6:13 Is the roll cage removeable? I love this video series, thanks for putting in the effort to show what you are doing and in particular explaining why!
Thank you for these videos. Many of us have a passion for the climb but never get an in depth to what it takes. Thanks again Robin! Hope to meet you one day
We are so lucky to have all this behind the scenes stuff. It’s all made me even more impressed by your achievements. Have you got any thoughts on a plan to make new cars in the future? Or do you think this tub will be the bases for an evolving design over the next few years?
I really appreciate your willingness to change your mind! And congrats on the tub. It's quite a windfall that the other series happened to change their safety requirements at exactly the right time!
I have no interest in building a care let alone running pikes peak, but I find those challenge / question and answer so interesting, Like yeah composite are probably not the best choice when faced with a massive drop, that make sense, but that not something you would like think about in most scenario and that is the interesting bit. Instead of overhyping stuff based on marketing name and miss conception you go through the reason behind the choice and the choice are wildly interesting and the answer never strait forward
Some excellent choices here. 6:15 looks very tight for getting a chair or yourself out in the event of an emergency/accident, but it's probably just the angles
I've fabricated several steel trellis frames for motorcycles. The design work, tube notching and welding are the easy bits! Insuring all the critical measurement are correct after welding is very challenging, even for someone with a great deal of experience. The welding sequence must be carefully planned and dimensions checked at every step. Unless you have a CMM, this requires a large granite plate and custom fixtures.
Thanks for sharing this series, I love hearing the thought process for all the decisions you're making. For the roll cage, how do you know the attachment points won't punch though the carbon during a roll?
Very curious to hear about your suspension. What will your designed travel be? Ride Frequency? Is aero sprung or unsprung or independently sprung?? There seems to be a lot of time on the mountain if your suspension can effectively control roll, while still being stable at high speed (everyone coasts over the bumps) through the rough bits... especially at washington!
With the cage on, how do you get in and out of the thing? Especially with the head surround which normally is put on and taken off to allow the driver access. I can't imagine the cage would be hinged somewhere or is put on after the driver is in. If anyone knows I'd love to hear.
Are the pick up points and front bell-cranks on a formula 4 tub just extremely over specced for their use case? How much of a safety factor are you designing for considering the drastic increase in vehicle performance? Also, would running a thin windscreen (similar to indycar or even just a basic faceted design) net any aerodynamic benefit?
Thank you for sharing this with us. Question, how robust will the rollbar to tub interface be? Intuitively it feels like bolting a bracket onto CF is a weak spot, but I'm just guessing.
Yes, you are right. I am using large bonded and bolted inserts that should add strength to the tub rather than compromise it. It will be a study place to mount also
Good deal! How does weight compare to other options? Tube frame? Aluminum monocoque, etc? What is max driver height for the tub? Is it a few inches longer than you need?
Were the suspension attachement points also a factor that you took into account while choosing the tub or the kinematics of any single seater are close enough to be worked around to suite your needs ?
Yes, this style of tub allowed me to use a more traditional roll centre position. A lot of the modern stuff has an instantaneous centre on the outside rather than inside. Natural understeer in that case
Look,at your cage design… is there enough room to actually get into the tub. The scale of the helmet is hard to gauge the aperture? Single seaters are notoriously difficult to enter and exit without an additional cage.
That is an insane bit of kit for under $10K shipped, wild.
100%! It even came on a plane....
I was super surprised about that too. A great start point.
even less in the UK, theyre going for around £3,000 plus VAT for a bare tub
@@andk1987 Where we can find them?
Shoutout to superfast matt for introducing me to you. Every video has been super interesting.
Explanations of reasons for component choice is a very welcome part of your videos - please keep them coming!
that cortina in the background deserves a video on its own
I kept getting distracted by that too!
I was expecting another zero on that pricetag
3-5x the cost definitely wouldn’t have surprised me. I wonder how much of a deal Robin got given his relationships and the maturity of his program.
Thanks for taking us along! 👍💪✌
Seeing one of your videos always puts a smile on my face. Stay safe on the mountain, you've got to finish to win!
Yes!! More vids! Thanks for sharing this with us, I’m loving the project
Awesome. I'd just finished binge watching the other progress vids!
Hey if you’re bored some day, please feel free to talk about that Seven!
6:13 Is the roll cage removeable? I love this video series, thanks for putting in the effort to show what you are doing and in particular explaining why!
Yes, I will use the Single Seater hoop for the circuit events
Once again, thank you Robin. Love the videos, all.
Love the videos Robin!
Thank you for these videos. Many of us have a passion for the climb but never get an in depth to what it takes. Thanks again Robin! Hope to meet you one day
I hope you make it up to the peak someday!
Thanks for this video Robin. It's great to understand the process behind your choices.
Love from italy, keep up the work
super interesting content, looking forward to seeing the car get pieced together
We are so lucky to have all this behind the scenes stuff. It’s all made me even more impressed by your achievements. Have you got any thoughts on a plan to make new cars in the future? Or do you think this tub will be the bases for an evolving design over the next few years?
