Problems with flight lift

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Problems with flight lift

Postby sciolywin » February 8th, 2019, 6:40 am

After decreasing the weight of my plane, changing the angle of attack, and adding clay to change the center of gravity, I have not been able to adjust my plane so that it has enough lift to go up as opposed to going down. I am not sure of what else to do. Any ideas?
Also, I have noticed that during flight, my plane is very unstable, but I am not sure of how to fix this. Thank you all!

User avatar
CrayolaCrayon
Member
Member
Posts: 183
Joined: October 25th, 2017, 8:24 am
Division: C
State: PA
Contact:

Re: Problems with flight lift

Postby CrayolaCrayon » February 8th, 2019, 11:12 am

Can you give more info? What torque are you launching at? If you give really specific details, BJT can give you very specific and helpful feedback.
"Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln

Image

User avatar
klastyioer
Member
Member
Posts: 326
Joined: April 22nd, 2018, 4:46 pm
Division: C
State: PA

Re: Problems with flight lift

Postby klastyioer » February 9th, 2019, 2:03 pm

sciolywin wrote:After decreasing the weight of my plane, changing the angle of attack, and adding clay to change the center of gravity, I have not been able to adjust my plane so that it has enough lift to go up as opposed to going down. I am not sure of what else to do. Any ideas?
Also, I have noticed that during flight, my plane is very unstable, but I am not sure of how to fix this. Thank you all!


wdym by unstable
can you provide rubber thickness, length, mass, any wing posts info, and prop info
honestly, it's not about the medals. go out there and have fun. make progress, learn a few things, have one heck of a time, because that's all that matters.
---
Member of the Builder Cult >:)

User avatar
CrayolaCrayon
Member
Member
Posts: 183
Joined: October 25th, 2017, 8:24 am
Division: C
State: PA
Contact:

Re: Problems with flight lift

Postby CrayolaCrayon » February 9th, 2019, 8:15 pm

klastyioer wrote:
sciolywin wrote:After decreasing the weight of my plane, changing the angle of attack, and adding clay to change the center of gravity, I have not been able to adjust my plane so that it has enough lift to go up as opposed to going down. I am not sure of what else to do. Any ideas?
Also, I have noticed that during flight, my plane is very unstable, but I am not sure of how to fix this. Thank you all!


wdym by unstable
can you provide rubber thickness, length, mass, any wing posts info, and prop info


He told me .81, which seems rather thin. I'm thinking they try a .094 just to see how it goes.
"Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln

Image

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Re: Problems with flight lift

Postby sciolywin » February 10th, 2019, 4:26 pm

I did about a .108 thickness motor with 80ish winds using a 15:1 winder and improved my flight time to about 1 minute, but I think lift is still a problem. I have my front wing at its maximum angle of incidence too. Any ideas? My goal is to get it to around 2-3 minutes by the end of this week. Thank you everyone!

User avatar
klastyioer
Member
Member
Posts: 326
Joined: April 22nd, 2018, 4:46 pm
Division: C
State: PA

Re: Problems with flight lift

Postby klastyioer » February 10th, 2019, 4:40 pm

sciolywin wrote:I did about a .108 thickness motor with 80ish winds using a 15:1 winder and improved my flight time to about 1 minute, but I think lift is still a problem. I have my front wing at its maximum angle of incidence too. Any ideas? My goal is to get it to around 2-3 minutes by the end of this week. Thank you everyone!


what about your stabilizer posts, that might be the problem.
honestly, it's not about the medals. go out there and have fun. make progress, learn a few things, have one heck of a time, because that's all that matters.
---
Member of the Builder Cult >:)

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Re: Problems with flight lift

Postby sciolywin » February 10th, 2019, 4:45 pm

The front wing has its maximum angle of incidence, and the horizontal stabilizer is flat. The distance between the horizontal stabilizer and wing are close to a maximum as well. The tilt on the front wing is around 5* to the left, the direction in which I wanted the plane to spin.

