Helicopter Testing

WCarneyJX
Member
Member
Posts: 22
Joined: February 2nd, 2011, 2:45 pm
Division: C
State: FL

Re: Helicopter Testing

Postby WCarneyJX » March 6th, 2011, 11:50 am

Do you mean aluminum tubing with wire hooks? If so, you can wrap the tubing with some thread and glue but you have to consider the weight of doing so. also consider it probably wouldn't have come loose except for the crash...
River City Science Academy - Florida 2010 Wright Stuff Champs
Coach for:
Storm the Castle
Helicopter

"My kid and my latinum go to Starfleet Academy"

User avatar
chia
Member
Member
Posts: 558
Joined: January 13th, 2009, 5:09 pm
Division: Grad
State: IL
Location: Derse

Re: Helicopter Testing

Postby chia » March 6th, 2011, 4:52 pm

Nope, it's a bent aluminum metal hanger (not the best method, but what I have available at the moment). Either way, I reinforced it with thread, like you mentioned (it was underweight anyway).
(avatar is by xamag)
Favorite events: Anatomy, Microbe Mission, Ornithology, Circuit Lab, Helicopter
NCHS '13
==>

jander14indoor
Member
Member
Posts: 1560
Joined: April 30th, 2007, 7:54 am

Re: Helicopter Testing

Postby jander14indoor » March 7th, 2011, 3:52 am

Where's the balance on this new copter? You want the center of gravity to be low to help stabilize it. To high and you'll get wandering like that.

Jeff Anderson
Livonia, MI

User avatar
kjhsscioly
Exalted Member
Exalted Member
Posts: 517
Joined: January 16th, 2009, 11:55 am
Division: Grad
State: IL
Location: Chicago

Re: Helicopter Testing

Postby kjhsscioly » March 15th, 2011, 3:21 pm

I don't have the copter with me, but it should be low, we added clay at the bottom

thewinner
Member
Member
Posts: 110
Joined: March 18th, 2011, 12:18 pm
Division: B
State: NJ
Location: TGMS FTW

Re: Helicopter Testing

Postby thewinner » March 18th, 2011, 6:50 pm

And for stability, the top rotor needs to generate more lift than the lower. Try fiddling with the pitches of the rotors and see what works best.
I win.

User avatar
lllazar
Member
Member
Posts: 839
Joined: November 19th, 2009, 7:20 pm
Division: C
State: IL
Location: Probably at my laptop, multitasking while on AJAX chat....

Re: Helicopter Testing

Postby lllazar » March 18th, 2011, 7:10 pm

My copter's fine on stability now but i still can't seem to keep it up in the air as long as i'd like. It's still wavering around 1:40 flight times, after i changed the pitch around a few times. Gah, if i could just get more lift for longer, im sure i could easily break 2:00 with the number of winds im putting in....
2011 Season Events~

Fossils (Regionals ~1st) (State ~6th)
Towers (Regionals ~1st) (State ~3rd)
Helicopter (Regionals -3rd gahhh) (State ~5th)
Wind Power (Regionals ~1st) (State ~3rd TIERED!)

Hooray for getting everything i wanted?

User avatar
illusionist
Member
Member
Posts: 942
Joined: March 20th, 2010, 4:13 pm
Division: C
State: MI

Re: Helicopter Testing

Postby illusionist » March 18th, 2011, 7:20 pm

And for stability, the top rotor needs to generate more lift than the lower. Try fiddling with the pitches of the rotors and see what works best.
From what I've heard (from multiple people), the lower rotor should be at a higher pitch. I think there is a discussion on that somewhere in the Helicopter threads.
2012-2013 Building Event Captain
Rule 7d. "Event Supervisors are allowed to break any competitors' devices" -bearasauras

thewinner
Member
Member
Posts: 110
Joined: March 18th, 2011, 12:18 pm
Division: B
State: NJ
Location: TGMS FTW

Re: Helicopter Testing

Postby thewinner » March 19th, 2011, 6:51 am

And for stability, the top rotor needs to generate more lift than the lower. Try fiddling with the pitches of the rotors and see what works best.
From what I've heard (from multiple people), the lower rotor should be at a higher pitch. I think there is a discussion on that somewhere in the Helicopter threads.
I think that's because when the lower rotor is at a higher pitch, it increases it's drag, therefore making the top rotor spin faster and produce more lift.
I may be terribly wrong, though.
I win.

User avatar
mrsteven
Exalted Member
Exalted Member
Posts: 815
Joined: March 13th, 2011, 5:40 pm
Division: C
State: IL
Location: UIUC (Formerly BGHS)

Re: Helicopter Testing

Postby mrsteven » March 24th, 2011, 12:56 pm

My copter's fine on stability now but i still can't seem to keep it up in the air as long as i'd like. It's still wavering around 1:40 flight times, after i changed the pitch around a few times. Gah, if i could just get more lift for longer, im sure i could easily break 2:00 with the number of winds im putting in....
what design are you using? double rotor with 1 fixed? Rubber width?
^^ all stuff that can effect it.
(and just for my curiousity I saw you were also from IL, what team are you on?)
2011 Helicopters State Runner-up
2012 Helicopters State Champion
2013 Robot Arm State Champion

User avatar
aubrey048
Exalted Member
Exalted Member
Posts: 270
Joined: January 8th, 2010, 9:43 am
Division: C
State: AL
Location: Rocket City

Re: Helicopter Testing

Postby aubrey048 » March 24th, 2011, 1:17 pm

I've got a double rotor with one fixed. It worked pretty well for us, more predictable than double free-spinning rotors.

What kind of lubricant did you all use? (Just wondering. We used Armorall)
Plotting the function of the universe for efficiency without your permission.

Projected 2011-2012 Events: Anatomy, Microbe Mission, Disease Detectives, Tower, Optics, Helicopter.
Past Events: Anatomy (7th), Helicopter (6th), Mission Possible (1st), Write It Do It (4th, 8th), Ornithology (5th).


Return to “Helicopters C”

Who is online

Users browsing this forum: No registered users and 1 guest