Wright Stuff C

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CookiePie1
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Re: Wright Stuff C

Post by CookiePie1 » March 2nd, 2020, 11:57 am

jinhusong wrote:
March 2nd, 2020, 11:55 am
The PPP is fun. I heard that Lynbrook's parachute got lucky up-wind, and just going higher and higher, they cannot see it anymore, so called it stop at 5 minutes.
now that...sounds like norcal lol
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Re: Wright Stuff C

Post by jsegal » March 3rd, 2020, 3:47 pm

Can someone help me determine what would be better. 36inch loop of .058" rubber with a pitch to let it almost run out of winds or a 42inch loop .079" rubber with a pitch to let it almost run out of winds. Right now I'm getting around 1:10-1:20 in a 20ft ceiling with the 42inch loop of .079" rubber with a pitch of 50 degrees.

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Re: Wright Stuff C

Post by IvanGe » March 3rd, 2020, 3:56 pm

accident
gelinas 2016-2019, wmhs'22

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Re: Wright Stuff C

Post by bjt4888 » March 3rd, 2020, 4:32 pm

jsegal wrote:
March 3rd, 2020, 3:47 pm
Can someone help me determine what would be better. 36inch loop of .058" rubber with a pitch to let it almost run out of winds or a 42inch loop .079" rubber with a pitch to let it almost run out of winds. Right now I'm getting around 1:10-1:20 in a 20ft ceiling with the 42inch loop of .079" rubber with a pitch of 50 degrees.
JS,

This is the essence of the problem. My team’s process is to have several propellers at the start of the year each with different blade pitch and also possibly different blade shape and flaring and non-flaring possibly. We then test all propellers with various density and length rubber motors. Testing incrementally and keeping good data (longer flights, reasonable launch torque good flight profile w/ reasonable climb rate and focus on improving cruise and let down phases of flight and reasonable turns remaining are usually good indicators that you’re moving in the right direction).

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Re: Wright Stuff C

Post by jimmychang0416 » March 3rd, 2020, 5:17 pm

I am currently having problems with trimming the plane for a small room. Our next competition is in a place where the area is 45' by 45' and the height of the room is about 25'. Our current plane seems to turn too wide for the room and whenever we increase the angle of the rear stabilizer, the plane can't maintain it's climb and starts diving down after a few seconds. We've also tried increasing our lift on the front wing but it stalled out. We are using the Freedom flight kit with the standard rubber that it came with and we are running a monowing design. Can someone help me??

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Re: Wright Stuff C

Post by CookiePie1 » March 3rd, 2020, 6:12 pm

If by diving you mean a sharp increase in bank angle and then a dive, maybe use some washin? Look for the shim paragraph in the instructions.
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Re: Wright Stuff C

Post by bjt4888 » March 3rd, 2020, 6:15 pm

jimmychang0416 wrote:
March 3rd, 2020, 5:17 pm
I am currently having problems with trimming the plane for a small room. Our next competition is in a place where the area is 45' by 45' and the height of the room is about 25'. Our current plane seems to turn too wide for the room and whenever we increase the angle of the rear stabilizer, the plane can't maintain it's climb and starts diving down after a few seconds. We've also tried increasing our lift on the front wing but it stalled out. We are using the Freedom flight kit with the standard rubber that it came with and we are running a monowing design. Can someone help me??
When increasing rudder offset it is usually necessary to also increase “wing twist” or washin. Twist so that the inner wing panel trailing edge is lower than the leading edge by at least 1/8” and possibly more. The Freedom Flight kit accomplishes this twist by inserting varying thickness shims between the wing mount and the fuselage.

A 45 x 45 ft room is not big enough to attempt to climb to a 25 ft ceiling without risking drift into a wall if there are any air currents. In a room this size, my teams would deliberately fly low, maybe 15 ft.

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Re: Wright Stuff C

Post by scandium21 » March 6th, 2020, 10:28 am

Would it be a violation of the spirit of the competition to build a Wright Stuff plane that is simply a ball and a rubber band. Our JV team is in a little bit of a pickle and does not have a good plane for regionals tomorrow. Could we throw together an 8 gram ball and chuck it as high as possible, or will the ES hit us with the spirit of the competition rule? This is a serious question.
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Re: Wright Stuff C

Post by CrayolaCrayon » March 6th, 2020, 10:46 am

scandium21 wrote:
March 6th, 2020, 10:28 am
Would it be a violation of the spirit of the competition to build a Wright Stuff plane that is simply a ball and a rubber band. Our JV team is in a little bit of a pickle and does not have a good plane for regionals tomorrow. Could we throw together an 8 gram ball and chuck it as high as possible, or will the ES hit us with the spirit of the competition rule? This is a serious question.
The plane should be solely powered by the rubber band after release? I've never thought about it like this.
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Re: Wright Stuff C

Post by bjt4888 » March 6th, 2020, 11:11 am

CrayolaCrayon wrote:
March 6th, 2020, 10:46 am
scandium21 wrote:
March 6th, 2020, 10:28 am
Would it be a violation of the spirit of the competition to build a Wright Stuff plane that is simply a ball and a rubber band. Our JV team is in a little bit of a pickle and does not have a good plane for regionals tomorrow. Could we throw together an 8 gram ball and chuck it as high as possible, or will the ES hit us with the spirit of the competition rule? This is a serious question.
The plane should be solely powered by the rubber band after release? I've never thought about it like this.
An I modified Guillows Flite Streak will do 15-20 seconds. A local middle school team might have one they can give you if they participate in the Aerial Scrambler event.

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