GTR Season 3 | Lessons Learned - Part 2

[@richardmorgan9273]

I hope you're all paying attention - there will be an exam at the end of the tournament! Happy Christmas diecast fans!

[@gravitythrottleracing]

HAHAHAHAHA!! I'm working on it now!

[@richardmorgan9273]

@@gravitythrottleracing I quite enjoyed your little lecture - but then I'm an engineer by trade, too!

[@TheMunchBoogie]

First off............MERRY CHRISTMAS TO EVERYONE!!!!!!!! And YES here in Germany we've just crossed over into Christmas Day. Regardless of the "Death-By-Powerpoint", this was a great video with lots of informative stuff that helped me make sense of many things that help the vehicles move as they do on the track. Can't wait until season 4

[@gravitythrottleracing]

Merry Christmas Munch!

[@sstdiecastracing2372]

That was great info. Thank Looks like my truck is in the zone. Thank you so much for that Vid. Now, will mine be .56 or .76 mm suspension. I will need to finish the track and test but I still do not have a drift pad or scrambler. I thought I made my test track with every known part I see out there until you came along. Thanks Mark, Merry Christmas. You made the EVE for me. Have a great night and to you and yours, God Bless.

[@Bigstank7420]

Good to see another proud broncos fan even if thre isn’t much to be proud of at the moment

[@gravitythrottleracing]

Thank you. It's been an ugly season, so it becomes my ugly Christmas sweater. :(

[@Bigstank7420]

@@crypttonite I totally get what you are saying and y I feel that way unfortunately I bleed orange and will be a broncos fan until the day I die… even after they have been bought by the most corrupt business in the planet wal mart

[@cutrockr-diecastracing2773]

Great lover of doing tests/analysis, so your video and work enjoyed greatly, and information noted! Merry Christmas from downunder, Marc D

[@gravitythrottleracing]

Merry Christmas Marc!

[@EddieDexterStewart]

If I were in Starfleet, I've always said I would want to be an engineer. This is GREAT STUFF! LOVE IT! Lots of fascinating data and I know it's going to help tons of builders out there! ***Chef's Kiss*** Thanks again! Merry Christmas and a Happy New Year!!! 🎄

[@sstdiecastracing2372]

Oh boy, this is going to be great. Thanks mark. I will post again after I watch.

[@TheMakersBox]

Lots of good data! Thanks for all the time put into that. I'm sure it is going to make a big difference in the quality of racing next round! Based on stock weight and distribution, I would have though the Studebaker would have done better.

[@PainFireFist]

Merry Christmas from a fellow engineer.

[@gravitythrottleracing]

Yes! Engineers rule!!

[@cashmoneyboys4628]

Thanks for the data!! I almost want to send my build in just for a rating!! Merry Christmas!!

[@gravitythrottleracing]

Hi, my name is Mark and I'll being running your Hot Wheels diagnostics for you. HAHA! Merry Christmas!

[@schottys-diecast]

Thank you for this huge amount of datas and all the time you have put into doing this!!! Verry interesting! Now i have to check out if the steps i did right now where the good direction. It‘s still under construction because you gave us the good advise to wait for you information! Thank you! I wish you and your family and all the others out there great holidays and a happy new year! 🇱🇺

[@spoolheads]

The geeky wonderfulness of this video is absolutely amazing. I learned so much and can't wait to race on your track again. Great work and thanks for putting in so much time on it.

[@MetalMania3DTV-TAS-AUS]

What Marc D @Cutrockr-diecastracing2 said 😊 Merry Christmas🍺🍻🤶🎅 to you and your family and all the best for 2023👊 Cheers🍺🍻 KC Cradle Mountain Tasmania Australia 🇦🇺🤝😎👍

[@gdmracing1]

A great video. Appreciate all the work and effort you put into these analysis reports. Very informative and extremely helpful. Thank you very much. I hope you and yours have a very Merry Christmas. Mele Kaliki Maka from the Island to you. "Keep your roof to the Sun". Mahalo

[@sstdiecastracing2372]

Trying to finish my Tanneau cover for truck # 2 video. Will post soon.

[@cyranobuckminster1970]

Great video. Rubber Tow's Rundowns are bookmarked in my mod tutorial list and I re-watch it often (thanks Rubber Tow!).

