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by jinhusong
January 17th, 2020, 9:30 am
Forum: Detector Building C
Topic: NTC Thermistor Calibrator
Replies: 2
Views: 670

Re: NTC Thermistor Calibrator

I am pretty sure it is OK to use it. You can implement it in java, python, or just on Excel. The wiki gives formula.
by jinhusong
January 16th, 2020, 9:19 am
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 560
Views: 37536

Re: Wright Stuff C

Hi, You may need to adjust the wing pitch (your angle of attack) when you switch between left and right turns. In our case, we need to adjust: rudder, shim, and wing pitch. Also, after switch the shim, please visually check the wing warp, make sure it is in right direction and reasonable amount. You...
by jinhusong
January 13th, 2020, 9:23 am
Forum: Detector Building C
Topic: Insulation Material/Waterproofing
Replies: 5
Views: 370

Re: Insulation Material/Waterproofing

I have a similar question, would it work if I were to cover my thermistor in either a plastic bag, sorta like a medical thermometer cover, or if covered it in hot glue or spray-foam? Thanks! They will all work, here is the but: they may take quite long to get stable reading or reach thermo balance....
by jinhusong
January 13th, 2020, 9:13 am
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 224
Views: 18707

Re: Boomilever B/C

We align all tension sticks parallel together, like all bar-code at one end and facing up. Then move them to the edge of a table. Let most part of the tick hang out of table with just like 1 inch of the stick pressed to the table by fingers. Then we just pick the ones with less drooping. I believe w...
by jinhusong
January 6th, 2020, 10:17 am
Forum: Boomilever B/C
Topic: Boomilever B/C
Replies: 224
Views: 18707

Re: Boomilever B/C

Hello! I was just wondering how much the "grain" of the wood actually affects the strength of the wood? I heard that C grain is the best. Can anyone confirm? We use C grain for 1/8X1/4 compression beam. If the section is square, the grain will not mater. We do not have data to compare different gra...
by jinhusong
January 6th, 2020, 10:09 am
Forum: Detector Building C
Topic: Detector Building C
Replies: 135
Views: 11573

Re: Detector Building C

That's just my strict interpretation of the rules. I don't actually have any idea if it would be allowed, since they made up a term ("preset program library") that does not have a definition. I would think that graphics libraries are not "preset," but their response proves otherwise. At this point,...
by jinhusong
December 10th, 2019, 3:31 pm
Forum: Detector Building C
Topic: Detector Building Calibration Thermometer Specs
Replies: 2
Views: 258

Re: Detector Building Calibration Thermometer Specs

I believe the 0.1C is resolution. 1-2C accuracy is acceptable.
For regional, you bring your own thermometer. Only for state and national, ES will give you their thermometer and you have to calibrate to that thermometer.

Jinhu
by jinhusong
December 1st, 2019, 10:36 am
Forum: Detector Building C
Topic: Temperature Sensors
Replies: 2
Views: 345

Re: Temperature Sensors

The LM35, TMP36 are all legit, but they are not easy either. Their output depends on the noise of the power input (USB to the computer, i2c to the lcd display all effects it). The output range is not in the sweet range of built-in ADC. Somehow, after play with them, we decided to go with thermistor....
by jinhusong
November 23rd, 2019, 10:24 pm
Forum: Detector Building C
Topic: Detector Building C
Replies: 135
Views: 11573

Re: Detector Building C

No. Read rule 2A.
by jinhusong
November 17th, 2019, 5:11 pm
Forum: Wright Stuff C
Topic: Wright Stuff C
Replies: 560
Views: 37536

Re: Wright Stuff C

Reverse S hook is the way to go. You can get it after a few practices. Our motor dropped middle air last year and that fixed it. You can make a bunch of them. Make them in a batch will improve you skill.

Jinhu

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