Gwaihir

I'm planning on building my own micro heli... for those who are familer with the Pixelito design... that is what I'm aiming for... I need some help though... I have some questions that need answering...

where can I find extremely cheap parts???

I need an extremely simple non-swashplate type design...

what kind of store would I find carbon rods???

how can I make simple, light wieght propelers???

and any other things anyone would like to add...


thanks!!!

Freakazoid

My Feedback: (1)

Sabot

Whats the background info? can you already fly helis? budget....?

Freakazoid

My Feedback: (1)

Well, I was assuming hes got money comin out his ears, and already has a load of helis, because else trying this is perty futile. [&:]

marked23

Freakazoid> Check out the hornet swashless upgrade at Heli Hobby

Swashless? How could that work?

-Mark

Freakazoid

My Feedback: (1)

Oops, I meant flybar.
Go look for yourself.

Heres a video.. click

A dragonfly micro is swashless, If im not mistaken.

VinceHerman

Gwaihir,
I started to reply to this earlier this morning, but cable went down for maintenance, so I will try again.

That is a very challanging goal.
I assume that you have plenty of heli experience. If not, this is not the way to get into micro helis. What heli experience do you have?
What budget do you have? The pixelito does not use off the shelf parts. You will have to design, make, test, and experiment with your own.
What micro RC experience do you have? I have a fair amount of experience with small RC. I made a 2 ounce RC plane. A much less critical application that a heli. But one that tested my skills. The really, really good guys who have purchased the expensive super lightweight RC equipment get less than an ounce. Builders with skills beyond us mortals can make their own electronics, and shave fractions of grams off everywhere. The Pixelito builder has such skills.


I am not aware of much about micro helis that is cheap. Your goals compound this becuase there is not many commercial offerings for something on the Pixelito scale.

Like the actuator-in-head design? Great. That is exactly what was done with the Pixelito. Not sure what you can use for drivers though. Again, we are in the design your own electronics and program your own chips realm.

Ah, a simple one. Any kite shop. Intothewind.com or
[link=http://ecom.citystar.com/hang-em-high/ushop/]hang-em-high[/link] are ones I use.

Articles on this are online. I'll see if I can dig up a link for you.

Yes. If you want to experiemnt, start with a known good platform and go from there (like a FP micro heli along the lines of a Piccolo or Hummingbird). I think that what you are shooting for is on the level of an Olymic Gold Medalist perfomance. I am not saying that this is not a good goal. Just that you should look for more realistic steps to getting there.

Gwaihir

thanks much Vince... I have little experians with helis but I have much experiance with R/C's... I am working on my own design that is bound to work... I do need to experiment though... althouhg I am highly experianced in electronics... my design is not exactly a othentic heli but it's a start... I found a link in the Pixelito site... (where he got the motors and more from) it has prettly low prices... I know someone who creats and progams chips... I do need all the advice I can get though... it would be nice if you could send a link about the propellers.... really I don't have a budget... I'll just save up money and word with one piece at a time...

Sabot

Sorry dude but it wont work, even if you had unlimited budet, good supply of materials, lots of time and heli experice it would be a hell of a task and probably wouldnt fly better than a standard one on the market

Suggestion: buy a basic helicopter kit and modify it completely,
buy a 120degree CP upgrade for a hornet and use it for the rotor head,
build a mid-sized electric heli with a speed 600 motor - that wouldnt require such presision and lightweight materials
if your looking for a nice project you could by a kit where you have to assemble it all

if your new to helis - micro helis arnt extremely intersting that they are worth loads of time and money

Belive me; my interest is in science and engineering, i have built lots of things and i think that you would end up buying lots of expencive materials and stuff then get stuck on one minor thing and the whole progect will grind to a halt - it has happend to me many times :-( dont fall into the pit hole

Then again you might build an amasing heli and prove me completely wrong

good luck

Paris

VinceHerman

I asked the Slow Fly group if they had anything that would help. I hope this is enough...


> Inside Story Rapid prototyping in the microwave by Peter Frostick.
>
http://rcgroups.com/links/index.php?...at=232&id=4068
>
> Inside Story reshaping plastic props by Ralph Bradley
>
http://rcgroups.com/links/index.php?...at=232&id=4130
>
> Inside Story Carbon Fiber Props by Gordon Johnson
>
http://rcgroups.com/links/index.php?...at=232&id=4188
>
> Double Whammy Pennyplane article describes forming a balsa propellor
on a
> cylinder and making a pitch guage.
> http://freeflight.org/jlf/beginners_...ies/whammy.htm
>
> Direct Link to PDF
>
http://freeflight.org/jlf/beginners_...e_whammy_penny
plan
> e/dwp_article.pdf
>
> Another Pennyplane article describes forming a balsa propellor on a
cylinder and
> making a pitch guage by the Thermal Thumbers of Atlanta.
> http://www.thermalthumbers.com/Pennyplane.htm
>
>
> Blue Foam Prop Block Frame Construction
> There more info on making built up props also
> and plans for a pitch guage.
> http://www.indoorduration.com/
> Follow Links
> Go to
> Articles
> Then
> Hobby Shopper EZB Construction Guide by Larry Coslick & Steve Gardner
from
> Indoor News and Views
> Or follow this link you will be outside of the frameset.
> http://www.indoorduration.com/INAVHobbyShopper.htm
> Pages 4 and 5 of Describe prop and prop block construction.
>
> The Idiot's Guide to Prop Carving v2.02 From David Dodge
> http://www.mindspring.com/~thayer5/f...propcarve.html
>
> Carving An X Block Propellor
> http://www.keveney.com/prop2.html
> And XBlock Prop Calculators
> http://www.keveney.com/propcalc.html
>
> Carving a balsa prop
> Nice info on determining size and pitch from model size.
> By Free Flight Online
>
http://groups.msn.com/FreeFlightOnli...llnormfurutani.
msnw
>
> Del's Prop Calc Page
> Explanation of math behind pitch with a calculator.
> http://n-lemma.com/indoorrc/propcalc.htm
>
> Secrets of Indoor Props by Carl Goldberg
> From the pages of the January 1938 issue of Model Airplane News
> Provided By Kenny's Old Time Model Airplane Magazine
> http://www.arts.ualberta.ca/~idesign/jan-03/secrets.pdf
>
> For advanced math on the subject of propellor airfoils Dr. Martin
Hepperle has a
> wealth of info on model aircraft aerodynamics.
> Follow the propellors link
> http://www.mh-aerotools.de/airfoils/index.htm
>
> And one more page describing the laminated fan method.
> http://website.lineone.net/~raynes.pk.mac/makeprop.htm
>
>
> Billy

Gwaihir

jease.... thanks much Vince... you've been a big help...



Sabot: thanks for the advice.... I've decided that I will not build an accual hellicopter... but I will build my own flying divice... it's not very complicated... I will use all the information I have aquired here and use it for many different purposes...

Gwaihir

hmmmm.... I might need some more help.... I "might" go with my other solution... I might go bac to my old swash plate design... I made a really simple make it your self swash plate design... I will need a more powerful rotary or pager motor...