The Nerd Blog

RC Extra 300S depron airplane

2009-06-17T11:21:00.007+02:00

I have wanted to do this project in a long time, but after a serious crash with my other homemade airplane (wich you can find more about here on my blog) I have finaly been able to bend the motor shaft back in place, so the motor is now able to go fly again :D I went to http://www.rcpowers.com/ and printed out there free Extra 300S PDF sketch, about 8 pieces of paper being taped together and laid on a big square depron foam piece. I cut out the pieces and sand them down so all hingelines and straight lines would be perfectly straight and clear :) Then I glued the pieces together and taped the control surfaces to the body with clear scotch tape, and cut out some control horns out of plexiglass (transparent plastic) and wired it up with the electronics. You can find more pictures of the building process at My webalbum Flying video! http://www.youtube.com/watch?v=Mjc17f1LVp4

Brushless conversion of RC plane

2009-04-13T18:20:00.013+02:00

Now when i have flown my airplane (Protech Skyraider) for a year or so, i want to go faster and higher, so i thought, "hey didnt that guy on that RC forum talked about something called brushless motors?" and yes he did!

So now i have bought myself a BLM (BrushLess Motor) and is now working on the motormount :) I will update this blog post as i do progress, so keep watching ^^ or just subscribe via the Feed section in the sidebare to the right :)

Tech. Data on motor, batt, ESC (Electronic Speed Controler) and so on:

LiPo: What i have laying around :) some 2S 1000mAh and a single 3S 2500 wich really should fire up under the motor :D

The motor is a 2600Kv brushless motor with a Graupner 5-2" prop And a Hype ALPHA Control pro 25A ESC

Some pics of the progress

I'm making a washer out of metal to sit in the order 1. motor 2. plastic motormount 3 washer. This will prevent the motormount from cleaving, then i will see if there has to be further enhancements...

Plane is now finished and im waiting for the wind to chill a little, the BL motor seems like it REALLY is more powerfull, it can aaaaaaaaalmost lift the plane but only almost, but well, thats on the 2S LiPo (7.4V.) i have a 3S (11.1V.) but i dont know if i dare putting that one on, without makeing the motormount stronger :)

Water rocket

2009-04-13T17:47:00.002+02:00

Last year i started making water rockets, that is the absolute funniest, educational, inexpensive nice thing i have ever done :D Just wanted to leave text message i send to a guy im helping with a science project about water rockets, there may be something you will find interesting, if you havnt builded a rocket yet, read my text and GET TO THE BLUEPRINTS :D Hi again, just to say what you need is kinda difficult... um, but i will try, i will also be adding links to videos/pictures i will find usefull for you to see :) Well, ofcourse you need bottles ;) Find the big 2litres ones in thin plastic like this one (http://www.americansweets.co.uk/ekmps/shops/statesidecandy/images/copy_of_aAw_2_litre_root_beer.jpg)You can choose to just use one bottle pr. rocket, or you can connect more of them together like Air Command Rocket (ACR) does... if you go watch their video (http://home.people.net.au/~aircommand/day54.htm) you can do like so, and then you take two bottlecaps and drill a hole through them, and glue them together, remember to always sand where you want to glue, they are gonna hold a hell lot of pressure!! Anyway, make some fins out of cardboard, you can stiffen them up with something like skewer sticks or something you find usefull :) for nosecones you can really let your imagination control, cuz there are TONS of different ways to do it, i prefer to use cutted off bottle tops (cut off the top of a bottle...) and just tape it to the rocket... you could choose to just fold some out of cardboard though, but that is up to you :) Now the big deal: the Nozzle :OThis is the most important thing on the rocket!!! and sadly enough sometimes also the one that causes most trouble :P hmmm.. you know, if you just use the nozzle wich is on the bottle (like the picture of the two litre bottle) the water will get kinda rushy when it is on its way out.... dont know if you know what i mean xD but if you use a type like the one to the far right side:(http://www.3part.com/Files/Billeder/Industrial%20Design/egekilde_th_1.jpg) instead, the water will be guided out gently and produce, signifigant more thrust than the other.... i have succesfully launched such a thing in the air about 120metres i would guess!!! MAN i tell you, that was extreme! :D and only that little 1.5 litre bottle! though i may have overkilled a little, when i pressurised it to almost 11bars !!! xD That thing kicked ass :)Anyway, ahh nice memories from last year xD, well back to buisness:ACR use Gardena water hose fittings, i really wanna do that too but i just cant get the glue to stick properly, since we have another type of them here in Denmark... if you check out their website they have a section called nozzles, very nice info there... Then the lauch system, eewww this is badass braintwisting! there are tons of different designs out there, i would suggest you to look at these ones:http://home.people.net.au/~aircommand/construction.htm#Launcher - this is what i use, just with a few tweeks...This one is a very good tutorial http://www.youtube.com/watch?v=7bpFsoaOLTM REMEMBER to see part two! link in description bar to the right :) if you follow his steps you CANT go wrong, it is SO easy to understand! :D So, do that, deffenetly choose the last one, it is REALLY good! :) That will be it for now, feel free to ask even more questions xD im always open for ideas and questions :) But please, dont leave them as a comment here on the blog, email me them, i would apreciate that, just make the subject "Blog" :)

