Re: n900Fly - An irresponsible app for the n900
 

The acceleration is constant. The velocity changes. At the top of an arc, the velocity is zero, but it begins to fall due to the constant acceleration. 9.81 meters per second towards Earth. Basic physics, here.

Sorry, just being really anal about technicalities here.

Re: n900Fly - An irresponsible app for the n900
 

I need a facepalm on the double...

http://img189.imageshack.us/img189/2...cepalmk.th.jpg

because your idea was already addressed at least twice in this thread:

Re: n900Fly - An irresponsible app for the n900
 

If the velocity changes the acceleration cannot be constant. Thats the very definition of acceleration, acceleration means how the speed changes in time.
Youre right, at the top of thearc velocity is zero, but the phone has accelerometers, not velocimeters. So at the top of the ark, i think the accelerators in the phone detect 0 acceleration. I don't know exactly how they are build and what exactly are detecting but i think my reasoning is correct.

Re: n900Fly - An irresponsible app for the n900
 

There is wrong and there is VERY WRONG;
Your reasoning is VERY WRONG.
Dou you have a n900? can you please use the accdisplay app? (on extras-testing now).

Yes, I agree with you. That's why since version 0.9 the "Hello ****ers" is out.

Really, a PORTRAIT MODE on this app won't help much since it will be switching portrait-landscape-portrait-landscape during "take-off" and specially during landing and thus eating lots of CPU and then probably messing up with the time readings (start & end).

App is in going to extras-testing this afternoon.. please give it some thumbs up!

Re: n900Fly - An irresponsible app for the n900
 

Please show your record )) . My record is about 4m but I dont want to try more

Re: n900Fly - An irresponsible app for the n900
 

Man! My record is about 1.9 (indoors) and that's totally enough for me!
I could do waaaay better with my 3410 but those were other times.

Re: n900Fly - An irresponsible app for the n900
 

Hey everyone.. app on extras-testing now... please test and vote..:
http://maemo.org/packages/package_instance/view/fremantle_extras-testing_free_armel/n900fly/0.1.4

Also.. check accDisplay:.. also on testing.. =] vote!

Thanks anyway..

Re: n900Fly - An irresponsible app for the n900
 

feature want! :d

Re: n900Fly - An irresponsible app for the n900
 

That's the surprise for V. 2...

Re: n900Fly - An irresponsible app for the n900
 

It seems that I cannot reply in the downloads website: http://maemo.org/downloads/product/Maemo5/n900fly , so I will comment here about problems with n900fly.

I installed the program, started it and threw my n900 in the air couple of times (1-2 meters). Nothing happened. All numbers still 0.0 after the throw. Rebooted N900 and tested again. Still nothing. Installed AccDisplay to make sure that accelerometer works. Accelerometer seems to work.

Re: n900Fly - An irresponsible app for the n900
 

LOL you need to go back to freshman physics class :p

I'll leave it as an exercise to the reader to figure out what is wrong with the quoted statement ;)

Re: n900Fly - An irresponsible app for the n900
 

Citius. Altius. Fortius. This app is great. We could have an N900 Olympics. Who can throw it farthest, highest, most time in the air? Combine it with some protective cover, and you've got the marketing taken care of.

Re: n900Fly - An irresponsible app for the n900
 

I did some more testing. Noticed finally that my accelerometer was giving somehow wrong information. After reseting it (remove the battery for couple of minutes), n900fly started to work :D The app seems nice and I am having quite fun with it. Sorry about the one star in the download site, but the site does not seem have option to change rating.

Re: n900Fly - An irresponsible app for the n900
 

No prob "Petteri",
Just say so there..
Weird this acc bug on your device.. but anyway.. if it's gone... it's gone.
Enjoy!

Re: n900Fly - An irresponsible app for the n900
 

hi,
this is a great app, i've been doing some testing with it and noticed a few issues iwth its flight detection algorithm
i have been using liqacceltests to graph the flights and accelerometer variables and for have some ideas why detection is a bit wrong.
(it seems to get more 0.04s 1cm type throw ranges than actual decent ones)

btw personal best with your app 1.31m, wheres the global high score table ;)
wrapping n900 inside sleeping bag case provides good protection, but your app doesnt detect the flight correctly.
we were throwing unprotected so hard last night it hit the roof o_O thats when i started wrapping it.

Re: n900Fly - An irresponsible app for the n900
 

Well, just for the sake of completeness (physics):

I agree with the statement: "But only if the measurment begins late:

If there was only constant acc towards earth, the N900 would never be able to get away from it.
There is a time when there is acc in the opposite direction of earth and ( oppositeAcc - g (9.81m/s) > 0 ) ----> the throw. (simplified)
Therefore, the acc is not constant, if my measurment begins with the throw.

