the
seal
of
the
tap
nut
adapter
wasn‘t
removed,
you
didn‘t
use
enough
epoxy
or
you waited not long enough after sticking the bottle cap into the adapter.
•
Which nozzle size is the best one for my rocket?
If
your
rocket
is
fairly
small
(about
one
or
two
liters
volume)
small
nozzles
work
very
well.
But
if
you‘re
rocket
is
bigger
than that, we would suggest that you use larger nozzles or even no nozzle at all (that requires a Full Bore Launcher).
•
Where did you get these white nozzles?
Just
like
some
of
our
tornado
tubes,
these
nozzles
were
made
by
a
member
of
the
German
Water
Rocketry
Forum
called Batkiter.
VIDEOS AND WEBSITE
ABOUT US
FAQ
FREQUENTLY ASKED QUESTIONS
updated regularly
English
Change language:
FAQ
FREQUENTLY ASKED QUESTIONS
•
What‘s the failure rate of your current
parachute systems?
Our
Phoenix
5
Side
Deployment
System
is
very
reliable
with
a
failure
rate
of
only
3/70
(in
March
2017)
which
equals
4.2%.
Two
of
the
three
failures
could
have
been
avoided
if
our
current
checklist
had
been
applied
correctly.
Our
version
of
the
Radial
Deployment
System
had
a
few
issues
in
the
beginning,
but
we
were
able
to
improve
the
reliability
a
lot.
Our
latest
addition
to
our
parachute
system
family,
which
is
used
in
the
„Falcon“
rockets,
hasn‘t
completed
enough
launches
yet
for
a
trustworthy valuation.
•
Why do you (still) use a mechanical tommy
timer and no electrical system?
Our
current
tommy
timer
based
systems
like
Phoenix
5
and
Raketfued
RDS
are
more
reliable
than
many
systems
which
are
based
on
electrical
timers
or
sensors.
A
tommy
timer
is
also
a
lot
more
affordable.
That‘s
especially
relevant
because
most
failures
or
crashes
also
affect
the
parachute
system.
Last
but
not
least,
electrical
systems
are
heavier
than
our
mechanical
systems.
Thus,
we
see
no
reason
to switch to an electrical system.
•
Which altimeter do you use and where can
I buy it?
We
use
a
range
of
altimeters.
In
our
first
water
rocket
which
included
an
altimeter
we
used
the
“Altimax
Simply”
made
by
Rocketronics
,
but
this
altimeter
can‘t
output
the
data
in
a
table
or
chart.
That‘s
why
we
switched
to
a
prototype
made
by
the
German
Aerospace
Center
DLR.
We
also
use
the
Hobbyking
Altimeter
in many of our rockets.
•
Which parachute size do I need for my
rocket?
That
depends
on
its
weight.
Usually
the
recommended
payload
is
given
on
the
packaging or on the website.
•
Which parachute system should I use? Side
deployment or radial deployment?
That depends on the method of construction
you use. If you build a rocket consisting of
multiple segments, the radial deployment
system is usually more appropriate.
•
Did you create your logo and your website
on your own?
Absolutely!
It
is
very
import
for
us
to
have
a
corporate
identity
across
all
social
media
accounts.
That‘s
also
the
reason
why
we
did
not
use
a
template
to
create
our
website.
We
truly
want
to
deliver
a
browsing
experience
that is optimized for what we do.
•
What equipment do you use??
You can read more about our equipment
here
.
•
Why
don‘t
you
publish
videos
every
week
or month?
Videos
about
Water
Rocketry
are
quite
a
lot
of
work,
especially
tutorials.
We
often
need
more
than
four
shooting
days
and
launch
days
require
a
whole
day
of
good
weather.
But
the
most
time
consuming
part
is
the
video
editing,
which
is
hard
work
and
takes
often
several
days.
We
also
don‘t
want
to
stress
ourselves
too
much
because
that
would
affect
the
video
quality negatively.
•
Can
you
please
add
my
YouTube
channel
/
website
about
Water
Rocketry
to
your
link
list?
Just
send
us
the
link
and
we
will
check
it‘s
content
and
decide
whether
we
want
to
add
it
or not. ;)
•
Where do you find your background music?
The
process
of
finding
music
is
never
the
same.
We
buy
many
songs
which
are
especially
licensed
for
the
use
in
videos
on
Audionetwork
or
Audiojungle.
We
also
regularly
check
the
YouTube
Library
for
new
music.
•
How
old
are
you?
Are
you
still
attending
school?
We
are
all
19
and
20
years
old.
Some
of
us
are
still
attending
school,
but
some
have
already
started studying and working. (March 2018)
•
Where do you come from?
We‘re
located
in
southern
Germany
near
Stuttgart.
•
Can
we
make
a
launch
day
together
with
you?
Just
contact
us
and
maybe
there
is
a
way
we
could
visit
one
of
your
launch
days
or
you
could visit us…
•
What
happened
with
the
partnership
with
Aircommando Walldorf?
Unfortunately
Timo
from
ACW
doesn‘t
build
water
rockets
any
more.
However,
we
became
very
good
friends
over
the
last
couple
of
years.
Timo
will
visit
one
of
our
launch
days
in
the
future.
And
if
he
decides
to
return
to
water
rocketry,
we
will
be
happy
to
help
him
wherever we can.
•
How
is
your
relation
to
other
water
rocketeers?
We
appreciate
everybody
who
contributes
to
this
awesome
hobby.
We
always
try
to
keep
in
touch
with
other
water
rocketeers.
For
example,
our
colleagues
from
AirCommandRockets
and
USWaterRockets
often
help
us
to
translate
video
scripts
into
English.
MORE QUESTIONS?
Write us at: Raketfued@gmx.de
BUILDING PRESSURE VESSELS
PARACHUTE SYSTEM
LAUNCHER AND NOZZLE
•
My nozzle leaks. What did I do wrong?
Well,
clairvoyance
isn‘t
one
of
our
best
skills.
However,
we
created
a
list
with
the
most
recent
causes:
The
seal
or
the
thread
in
the
bottle
cap
is
damaged,
the
seal
of
the
tap
nut
adapter
wasn‘t
removed,
you
didn‘t
use
enough
epoxy
or
you
waited
not
long
enough
after sticking the bottle cap into the adapter.
•
Which nozzle size is the best one for my
rocket?
If
your
rocket
is
fairly
small
(about
one
or
two
liters
volume)
small
nozzles
work
very
well.
But
if
you‘re
rocket
is
bigger
than
that,
we
would
suggest
that
you
use
larger
nozzles
or
even
no
nozzle
at
all
(that
requires
a
Full
Bore
Launcher).
•
Where did you get these white nozzles?
Just
like
some
of
our
tornado
tubes,
these
nozzles
were
made
by
a
member
of
the
German Water Rocketry Forum called Batkiter.
VIDEOS AND WEBSITE
ABOUT US
updated regularly
English
Change language:
HOME
ABOUT US
ROCKETS
LAUNCHES
ARTICLES
TUTORIALS
EDUCATION
HOME
ABOUT US
ROCKETS
LAUNCHES
ARTICLES
TUTORIALS
EDUCATION