[@Chris_Hood]

Wow-wow-wow, wow! Excellent presentation here, GTR full marks to you 👏 Kudos for taking the time to put all this data before us ahead of the tournament; that's just aces of you to go this far 💯😎🏁

[@numbskulldiecastracing]

Outstanding. 🙂

[@ChristianTravelers]

Merry Christmas from Daytona Beach, Florida

[@g-forceracing_27]

Thank you so much for all your work!! You're really helping us all and making it more exciting!! Really looking forward to the next race!! 🏁🏁🏁

[@roadragediecastracing3676]

Absolutely love the detail and thought into what you do . I love that you are also giving out advise for for your track and letting racers know what might and might not work. Thank you and MERRY CHRISTMAS to you your family and ALL the racers.

[@ElevationDiecastRacing]

Merry Christmas to you folks and this will be in my archives for future reference

[@kawamach]

Thanks for sharing the engineering point of view!! quite a lecture!! greetings and thanks for all the sharing!! Feliz Navidad!!

[@Quetzachapin]

I just found your channel and enjoy it a lot. This explanation tells me that you put a lot into the races by modifying the cars and making them better. Ps. I enjoy watching the sport cars races. Thank you.

[@IndianaDiecastRacing]

Engineers.... 🤣🤣🤣 Awesome breakdown, good info!

[@MrDarq13]

Great stuff Mark! I love your PowerPoint :) Really awesome info!

[@H3zzard]

'Lessons learned' is a great teaching experience, and thank you for sharing this information with us! I hope you and the family have a safe and fun festive time. And that goes for everyone watching and subscribing too.

[@HydroThunder16]

Dude!! Been a fan of you for a while now but you’re also a fellow broncos fan? So awesome. Let’s hope for a turnaround next year 😬

[@MichaelPiz]

More great tips. If you'd never told us you're an engineer, I'd have guessed it. 😁 I'm a software designer, so we have some similar quirks. Never been a big truck fan but there's plenty of advice herr that I'm sure adapts to cars.

[@bigalscustomdiecast2504]

This is just incredible! So much insight into this technical track!

[@brunopaiva9203]

Merry Christmas 🎄🎄⛄🎄 from Portugal!

[@Vapor_Diecast_Racing]

Thank you and Merry Christmas!🎄

[@hilanddoug]

That was a cool presentation! Well done. Merry Christmas to you and yours!

[@Lily.The.Dog.]

Merry Christmas to you as well and thanks a bunch for the research!

[@Vic-Norman-1974]

This was a cool video. I watched it when it came out and again today.. Can't wait to see more racing... The track must be looking amazing.. I am imagining all the decor and theming that you're going to have done when we see it again... Really itching for the next video and tournament.

[@gravitythrottleracing]

Thanks! I'm itching, too. Targeting Feb 13 to start Season 4. Have all the trucks, but need to finish a few more things with the layout.

[@Vic-Norman-1974]

@@gravitythrottleracing No matter what.. Its going to be insanely good... ...

[@epvideosdiecastracing]

Loved it! Thank you! 🙏

[@michael_schreiner]

Merry christmas eve from Germany!

[@limegreendemon5847]

Great in-depth video, I had no idea how much thought went into modding these cars. Merry Christmas!

[@ndro_tb]

this is awesome... Thank you so much for the presentation

[@smoothboyhobbies]

Love these deep dives. Merry Christmas!!

[@TGA2010000]

Loved the video!...very informative sir....great job brotha

[@nickdeavers5816]

One issue I can think of will be finding a balance in keeping your car rolling straight vs having suspension. The reason most of us glue our axles down is so you don’t have to worry about caster. By not glueing them in caster becomes an issue which will cause your car to not roll straight.

[@gravitythrottleracing]

That is a good point. Piggy and Boxer were straight shooters.

[@zeldadiecastracing]

Merry christmas to you and your family bro,good morning from indonesia bro,thats so cool design race track bro

[@jessesdiecastgarage]

Awesome and great information I want to work on some cars just for myself and see what I can do to improve their performance so thank you I appreciate it

[@MonsterMotorsportsDiecast]

Thanks for the shoutout!

