Flight Times

User avatar
eta150
Member
Member
Posts: 269
Joined: March 11th, 2009, 3:48 pm
Division: Grad
State: PA
Location: Kville

Re: Flight Times

Postby eta150 » March 2nd, 2010, 12:10 pm

It was pretty scary actually. Before my first flight, I broke the first motor. Then, I'm not sure how, but the horizontal stab practically broke in half, so I glued a small strip of balsa over the top of the leading edge. The venue was a deathtrap too for various reasons, like the limited space, basketball nets, elevated walkway ringing it, and netted curtain that allows a draft through. My first flight crashed into the netting, and my second one nearly did too, but one small bump on the ceiling corrected the flight path. All's well that ends well though.
#ACESWILD

jcollier
Member
Member
Posts: 49
Joined: October 24th, 2009, 6:45 pm
Division: B
State: PA

Re: Flight Times

Postby jcollier » March 2nd, 2010, 1:20 pm

Sounds like my son's adventure at States last year. No guts, no glory. Looking forward to seeing your plane on 4/30. :)

User avatar
talicoa
Member
Member
Posts: 11
Joined: October 29th, 2009, 7:44 pm
Division: B
State: IL
Location: Arlington Heights IL

Re: Flight Times

Postby talicoa » March 3rd, 2010, 6:23 am

Our team flew 2:39 for both flights last weekend at the New Trier regional in North Eastern Illinois. It was good enough for third place. The winning time was around 2:52. The Gym was very narrow, and a lot of people made contact with the walls, and backboards.

User avatar
eta150
Member
Member
Posts: 269
Joined: March 11th, 2009, 3:48 pm
Division: Grad
State: PA
Location: Kville

Re: Flight Times

Postby eta150 » March 3rd, 2010, 8:13 am

How tall was the gym?
#ACESWILD

Hamtown009
Member
Member
Posts: 17
Joined: December 25th, 2009, 9:43 pm
Division: B
State: MI

Re: Flight Times

Postby Hamtown009 » March 4th, 2010, 6:56 am

yes goblue007 is my partner for wirght stuff. We took 3rd with a 1:58 at an invitational. I think that the winning time was around 2:45 or so. The plane tends to climb nicely, turning in a normal fashion, although when the plane is coming down, it does so very quickly. My coach thought that we should use a smaller diameter rubber band and wind it more. (ex. instead of 80 winds with a diameter of .095 on a 1:16 winder, have 90 or more winds on a rubber band with a diameter of .083 on a 1:16 winder) Do you think that this would help with increasing our total time by helping it decrease in elevation slower???
2010 Events-
Wright Stuff
Bio-Process Lab
Shock Value
Pentathalon
Write it Do it
Elevated Bridge

jcollier
Member
Member
Posts: 49
Joined: October 24th, 2009, 6:45 pm
Division: B
State: PA

Re: Flight Times

Postby jcollier » March 4th, 2010, 7:12 am

It might help. How many winds are left when the plane is landing? If you are running out of winds before your plane hits the floor, then using smaller rubber might help. What you are seeing could be prop angle. Check janders posts on the threads here. He explains it better than I can.

jander14indoor
Member
Member
Posts: 1540
Joined: April 30th, 2007, 7:54 am
State: -

Re: Flight Times

Postby jander14indoor » March 4th, 2010, 2:21 pm

Here's where you are getting into the hard work!

I'd certainly try different size motors. When you do, you might also need a little more up elevator to raise the nose.

I know with the lower pitch props I like I use (from memory, may be a little off, but not much) 0.075 inch motors with 110 or so cranks on my 15 to one winder to get 3 minute flights.

Jeff Anderson
Livonia, MI

User avatar
talicoa
Member
Member
Posts: 11
Joined: October 29th, 2009, 7:44 pm
Division: B
State: IL
Location: Arlington Heights IL

Re: Flight Times

Postby talicoa » March 4th, 2010, 6:53 pm

eta150 wrote:How tall was the gym?

It was between 26' and 28' without too much hanging down. We got lucky and only tapped the beams up top a couple of times.

