Robert Ryan
1.1K posts

Robert Ryan
@robssecondjob
Senior Design Engineer. Bookseller specializing in Americana and transport. Owner of misfit British cars.
East Falmouth, MA Katılım Ağustos 2013
335 Takip Edilen117 Takipçiler

@ripjetson9 Some analysis of seat angle. The angle of the seat definitely seems to have an impact on forces exerted on the spine (T6/T7 area). Another aspect that was noted was the angle of the headrest section with respect to the seatback. A large factor in the forces.
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@ripjetson9 The 15 minutes of sandwich fame was only the beginning.
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@ripjetson9 @felipesdad This is magnificent.
Henrietta, NY 🇺🇸 English

@EclipseClaims @felipesdad This seems like Shawn has a unfair advantage
Henrietta, NY 🇺🇸 English

@ripjetson9 Modeling update. No good results yet. Need to increase the input parameters. Expect more stupid questions.
East Falmouth, MA 🇺🇸 English

Here is 6° and 16° in a sprint car chassis and also 6° and 16° in a midget chassis
These work for ya @robssecondjob?




Robert Ryan@robssecondjob
@ripjetson9 @ripjetson9 Can you point me to good pic of a seat mounted at either 6 or 16? I am going to see if I can steal some time from my modeling guy tomorrow to see if he can quantify force differences.
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@ripjetson9 Editors note: I do not own a sprint car currently.
East Falmouth, MA 🇺🇸 English

@ripjetson9 My boss wandered by a conference room today with these pics on the screen. Two mechanical engineers, a phd in physics and myself (electrical engineer by training but running the engineering show) standing and pointing. He came back and said "That isn't your car looks too nice"
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@braddoty18 @ripjetson9 Once I can get him to get basic models I will have him do a sweep from like 0-20 get some numbers.
East Falmouth, MA 🇺🇸 English

@ripjetson9 @robssecondjob I ‘d bet there’s a lot of drivers who run even less than 6° @ripjetson9 !
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@ripjetson9 Perfect. My modeling guy will love this challenge.
East Falmouth, MA 🇺🇸 English

@ripjetson9 That would be perfecr. Don't make an extra trip today. Grab something when you are in the shop this week.
East Falmouth, MA 🇺🇸 English

@robssecondjob I will go to my shop and set a seat in a bare chassis at 6 and 16. Will that work for you?
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So i will share this. I talked to Jason Martin several times this week trying to understand what happened in his crash. Without getting into a bunch of details something that has changed this year was his seat angle in his chassis. Most of his career was spent in chassis’s that allowed for a 16° seat mounting angle. His cars this year have a 6° seat mounting angle. Neither of us know if that makes the difference or not. But its one thing that stands out from similar crashes over previous years
On a different subject personally I’m leaning towards the seat being mounted solid to the chassis. Isolating the seat on a floating mount can prevent the seat and the driver from taking part in any deceleration that the car/chassis is doing. When the car is absorbing load and decelerating the seat/driver is still continuing at full force possibly taking on a higher peak force when it bottoms out or coil binds
Simply put a seat mounted directly to the chassis has a smoother deceleration curve
Stiffen the chassis and that curve spikes again as well
Race safe ✌🏼
B.I.T.C.H. SLAPPED@BITCH_SLAPPED_
Ok, ill chime in for the people in the back. Adding or moving bars, increasing size or thickness of tubing in chassis construction does not reduce the amount of energy in a crash. It jist transfers it elsewhere. I think its obvious where that energy is being transferred to.
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@ripjetson9 You go to war with and for loyal. BTW your clock appears broken. This is the other part of the day.
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I mean even Willie Nelson is touring this year, why the hell not 😂
🇺🇸JJ YELEY🇺🇸@jjyeley1
Could be a good enough reason to go sweat our tails off for 9 days 🤷♂️. … Any suggestions X family ??
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@ripjetson9 When I did the same with my mom I always made it into a game for myself. I tried to come up with a new description or comment for every lap.
East Falmouth, MA 🇺🇸 English

Its Miss Rose Monday brought to you by Aaron Long
We had some food, we had some dessert and then mom wanted to go shopping. If you want a unique experience, try going shopping with a person that has short term memory loss. She will keep making continuously laps around the same rack because she doesn’t remember she was just on the other side of it. Things she did not like on the first lap, sometimes make the cut on the second or third lap. And then we will criss cross the store five or six times for the same reason. It builds patience in a person for sure and that’s something I’ve never had
Hope everyone had a great Monday and thank you for dinner tonight @ALdriveline ❤️




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