I really appreciate your willingness to change your mind! And congrats on the tub. It's quite a windfall that the other series happened to change their safety requirements at exactly the right time!
So awesome to get such an in-depth view of a top level PP car.
Speaking of cars… is that a Lotus Cortina build going on in the background?!?
Yessir!
The marmot catcher ❤😂
What is the weight difference between the carbon and steel tub?
a quarter shitload
I have no interest in building a care let alone running pikes peak, but I find those challenge / question and answer so interesting, Like yeah composite are probably not the best choice when faced with a massive drop, that make sense, but that not something you would like think about in most scenario and that is the interesting bit.
Instead of overhyping stuff based on marketing name and miss conception you go through the reason behind the choice and the choice are wildly interesting and the answer never strait forward
Thanks for sharing your process.
Some excellent choices here. 6:15 looks very tight for getting a chair or yourself out in the event of an emergency/accident, but it's probably just the angles
I've fabricated several steel trellis frames for motorcycles. The design work, tube notching and welding are the easy bits! Insuring all the critical measurement are correct after welding is very challenging, even for someone with a great deal of experience. The welding sequence must be carefully planned and dimensions checked at every step. Unless you have a CMM, this requires a large granite plate and custom fixtures.
Nice video, I'm really going to enjoy this build!
Could you have been able to fab a tube chassis that still hits your target weight?
Yes, tube frames can be very light. Look at UK Hillclimb cars
Thank you, fantastic contents!
Thanks for sharing this series, I love hearing the thought process for all the decisions you're making. For the roll cage, how do you know the attachment points won't punch though the carbon during a roll?
About the cage, did you do any FEA crash simulations to arrive at that geometry? Or are there some templates that you can use?
There are design rules that are followed. It's hard to define the load case for an exact crash in FEA
That makes sense, I was wondering how the hell you'd be able to properly define FEA while tumbling down a mountain
Love the videos
Could you swap the aluminum front intrusion plate for a titanium one?
Very curious to hear about your suspension. What will your designed travel be? Ride Frequency? Is aero sprung or unsprung or independently sprung??
There seems to be a lot of time on the mountain if your suspension can effectively control roll, while still being stable at high speed (everyone coasts over the bumps) through the rough bits... especially at washington!
I’ll get into suspension setup in a later video!
@@thesendyclubI'm very much looking forward to that episode.
With the cage on, how do you get in and out of the thing? Especially with the head surround which normally is put on and taken off to allow the driver access. I can't imagine the cage would be hinged somewhere or is put on after the driver is in. If anyone knows I'd love to hear.
Are you going to add some side impact frames as well?
8 grand is actually a crazy deal i never could’ve imagined that kind of price wow
Are the pick up points and front bell-cranks on a formula 4 tub just extremely over specced for their use case? How much of a safety factor are you designing for considering the drastic increase in vehicle performance? Also, would running a thin windscreen (similar to indycar or even just a basic faceted design) net any aerodynamic benefit?
The limiting load case is usually kerb strikes rather than cornering forces. But in this case it is something I am keeping a close eye on
Thank you for sharing this with us. Question, how robust will the rollbar to tub interface be? Intuitively it feels like bolting a bracket onto CF is a weak spot, but I'm just guessing.
Yes, you are right. I am using large bonded and bolted inserts that should add strength to the tub rather than compromise it. It will be a study place to mount also
Good deal!
How does weight compare to other options? Tube frame? Aluminum monocoque, etc?
What is max driver height for the tub? Is it a few inches longer than you need?
Were the suspension attachement points also a factor that you took into account while choosing the tub or the kinematics of any single seater are close enough to be worked around to suite your needs ?
Yes, this style of tub allowed me to use a more traditional roll centre position. A lot of the modern stuff has an instantaneous centre on the outside rather than inside. Natural understeer in that case
Reminds me of those Indy cars that ran the mounting when it was dirt. Their cage over the tub solution was far simpler idk if it's still legal
Still legal, some of the installs weren't my favourite though...
8k for all that?? Please don't give me the temptation to start a project I don't have the space for...
Robin, would drilling and bolting the cage on be problematic for the tub's integrity?
Yes, but I am adding large aluminium insert that are bonded in
" Mt Washington" Fuck ya, thats the real challenge
8:40 I always thought Dallara was the biggest single seater producer in the world.
Dallara do the top series, Tatuus do most of the regional feeder series. A lot more of those
When he said it was a deal I was guessing like my e 7500 for the tub but I guess not. Jeez
Who would win:
The entire Volkswagen Automotive Group
One Sendy Boi and some Barrys
Look,at your cage design… is there enough room to actually get into the tub. The scale of the helmet is hard to gauge the aperture? Single seaters are notoriously difficult to enter and exit without an additional cage.
All Hail The Algorithm