Interested in F1D?

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

Interested in F1D?

Postby leetx » June 1st, 2015, 1:55 pm

Hi, everyone,

I was a Wright Stuff coach a few years ago, and I now fly different classes of indoor models, especially F1D. I am looking for students who are interested in flying F1D and especially in making the U.S. Junior F1D team. In reading through these posts, I see that many of you are very interested in indoor flying and have the initiative to further your skills. It is clear to me that many of you are ready for F1D and would do very very well.

The requirements are to attend the Team Selection contest over Labor Day weekend in Lakehurst, NJ and if you make the team, to attend the World Championship in Romania in April 2016. I know that you all have many in-school and out-out-school commitments. I hope that some of you can fit in these additional commitments.

If you are interested, I will help you with instructions via online posts and email. I will also help with some of the difficult to get materials, but you will also be responsible for getting most of the materials and tools. You of course have to do the hard work. I have found my involvement in F1D to be greatly rewarding.

If you are interested, please respond to this thread. You may also contact me by PM. One of you have already expressed an interest. You may not be able to do it, but you might know someone who could. Thanks.

-Kang

User avatar
bernard
Administrator
Administrator
Posts: 1964
Joined: January 5th, 2014, 3:12 pm
Division: Grad
State: WA
Location: Seattle, WA
Contact:

Re: Interested in F1D?

Postby bernard » June 1st, 2015, 1:59 pm

Kang is on Scioly.org! /me cries from excitement
"One of the ways that I believe people express their appreciation to the rest of humanity is to make something wonderful and put it out there."

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

Re: Interested in F1D?

Postby leetx » June 1st, 2015, 4:05 pm

Please post your questions. I will answer as best as I could.

-Kang

bjt4888
Member
Member
Posts: 480
Joined: June 16th, 2013, 12:35 pm
Division: C
State: MI

Re: Interested in F1D?

Postby bjt4888 » June 2nd, 2015, 5:19 pm

Science Olympiad Wright Stuff competitors,

The serious Wright Stuff competitors among you should definitely consider Yuan Kang Lee's generous offer to coach for F1D. As a member of the US national team this past year, Mr. Lee won the F1D world championships, held in Slanic, Romania with flight times of 37 minutes and 33 seconds and 36 minutes and five seconds. Here is the National Free Flight Society blog page with stories about the championships.

https://nffsblog.wordpress.com/2014/04/ ... l-results/

Brian T.

0ddrenaline
Member
Member
Posts: 116
Joined: May 21st, 2015, 6:36 pm
Division: Grad
State: MI

Re: Interested in F1D?

Postby 0ddrenaline » June 2nd, 2015, 6:47 pm

Hello. I have never flown f1d, but I am interested in starting. I don't know if I could be good enough by labor day weekend, but I have plenty of time to fly in the summer and I am willing to try. I'm glad that you decided to help because it seems hard to find where to start.

calgoddard
Member
Member
Posts: 229
Joined: February 25th, 2007, 9:54 pm

Re: Interested in F1D?

Postby calgoddard » June 3rd, 2015, 7:11 am

Oddrenaline -

I am pleased you are willing to pursue the F1D flying event.

I know from personal experience that you could not find a better coach for this event than Kang Lee.

If you cannot meet personally with Kang, may I suggest that you send him photos of the various stages of your build and video clips of your flights. They will facilitate Kang helping you along in the learning curve.

Good luck to you.

jander14indoor
Member
Member
Posts: 1536
Joined: April 30th, 2007, 7:54 am
State: -

Re: Interested in F1D?

Postby jander14indoor » June 3rd, 2015, 11:36 am

Don't know where you are in Michigan, but there are active indoor model clubs and some F1D flyers around that may also be able to provide hands on help. Cloudbusters in SE Michigan is one. I think there is still a club in the Grand Rapids area and one in Flint.

Jeff Anderson
Livonia, MI

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

Re: Interested in F1D?

Postby leetx » June 4th, 2015, 1:25 pm

Oddrenaline,

I sent you a PM. Great to see your interest.

Regards,

-Kang
Last edited by leetx on June 5th, 2015, 12:12 pm, edited 1 time in total.