Hamtown009
Member
Member
Posts: 17
Joined: December 25th, 2009, 9:43 pm
Division: B
State: MI

Re: Flight Times

Postby Hamtown009 » March 4th, 2010, 7:28 pm

thanks a bunch jcollier and jander, it sounds like you guys have it exactly right. Jander, where would you recommend buying a rubber band with a diamter of .075??? We would always love and some more time on it to increase times!
2010 Events-
Wright Stuff
Bio-Process Lab
Shock Value
Pentathalon
Write it Do it
Elevated Bridge

jander14indoor
Member
Member
Posts: 1540
Joined: April 30th, 2007, 7:54 am
State: -

Re: Flight Times

Postby jander14indoor » March 5th, 2010, 3:45 am

You either strip you own rubber to whatever width you need, unfortunately this gets you into the one pricey toy I own for indoor flying, see: http://www.gryffinaero.com/models/ffpag ... arlan.html for an example and plan on spending $150. If you really get into free flight indoor, it will pay for itself, but for WS... maybe get a couple of schools to go in on it?
Alternatively you find a local nut like me as sweet talk them into stripping the rubber for you, depends on where you live on how hard it is.
Finally you can buy pre-stripped rubber at http://www.a2zcorp.us look under model supplies, indoor, rubber. He has any size you want. http://www.freedomflightmodels.com has a couple of custom sizes in the appropriate range for SO. He also has a prop pitch gage. There may be a couple of other sources out there, but I'm not sure who they'd be.

Jeff Anderson
Livonia, MI

leetx
Member
Member
Posts: 52
Joined: January 22nd, 2010, 5:40 pm
Division: Grad
State: CA

Re: Flight Times

Postby leetx » March 5th, 2010, 9:42 am

At freedom flight models, you can get custom stripped widths. There is an item called "Custom Cut Rubber - 17 gram bag". After your order it, send an e-mail to them to specify the exact size you want. I have ordered .080" from them and might order some .075" in the future.

User avatar
eta150
Member
Member
Posts: 269
Joined: March 11th, 2009, 3:48 pm
Division: Grad
State: PA
Location: Kville

Re: Flight Times

Postby eta150 » March 6th, 2010, 8:29 am

Has anyone tested with the state/nationals wing? I'm wondering if the bonuses are worth my time. I figured I'd have to fly at least 2:10 to make it worth it for states, and if anyone had achieved this. Also, I was wondering if the tail should be made smaller to fly a states wing, and if the rubber generally needs to be wider or thinner for a skinnier wing.
#ACESWILD

Greg Doe
Member
Member
Posts: 81
Joined: December 13th, 2008, 4:49 pm

Re: Flight Times

Postby Greg Doe » March 6th, 2010, 10:03 am

Eta150
Your time would be better spent working on getting another 30 or 40 seconds out of what you've
already got. While you're at it think about the numbers. If the Freedom Flight Airplane has a 15
centemeter chord, and the bonus wing is 1/2 that, you have 1/2 the wing area to support the
same 8.5 grams.(airplane and motor). Your airplane has to generate the same lift with 1/2 the
wing area! The higher wing load "bonus airplane" will have to fly faster to stay in the air, and use
up the "fuel" faster. Good luck.
Greg Doe
Smyrna, TN

User avatar
eta150
Member
Member
Posts: 269
Joined: March 11th, 2009, 3:48 pm
Division: Grad
State: PA
Location: Kville

Re: Flight Times

Postby eta150 » March 6th, 2010, 10:35 am

That is what I was thinking, but I technically don't need the same amount of lift (because of the bonus), and I think (correct me if I'm wrong) that the relationship between wing area and lift isn't linear, and I should be able to get enough lift if I use different level of curve. I also don't know how much more time I can get out of a 2:50 + plane.
#ACESWILD

leetx
Member
Member
Posts: 52
Joined: January 22nd, 2010, 5:40 pm
Division: Grad
State: CA

Re: Flight Times

Postby leetx » March 6th, 2010, 10:41 am

eta150 wrote:That is what I was thinking, but I technically don't need the same amount of lift (because of the bonus), and I think (correct me if I'm wrong) that the relationship between wing area and lift isn't linear, and I should be able to get enough lift if I use different level of curve. I also don't know how much more time I can get out of a 2:50 + plane.


Depending on the venue where you fly, planes this year can do substantially higher than 2:50. At 30' flying no touch, the freedom flight plane can do 3:45. At 25', about 3:30.

leetx
WS coach


Return to “Wright Stuff B”

Who is online

Users browsing this forum: No registered users and 2 guests