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GiachiG aka Typico

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Hi!!

as suggested i start to write about my new project in this forum..
about me, i'm an italian rocket enthusiast, i started with rockets in 2004 and got L1 in 2006.
last year i tryed to achive L2 in Spain but problems with recovery sistem caused the total destruction of the rocket

and now, little presentation of the project

this is the new version of a rocket that have flew in 2008 in Spain, yes, the one that had problems... the rocket were completly destroyed after climbing without any chute, from 400mt

this rocket is not properly a rocket, it's an upscale of a Budweiser bottle, that's the why of it's name

weight and dimension? around 20kg ready for flight and 230cm tall!!!

the rocket were not painted, the painting were planned for the winter but...

now few photos of the old bottle, the motor were a K700...









 

GiachiG aka Typico

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for this new version i radically changed the construction approach

firs of all i started building every piece with rinoceros...


with the help of the software i can carrect errors before start the construction and this cut more construction times

and i added 4 boosters to increase thrust time and obviously quote

more views and details

in this you can see the 4 unaligned boosters on the back and the coupler that join the 2 parts of the rocket


this is another view

the L slides match with 3 notch in the tube inside the "neck" of the bottle, this make the transport easyer and also in this zone there will be the electronics bay

and now the image of the entire rocket
 

brianc

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Nice pic and (too short) write-up in the May-June Extreme Rocketry
magazine.

Good to see more details! Keep'em coming...
 
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GiachiG aka Typico

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and now some pictures of the construction.. at the moment i have finished to shape the fins and prepared the coupler thet join neck/body


all the tubes


fins are made with low cost material, 6mm pine...


some cut detail, good job:D


and references points... this make easyer the next step
I did not had to measure anymore;)

then i started to cut all the pieces for the fins

all numbered to avoid confusion



at the end everyting combines perfectly... all the fins are perfectly idem


to lighten the structure i then used styrofoam


shaped and trimmed


a larger view
 

GiachiG aka Typico

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Nice pic and (too short) write-up in the May-June Extreme Rocketry
magazine.

Good to see more details! Keep'em coming...
really?? i'm excited to hear it!!
this time pics will look better with a perfect painting:D
 

GiachiG aka Typico

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more details, every piece is measured by eye and cut by hand... eheheh



now some pics of the gluing of the styrofoam in place...
to do tis i used the vaccum tecnique, this ensured perfect join of the 2 faces with the core material




the sistem is very easy, a bag, a fridge motor and tubes...


when resin has cured, i started to sand the airfoil shape


and shaped the airfoil i added balsa to edges

this material will be sanded to approx 45°

pieces trimmed and ready to sand


to make faster the sanding i cut out some balsa with a knife.. then i sanded to desired angle


sanded just one face..


and the job done
 

GiachiG aka Typico

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now images of the coupler

i first draw the shape of the rail and draw it again in the coupler...
with the dremel i then cut it






with the coupler ready took measures to place the notch in the "neck" tube..
the 3 things are made by styrene tube, set in place with cyano and then filled with resin to increase strenght.. i'm planning to change material with something more resistent but is not very necessary


and the coupler slides perfectly...


tomorrow more photos...
 

rstaff3

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It's interesting to see the details of a huge build that's more than just an 'upscale' of typical mid- or small-high power techniques. Great post!
 

GiachiG aka Typico

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all composites are arrived!!! glass and carbon, 10kg of resin and other stuff :D:D

next days i will work on the fins

but now, i drew some new details in shoulder section of the bottle
things like altimeter and pyro-release..

take a look, it's been funny to add details to the altimeter...
from now, in my next projects i can add it in seconds!!







stay tuned!!!:dark:
 

g_boxwood

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Typico: you are really kicking with this build!

Do you plan to internally reinforce the L-shaped notch? I'm afraid the brittle phenolic could not handle it in the long term... just add a square of glass or a thin ply layer.

I see you got into vacuum bagging, how is it? is it user-friendly or not? does it require a big workshop or things like that?

I've always been interested in it but never got the nuts to start!

About canted motor mount tubes: ask in here!
 

GiachiG aka Typico

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Typico: you are really kicking with this build!

Do you plan to internally reinforce the L-shaped notch? I'm afraid the brittle phenolic could not handle it in the long term... just add a square of glass or a thin ply layer.

I see you got into vacuum bagging, how is it? is it user-friendly or not? does it require a big workshop or things like that?

I've always been interested in it but never got the nuts to start!