You are welcome to discount this.


Is this already used to initiate the App?

Re: n900Fly - An irresponsible app for the n900
 

1.52 ;) On my bed...

Re: n900Fly - An irresponsible app for the n900
 

2.51m :eek:
on the stairs.

(whole sleeping bag round it)

Re: n900Fly - An irresponsible app for the n900
 

You actually mean 9.81 meters per second per second as g = acceleration, velocity change/time and, excuse me, whoever post and quote "9.81 m/s" suggest time to go back to physics 101.

I have so much fun with this app, keep up the good work. Thanks.

bun

Re: n900Fly - An irresponsible app for the n900
 

- you could make the "hello f***ers" message an easter egg with a key combination

- to get the photo at the highest point, you can make a video and extract the frame at (flight-time)/2 (assuming you catch the phone at the same height it left your hands).. :)

Re: n900Fly - An irresponsible app for the n900
 

hahhahha!! nice idea for a easter egg..
Video/photo comes for version two..
(or if anyone feels like doing, go for it..)

About the "flight" detection, it is VERY VERY simple! I'm totally positive we can do better.. but it was just not that necessary for the first public version..

Re: n900Fly - An irresponsible app for the n900
 

And when can we expect a GPS version which can tell us how far we can throw it?

:)

I also wonder what fancy stuff could be recorded during a rollercoaster ride? Could we collect information from various rollercoasters around the globe and compare the thrill??

Re: n900Fly - An irresponsible app for the n900
 

1.53 meters and counting. I'm afriad of trying anything more, untill my next contract upgrade anyway.........

Re: n900Fly - An irresponsible app for the n900
 

It's frivolous, fun apps like this that give someone else an idea for a serious application. ;)

Re: n900Fly - An irresponsible app for the n900
 

This is the best idea from for an app yet, from anyone. vreate a 'peer review app' with respositorys for subject type. Subject experts sign up to repositorys via FTP and are notified of new deposits to peruse at their liesure.

Of corse, we could just set up 3 public flckr accounts called 'animal' 'vegitable' 'mineral' and upload stright to them ;)

Re: n900Fly - An irresponsible app for the n900
 

It's a bit hard to understand the "relative to free fall" bit of accelerometer readout definition.

Just think of it as sum of all the forces applied to the N900 case - not including those that will cause rotation. And the reading is the inverse vector actually.
Also a spinning device most probably will create bogus readings

n900fly
 

on a lighter side of the N900
while looking through the apps in the aplication manager i came across

App name "N900fly"
App Description "Uses the accelerometer to measure how high you can throw your N900"

what gets me in a funny kind of way is who on earth would throw their n900 in the air just to catch a meter reading ?

how accurate is the measurement in relation to how high you throw your N900.... could it accurately read a thrown height of 150ft, did the programmer check for this. whats funnier is the application also keeps track of your best score. :D:D:D


CN :p

Re: n900fly
 

I'm planning to attach my n900 to a model plane and fly in a parabolic arc. Beat that!

Re: n900fly
 

i seen it i thote the same...who the hell wud throw their n900,but then i downloaded it n throw it a couple of times just to see the meter reading...i havent dropped it yet lol

Re: n900fly
 

my record is 0.73 meters :D

i did this over my bed and i didnt dare throwing any higher.

Re: n900fly
 

6.42 metres in my garden. i am both brave and stupid and also put a lot of trust in my phone case

Re: n900fly
 

At that height I'm sure your phone case would have broken as well. Just be glad you can catch.

Re: [Maemo 5] n900Fly - An irresponsible app for the n900
 

The thread "n900fly" with six posts has been merged into this thread.

Re: [Maemo 5] n900Fly - An irresponsible app for the n900
 

I think he made that app on hindsight knowing that the n900 is going to fall flat on its face so the best thing and only thing left to do is use it as a throwable paperweight lol. ooooer lol.

Re: [Maemo 5] n900Fly - An irresponsible app for the n900
 

You're trying too hard.

Re: [Maemo 5] n900Fly - An irresponsible app for the n900
 

This is the most humorous, coolest app I've ever seen in mobile world. Kudos to cpscotti.

DISCLAIMER: I won't tell my friend I've this app installed. Sorry dude.

Re: [Maemo 5] n900Fly - An irresponsible app for the n900
 

And your not trying enough :p LOL.