Stary night

2009-02-28T16:12:00.002+01:00

I went outside and saw up in the big dark heaven, i have been inside for a long time, so my "nightvision" wasnt that good, but after a while outside waiting for my viseion to go into -darkness mode- i prepared our Nikon D80 by setting the ISO way up high (unfortunatly that makes the pictures a little blury and pixelated, but it catches much more light) the appature low (means the lens opens up much, and high appature mean it opens up a little - which all in all makes the picture more or less bright, cuz of the added or missing light to the photocell) and then, to pimp it all up (uhhh i love this word) Long Expo :D which does it all for you, instaed of your camera says "snap" and you got a picture, you set it to like 30 secs and then your camera says "snaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaap" you know what i mean? if not? Google is your friend ;)

Here are, only, 3 pictures, but i will add more as the heaven gets darker in the evening time :)

Shaky this one :/

Oh i like this one :) And i got a plane on the picture, kinda cool i think :D

I also really like this one :)

Six in One

2008-12-09T20:24:00.003+01:00

6 1.5 v. batteries out of a single 9v. batteri!

!!!DISCLAIMER!!!

I do now know which batteri you are gonna use, it may NOT be the same as mine, and therefore i don't know if it will leak acid or other nasty things if you try to open it! Please WARE SAFTY GOGGLES AND GLOVES! AND DO THIS PROJECT OUTSIDE! Apart from that, lets get started :)

In this little How to, I will show you how to get 6 small 1.5v. batteries, out of one big 9v.

1 Start by taking a 9v. batteri like this one:

Then you need to get some working tools, like this one: 2 Take your 9v. bat. and start wraping the metal off (it's easier by starting at the top) it may take some time, but when you have wraped off the top, you should get something like this (the picture shows another type of battery, but it dosn't matter as long as it is a 9v.) 3 Pull out the 6 small batteries, they may be sticked toghether with some metal, winding them up in series, take that off too. 4 CONGRATULATIONS! you now have 6 small 1.5v. batteries to use in your own creations.

R/C Hovercraft

2008-11-26T13:11:00.003+01:00

One day, from long time ago, i saw a TV program called "Nørd" In english: Nerd/Geek :) They made a so called "hovercraft" and from that day, I have been interested in them...

I started thinking of how i could build my own, but radio controlled (R/C). I came up with some different ideas and one of them -indeed- was really good:) I've uploaded a video to youtube, so you can see that it's actualy working! =>

http://www.youtube.com/watch?v=pnm2h--FOFA

And http://www.youtube.com/watch?v=xs_A_XeSwS0 for some closeups. Im using Graupner Speed 400 motors for propulusion and lift, and LiPo batteries (one 2s1000mAh [the red one] and another which isnt in these videos a 2s750mAh [green one] )

New plane :)

2008-11-17T21:08:00.003+01:00

Today i finaly received my rc glider delta wing :D

Nothing much to say for now, im happy :)

Maybe i'll post some details about it, else feel free to send me an email.

pics->

Homemade RC plane #3

2008-10-08T18:08:00.003+02:00

Ok, if you havn't read my other posts about my homemade rc airplane, i would advice you to do so.

This is hopefully the final edition, or... at least i'm getting closer :) The Rudder is smaller, i've added a stabiliser tale, and made some minor repairs. But the biggest difference is, that i have made the wing V-formed instead of just a flat wing, this should improve the stability great, and it does, i made a little test run, and it is much more stable... But is it stable enough? Only time will know ;)

Pictures will be added soon!

Homemade rc plane #2

2008-10-08T17:59:00.002+02:00

A little update:

In version #2 the only real differens is, that i switched the BL (BrushLess) motor out with a brushed one.