About canted motor mount tubes: ask in here!
thanks, thanks, thanks, to all!!!!:):)

for you Box, yes the coupler would be reinforced... i'm posting the photos right now...

the vacuum is an easy tecnique, i done it with few spare parts laying in my workshop, tubes are regular 5mm air lines and the T deviations are garden irrigation parts
bags are common thick plastic bags, i use it at work and the cost is nearly zero.. i heard about bags that costs 6€ :eyepop: useless for my user-friendly approach to it

the pump is a common fridge motor, works well but the force is low, I tryed to connect 3 bags but the resulting downpressure were to low and I then done just 2 fins at time

obviously things can be maked better but for a fast and cheap start it don't really need mote than this!!!!!!

space depends on what are you building, it need no more than the space of the piece, the pump is not so big and tubes can be handled easily

for better results there are lots of things you can buy, this was my first try and i'm happy of the results!!!

:p
 

GiachiG aka Typico

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to make the coupler stronger and ensure it a long work life, I added a core-layer of depron-like material, 8mm thick... internally there would be 3 layers of 160gr/m glass.

to do this I firs cut the styrofoam and i had to gave it a round(more or less) shape


then i trimmed it to precise measure by several trying...



when got the right measure i started to resin the internal of the coupler and pushed the foam in place..


to keep the shape of the loose edges i then thinked to slide the coupler in a piece of tube....

and to extract it easily once resin has cured i wrapped a piece of plastic bag outside the coupler.





this is the piece once extracted



at this point i had to mill the notch a little...



now it's more stronger than before and with glass it's strenght would increase incredibly
 
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GiachiG aka Typico

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hi..

the entire thing is slowing down cause of tendon inflammation(hope it's correct) on one hand
the pain is low but overstress it is not good...

few days of relax and i'll be back with tons of photos!!!!

i'm drawing and changing stuff on the 3d model for the moment

i'm drawing also the canted motors tubes and i have a doubt, pointing them forward the CG can be dangerous???

the central motor burns for less than boosters do and the balance point it's too near the bottom to angle the motors on it....

i knew canted motors were to be pointed between CG and CP but what happends if force is applyed forward the CG??
i kinda think no big problems can happend cause rocket is moving when boosters fires and also the distance from CG and where the tubes will poin is not that far...
a little rotation can happend but those HUGE fins may handle it...
also there must be a misfire to get the problem otherwise nothing change in flight path...

is it completly wrong???

bye!!!
 
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Reed Goodwin

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Awesome looking build! This is going be an impressive finished rocket.
Reed
 

TheAviator

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hi..

the entire thing is slowing down cause of tendon inflammation(hope it's correct) on one hand
the pain is low but overstress it is not good...

few days of relax and i'll be back with tons of photos!!!!

i'm drawing and changing stuff on the 3d model for the moment

i'm drawing also the canted motors tubes and i have a doubt, pointing them forward the CG can be dangerous???

the central motor burns for less than boosters do and the balance point it's too near the bottom to angle the motors on it....

i knew canted motors were to be pointed between CG and CP but what happends if force is applyed forward the CG??
i kinda think no big problems can happend cause rocket is moving when boosters fires and also the distance from CG and where the tubes will poin is not that far...
a little rotation can happend but those HUGE fins may handle it...
also there must be a misfire to get the problem otherwise nothing change in flight path...

is it completly wrong???

bye!!!

Most people don't cant their motor tubes at all. As long as your rocket has a high pitch moment of inertia, you should be fine, especially since you're already moving.

Canting your motors at all towards the CG away from vertical will reduce the lever arm, and thereby the tendency of the rocket to pitch should a motor misfire.
 

GiachiG aka Typico

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here again with more photos

in these days i couldn't wait fot the pain at the hand so i continued doing stuff over stuff...

i also changed something on the drawings couse there were errors...

so let's start with the sdescription
my plot-man it's too slow so i had to do all the work by me... I joined thousands of sheets of paper for the bigger rings!!!


and every piece took place in wood sheet


i then write on every piece it's code...


a little printout of the wole project is helpfull when pieces are that much...


the art of borrow :)


every piece it's now ready to "wear it's drawing"




i don't use glue, so all the drawings are held in place by the masking tape.. this mean that i have to start to cut from inside of the piece :rolleyes:


and once the hole it's cut, i just start with the external lines
this it the contour of the cap, this precise cut mean 20 minutes or so of work






i'm very satisfyed of this cut!!!!!:roll::roll:

pieces must be cut precisely to ensure a perfect fit of all the parts...


some other details


those are parts of the shoulder of the bottle


if cut is precise, the sanding phase it's shorter than a breath... ehehe


and a big ring, notice all the changes to the drawing...
 