Less_Incidence
Member
Member
Posts: 55
Joined: February 8th, 2015, 8:23 pm
Division: C
State: CO

Re: Interested in F1D?

Postby Less_Incidence » June 4th, 2015, 5:53 pm

Kang, I'd definitely be interested in F1D! Convincing my parents to send me off to Lakehurst and Romania will be a battle, but I can try my best. I'll be at USIC next week with an LPP, a ministick, a standard cat glider and probably an F1M - I hope to meet you there!
2015-16 Events: (CMHS Invitational/Southern CO Regional/CO State)
Wright Stuff: //
Chem Lab: //
Electric Vehicle: //
Bridge Building: //

Lewis-Palmer High School class of 2016

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

Re: Interested in F1D?

Postby leetx » June 5th, 2015, 12:35 pm

So far, I have heard from 6 of you who are interested. I'm working to get you started. Stay tuned.

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

Re: Interested in F1D?

Postby leetx » July 2nd, 2015, 10:24 am

F1D plan and construction information are posted here:

https://nffsblog.wordpress.com/2015/06/ ... formation/

Take a look and let me know what you think. All suggestions welcome.

-Kang

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

Re: Interested in F1D?

Postby leetx » July 14th, 2015, 10:26 am

More progress has been made with the construction document, and many more photos have been uploaded. There are also a number of continuing posts on how to fly the F1D.

I believe we will field a full junior team for the 2016 world championship in Romania.

https://nffsblog.wordpress.com/2015/06/ ... formation/

https://nffsblog.wordpress.com/2015/07/06/f1d-basics/

nxtscholar
Member
Member
Posts: 261
Joined: November 14th, 2013, 6:25 pm
Division: Grad
State: NJ

Re: Interested in F1D?

Postby nxtscholar » July 15th, 2015, 12:15 am

I'm asking probably already knowing the answer, but what is the age barrier between the F1D junior team and the senior team?

calgoddard
Member
Member
Posts: 229
Joined: February 25th, 2007, 9:54 pm

Re: Interested in F1D?

Postby calgoddard » July 15th, 2015, 11:28 am

Kang -

The plan, instructions and photos you posted are all extremely well done. I can't even begin to imagine how many hours it took to put these together.

Would it help to show the CG on the plan? I assume that if all components are within their designated portion of the weight budget, the location of the CG of the completed F1D will be optimum.

I am surprised to see that this model has 1 - 1.5 degrees of down thrust, but as the current F1D world champion, you would certainly know that this is optimum for this design. I thought I understood from Cezar Banks that indoor duration stick models typically have zero degrees of down thrust. Obviously, I am still learning.

Would it help to show the optimum side thrust on the plan (in relation to the bearing)? I see from your instructions that you twist it into the bearing after the bearing is glued to the motor stick. I assume it is 1 - 3 degrees (to provide some of the left turn).

Congratulations on putting together such a fine tutorial. I have high hopes for your students.

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

Re: Interested in F1D?

Postby leetx » July 15th, 2015, 12:18 pm

nxtscholar,

For the world championship in 2016 (regardless of exact date), a junior competitor must turn 18 in 2016 (regardless of exact date) or later.

calgoddard,

The CG can be flown from 84% to 90%. The students should start at 84%. The CG is achieved using ballast.

Down thrust of 1 deg and left thrust of 3 deg are shown are the plan, but these may not be enough. Each model must be field tested and customized. I believe 1.5 deg down and 3.5 deg left will be necessary.

On this model and on most indoor models, the zero-degree thrust line runs below the vertical center of gravity. Thus, at zero degrees, the thrust creates an upward rotating torque. This upward rotating moment is especially high at launch and causes the model to stall. One part of the solution is to decrease this upward moment by increasing the down thrust. Different fliers do it differently, and many use a motor stick that bend under high tension. In our design, we use 1 deg of down set statically and will use additional down by letting the Ms bend if necessary. In actuality, on this F1D, it takes 4.7 degrees of "down" for the thrust line to run through the vertical CG.

Thanks,

-Kang


Return to “Wright Stuff C”

Who is online

Users browsing this forum: No registered users and 1 guest