The motor is a Graupner Speed 400, rest of the setup is the same as before...

I test flew it... And it crashed the ruder was WAY too big, it swinged (swong, swang???) from side to side as i tried to controlle it, but it crashed.

Back to the blueprints.

Homemade rc airplane

2008-08-10T10:20:00.015+02:00

Today, I thought about building my own rc airplane, and 5 minuts later..... Was the work in progress :)

Specs. Weight with LiPo 2S 800mAh. 301 grams. Weight without LiPo. 253 grams. Brushless outrunner setup with Graupner 18-12 or 7-5" prop. (18cm long by 1.2cm wide. Same principle with 7-5") Motor thrust almost 200 grams. on the 2S. A 3S would be better. Motor itself NOT included.... Recevier: Hitech HSF-05MS Servo: Micro servos Batteri: LiPo 2S 800mAh (could be switched out with a 3S for even more power)

Homemade wing, idear from http://webx.dk/rc/depron.htm with some of my own twists...

tail: EPS (flamingo.) Rudder: balsa tree. Elevator: 3mm. depron .

Body: Rocket stick.

I testflew it... The torq was very big, as i was aware of, and it was hard to controll, but it was flyable :)... untill the wind forced it to go upwards, and when i tried to turn it, it all just went too fast and CRASHHH!!!!!£$££}][{%&/)(=&%\<>!CRAkBooM it broke :'( Unfortunatly nothing was damaged, but i took it apart enyways... maybe i'll build another one sooner i later :) keep your eyes open! pics->

My Chili plants

2008-04-15T09:04:00.065+02:00

This blog is a little different than others, it will be updated as my chillies grow, and i will therefor be posting news about my chilies when i think it is time for an update, untill they are eatable :)

For about 3 years ago, i started growing chilies. We (me and my aunt, the super chili grosers) went to our local supermarket, and bought a little bag with chili seeds in it. We planted them and after 2 weeks or so, they began to sprout. In this blog post, I will follow them from small sprouts to BIG SPICY HOT CHILLIES :-) Every year since then, me and my aunt has planted the seed's from the chilies again and again, and every year, we get about to full of thees (see pic.) from just 3 plants. The size of the glass cannister is about 20*10*10 It may not seem as much, but I can ensure you about, that one third of a chili, is enough for 5 people, if you make some delicius chinese rise food thing. This year, we wanted to try some new stuff, so when i became 15 i got a little scrap book, filled with chili seeds. We have planted 4 kinds of chilies, 1-4 "Bolivian rainbow" 1-4 "White Habanero" 1-4 "Flouresent purple" and 3 of my good old normal chilies.

You can click on every picture in this blog to enlarge it Yeasterday they began to sprout, so here is a cuple of pics.

I use small flags to know which plant is what

April 27 My good old chillies is realy growing fast :) and the Flouresent purples are also caching up. The others had all began to sprout, some faster than others, but soon i need to put them, in some individual pots, so the roots dosn't begin to grow into each other... time for some pics :)

May 12

The big transfer, from small pots to bigger ones :) I have replanted my chilies into some bigger pots, then they will grow better and it's also 1. stage to put them in my greenhouse...

My chilies ready for being replanted

May 23 GREENHOUSE HEYA :D Today is the day i re-replanted my chilies :) now they are in my greenhouse and they feel realy good, My Flouresent Purpels' leafs are starting to become "flavouriced" (if that is a word? :) But one bad thing is, that i can't get my White habaneros to sprout :'( so i don't realy know what i should do, i will try calling the man i got the seeds from, he has a little shop where you can buy all sorts of chilies :) hmmm i will try that.

July 16 First flowers Now, after a long brake, im back again with new updates: FLOWERS :D

Click on the pictures to enlarge them to see the flowers, my pic's get kinda pixely?

A picture says more than 1000 words.......

August 7 More flowers........ and CHILIES :D

Today i went to my greenhouse to water the plants (as usual) and i saw if there where eny chillies, and there where!

Pictures -->

August 25

My greenhouse is going chiliadelic! there are chilies everywhere :D My Flouresent Purples is getting more and more flowers, and so far, iv'e counted 7 small chilies :-)

Oktober 31

My good old chilies has now 2 RED chilies :D I'm so happy!

But to every good news, there is (sometimes, not allways...) a bad one. The winter is sneaking in over my greenhouse, and it's getting colder and colder :( So i realy have to keep an eye on them, else here's some pictures :)