GiachiG aka Typico

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with all the pieces cut, i started to dry-fit everithing
every piece fit it's place... this is very satisfying!!:cool:

photos talks better!




 

GiachiG aka Typico

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cause a rocket it's not just centering rings, i had to cut also tubes...

this are the canted boosters, everyting it's be drawn with rhinoceros ad then, with the proper command, i printed the exterior of the tubes

this helps alot to find the right cut angle... doing this job without the help of a pc it's impossible i think... the result is perfect

but let's see something




i started by wrapping the printout around the tubes and fixing is with masking tape..

after this, with the help of a sharp blade, i cut out the unwanted portions of paper




to cut the tubes i usually use dremel with normal cut disks..
at the end i tryed the fit... absolutly perfect, i didn't expected a job like this!!!



today's photos are about construction.. i started to glue the neck and it's ready to be laminated!!!
 

GiachiG aka Typico

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firsts pieces together!!

i started with the neck because this part is the easyest and also it don't need anithing else inside

i glued rings and roads, to glue the lower level of roads in precise way i drawn allignement guides onto the upper ring.. then some cyano and job it's done!







i also glued the bolts of the 3 shelfs inside the neck, and after this i covered everithing with a sort of cardboard... it's very light and flexible
nothing is structural.. just first and last rings, all the job is done by glass cloth.







here are photos of the shoulder section, i lightly glued pieces, it's just for shape and not structural.. you can also see the ebay
it's just a try for the moment, i'm drawing it with program to check for space




and this is the ejction charge holder... there is a tube and 3 rings under the foam.. i use it to place ejection charges upper the chute without wires lying around



enough for today...
 

Reed Goodwin

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I don't know how to express how beautiful that work is. You, sir, are quite the craftsman!
Reed
 

judo

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Do they still have "Shop Class" in high school anymore, or just encounter groups? I think they all fired the shop teachers and hired p-sycologists.
 

Reed Goodwin

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In my high school you could take a class and travel to another high school and learn how to fix cars. That's as good as it got, though. I wish we had had a woodworking class, as I would have jumped on that in a second.
Reed
 

GiachiG aka Typico

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are you asking me about the shop class??

i did not got the meaning, my english i very poor....
if i got it, this is not a group work, just me and my patience :p

now i will post some new photos!!! work is going fast, most of the time i have dirt and resin on my hands and i can't make photos... so please understand if there are not many photos....
 
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GiachiG aka Typico

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here we are.. firsts assembly are done, all the portions are glued
there are 6 different assembly to work on

-Fins
-Body
-Shoulder
-Neck
-Couplers
-Cap

for the moment the neck is the nearest to be finished

the coupler section is been redrew to better work on wirings in the future

fins are coming, the first is ready, it's hard like rock, no way to flex it in any direction
there are 2 layers of 160gr/sqr mt glass, a stripe of 200gr/sqr mt carbon between the layers above and another ply of 80gr/sqr mt glass for a better finish

in the images there is also the ebay, i glued it in place this morning..

and the canted mmt ready for a glass cloth























 

judo

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We were wondering were and how you learned to be so skilled.

Wood craft is not taught in schools in the US any longer.
 

sandman

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We were wondering were and how you learned to be so skilled.

Wood craft is not taught in schools in the US any longer.
I know this all too well. As a woodworker this breaks my heart.

Does anybody realize that woodworking is THE number two hobby in this country. The only hobby that beats it is gardening.

Of course degrees of expertise vary a great deal.

I guess if you mow your lawn you can be considered a "gardener" and if you've built a birdhouse you're a "woodworker".

OK, back to the flying beer bottle.

Very nice work too!
 

GiachiG aka Typico

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We were wondering were and how you learned to be so skilled.

Wood craft is not taught in schools in the US any longer.
ahahah, no school or course of anything, just trying :)

the biggest advantage i take is to look at others jobs, for example, gboxwood is my point of reference.. most of the thing i do cames from he's posts
so if i have to do something difficult i first study how others do it!!

obviously you need good hands and eye.. otherwise success is not what you get :rolleyes: :rolleyes:

the firs piece of anything i do, it's always the worse, everything cames next, i know how to do it good!!

tomorrow the continue of the post... (maybe)
 

g_boxwood

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A few things dear friend:

1. wonderful!

2. great job!

3. well done!

4. what the heck of a workshop! it's huge!

5. pretty clean cuts on those rings, they turned out great!

6. don't leave the print shop without the prints!

7. aahhh those canted tubes, I'd rather skip on them! the project will be already expensive to fly, are you really sure you want a 5 motor cluster with 4 K250???

8. you're flattering me!

Keep up the good work!!!
 

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