[@terribelbliss9646]

Oh hi, I’ve watched this video… twice, and appreciate your advice. I was wondering, and I think you touched upon it, does aerodynamics come into play at all? Thanks for making this not only exciting but elucidating as well. I hope you have a good holiday and merry Christmas. 👍🤓

[@gravitythrottleracing]

Interesting question. In the case of hotwheels, even at their max speeds, the aerodynamic effect is negligible. I'm really saying the drag effect is negligible. The largest type of drag on a hotwheel, if it were measured, would probably be profile drag. A highly contoured body shape will have less profile drag than a van for example. Another type of drag is compressibility drag. It occurs when speeds are high enough to compress the air molecules as they pass around the body. Suffice to say, hotwheels don't travel fast enough for either the profile drag or compressibility drag to effect their performance. We know that hotwheels can travel more than 350 mph if they were scaled up to real size. But for a real size car, all types of drag such as induced drag, skin friction, profile drag, compressibility effects, and on and on, have a huge effect on performance. The reason a little hotwheels doesnt experience this is because the air molecules have mass, too. A small hotwheel car won't influence the air molecules as significantly as a real car or an airplane. When we test an airplane in a wind tunnel there's a term called the Reynolds number that accounts for how air molecules around a small scale model interact differently than the full size model. Sorry, this is WAY TOO long, but I hope some of it adds clarity to my answer.

[@terribelbliss9646]

@@gravitythrottleracing thank you for the insightful response.

[@pyrojelli1]

🎉 this is super informative! I hope you don't get offended when I ask, but is it possible that you are partially colorblind? The bars you called green ☘️are actually orange 🍊 .

[@gravitythrottleracing]

Oh, now that's too funny. Yes, I am colorblind.

[@pyrojelli1]

@@gravitythrottleracing oh lol u had me frantically trying to find something orange and something green in my house to put them near each other, to make sure it wasn't an issue on my end 😅

[@Slack_Tracks]

Great info!!

[@invisiblestacker]

Happy new year. When can we expect more racing? Need a fix.

[@gravitythrottleracing]

Yes indeed. The truck tournament starts Feb 1st. I'm working really hard on the landscape this month.

[@donknott]

New viewer here. I watched the video until the end. Is there a way to measure Drag coefficient? It has to make a difference even at this scale. Also, could you not remove the side windows for the cab and add weight inside the cab instead? What about using mercury as a weight component, something that can move from side to side in the turns for more stability? Thanks.

[@gravitythrottleracing]

Hi Don. Wow! Interesting questions. The way to measure drag is by mounting a hotwheels car to a sting and placing it in a wind tunnel. You could do something more simple like my buddy and I did in college, which is to mount it on from the side view mirror or the top of your car you drive to work. The string will have a strain gauge glued on. Without a hotwheels mounted on the sting, measure the force that the wind is pressing against the sting itself. This is the baseline force for any given speed. Next, put the hotwheels car on the sting and do the test again. The difference in drag force is the drag due to the car. This can be converted to a drag coefficient (which is non dimensional). To be honest, the small size coupled with the actual speed of a hotwheels car (10 mph or less) isn't going to create a lot of drag. I think the aerodynamic drag contribution is very minor compared to weight distribution on the chassis and friction with the axles and wheels. Nearly all builders separate the body from the chassis and add weight. I don't know about mercury, but I've used steel, aluminum, and tungsten. Hope this helps.

[@rudimoons554]

👍 Thx 🇧🇪. 🎄🎅🎆.

[@nickdeavers5816]

If I build a “test” truck can I send it with my actual entry.

[@gravitythrottleracing]

A test truck and your entry at the same time? Yes.

[@nickdeavers5816]

Thank you

[@164diecast]

Merry Christmas :-)

[@elizabethhoyle9155]

Why do you have the dog's Christmas stocking on your head?

[@gravitythrottleracing]

I have no idea. 😁

[@refugeinc.159]

this guy needs to discover girls.

[@gravitythrottleracing]

Haha! I will show this to my trophy wife.

[@isharachaturangani5028]

Mm mm mmmmmm mmmmmm mmmmm mmmmmmmmmmmmmmmmmmmm mmmmmmmmmmmmm okay aaa