User avatar
klastyioer
Member
Member
Posts: 326
Joined: April 22nd, 2018, 4:46 pm
Division: C
State: PA

Re: Problems with flight lift

Postby klastyioer » February 10th, 2019, 4:49 pm

sciolywin wrote:The front wing has its maximum angle of incidence, and the horizontal stabilizer is flat. The distance between the horizontal stabilizer and wing are close to a maximum as well. The tilt on the front wing is around 5* to the left, the direction in which I wanted the plane to spin.


wait wait
wdym by tilt on the front wing
honestly, it's not about the medals. go out there and have fun. make progress, learn a few things, have one heck of a time, because that's all that matters.
---
Member of the Builder Cult >:)

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Re: Problems with flight lift

Postby sciolywin » February 10th, 2019, 4:55 pm

I tilted the front wing in the direction that I wanted it to spin. So it is spining towards the left and my left is angled down while the right is up.

User avatar
CrayolaCrayon
Member
Member
Posts: 183
Joined: October 25th, 2017, 8:24 am
Division: C
State: PA
Contact:

Re: Problems with flight lift

Postby CrayolaCrayon » February 10th, 2019, 4:56 pm

sciolywin wrote:The front wing has its maximum angle of incidence, and the horizontal stabilizer is flat. The distance between the horizontal stabilizer and wing are close to a maximum as well. The tilt on the front wing is around 5* to the left, the direction in which I wanted the plane to spin.


I think you should level the wings, and add Wash-in. There are instructions to do that in the FF 2019 booklet.
"Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln

Image

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Re: Problems with flight lift

Postby sciolywin » February 10th, 2019, 4:57 pm

What is wash-in?

User avatar
CrayolaCrayon
Member
Member
Posts: 183
Joined: October 25th, 2017, 8:24 am
Division: C
State: PA
Contact:

Re: Problems with flight lift

Postby CrayolaCrayon » February 10th, 2019, 5:00 pm

sciolywin wrote:What is wash-in?


Strategic warpage in the wing to tighten the turn circle.
"Better to remain silent and be thought a fool than to speak out and remove all doubt." - Abraham Lincoln

Image

User avatar
klastyioer
Member
Member
Posts: 326
Joined: April 22nd, 2018, 4:46 pm
Division: C
State: PA

Re: Problems with flight lift

Postby klastyioer » February 10th, 2019, 5:03 pm

CrayolaCrayon wrote:
sciolywin wrote:What is wash-in?


Strategic warpage in the wing to tighten the turn circle.


theres a guide on jeff andersons (i think its from him) guide on the soinc website
u basically warp the wing so the front left side is further down towards the ground than the right side
and in the back the right side is lower than the left (looking from the front)
honestly, it's not about the medals. go out there and have fun. make progress, learn a few things, have one heck of a time, because that's all that matters.
---
Member of the Builder Cult >:)

sciolywin
Member
Member
Posts: 8
Joined: February 8th, 2019, 6:13 am

Re: Problems with flight lift

Postby sciolywin » February 10th, 2019, 5:04 pm

Do you have a link of some sort for this guide? I think I know what you are talking about but am not completely sure if it's the right page or not.

User avatar
klastyioer
Member
Member
Posts: 326
Joined: April 22nd, 2018, 4:46 pm
Division: C
State: PA

Re: Problems with flight lift

Postby klastyioer » February 10th, 2019, 5:07 pm

sciolywin wrote:Do you have a link of some sort for this guide? I think I know what you are talking about but am not completely sure if it's the right page or not.

uhh ye sure gimmie a sec
https://www.soinc.org/sites/default/fil ... iad5.0.pdf
honestly, it's not about the medals. go out there and have fun. make progress, learn a few things, have one heck of a time, because that's all that matters.
---
Member of the Builder Cult >:)


Return to “Wright Stuff C”

Who is online

Users browsing this forum: No registered users and 0 guests