joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 Tow in at 75 mph and a ramp degree of 63.68 degrees in the middle and 84 degrees at the top with a 30ft length should be big enough to get at least 50ft + of air , using the parachute should be fine at about 30ft so it might be possible Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted August 6, 2009 Report Share Posted August 6, 2009 A parachute at 30ft? You might aswell not have one Quote Link to comment Share on other sites More sharing options...
arw_86 Posted August 6, 2009 Author Report Share Posted August 6, 2009 Tow in at 75 mph and a ramp degree of 63.68 degrees in the middle and 84 degrees at the top with a 30ft length should be big enough to get at least 50ft + of air , using the parachute should be fine at about 30ft so it might be possibleshizzle!...are you a maths genius or did you make up alot of numbers to sound clever? either way im impressed lol Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 It was a calculator and a bit of speed guessing , i started from 50mph and 75mph gave me a reasonable height so i rounded it all up and put it on ps . you dont want to know the sums Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 6, 2009 Report Share Posted August 6, 2009 What are you assuming the bike + rider's weight is, suspension hardness is, etc.? There's a shit-tonne of variables that I doubt you'd be able to just conjure up a figure.Either way, if after all that faffing around you're only getting 50ft of air, that's no more than Hoffman, Kevin Robinson & Co. are getting nowadays on BMXs anyway? Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted August 6, 2009 Report Share Posted August 6, 2009 ps . you dont want to know the sumsNo, I do because I think your full of shit.Tow in at 75 mph and a ramp degree of 63.68 degrees in the middle and 84 degrees at the top with a 30ft length should be big enough to get at least 50ft + of air , using the parachute should be fine at about 30ft so it might be possibleJust quoting this now for future reference.... Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted August 6, 2009 Report Share Posted August 6, 2009 Hahahaha this guy is a genius! Seriously stop posting, you're just gonna get shit for it. Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 I used a 21.5 lbs bmx bike with a average male weight as 70kg but yeh as you said it is a bit stupidthey ride mostly on a 14-15ft vert ramp they only get about 9-10 ft max out of them so thats no where near 50ft Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 6, 2009 Report Share Posted August 6, 2009 They get a shitload more than "9-10ft" out of a 14ft ramp. They generally get at least the height of the ramp out of the ramp itself, so for the majority of comps they're going to be getting about 16-18ft of air.To put it into perspective, at the last X-Games, Kevin Robinson did a no-handed flair that was 18.8ft above the deck of a 25ft ramp. That's 43.8ft off the floor, and that's upside down, no-handed. Quote Link to comment Share on other sites More sharing options...
arw_86 Posted August 6, 2009 Author Report Share Posted August 6, 2009 lowest base jump recorded is 71ft and he was attached to the tower so as soon as he jumped the parachute was pulled open....still hit the ground pretty hard. so all in all id say the stuntman would need to be atleast 100ft high to account for gaining speed to make the chute open. Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 (edited) Well i will take that as pretty f**kin huge iv never seen a ramp that big beforeYou can modify the chutes to be a special timing and speed but its not recomended and might be illegal Edited August 6, 2009 by joshlyd1 Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted August 6, 2009 Report Share Posted August 6, 2009 Do you actually have any idea what you're talking about?If you fell from 30ft there would be nowhere near enough time to open a parachute as it's the wind passing through them that makes them inflate to open. Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 6, 2009 Report Share Posted August 6, 2009 Shit video: Youtube Video -> ">" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted August 6, 2009 Report Share Posted August 6, 2009 You can modify the chutes to be a special timing and speed but its not recomended and might be illegalTo be fair, I'm almost 100% that any kind of parachute related things in a public place are illegal. Quote Link to comment Share on other sites More sharing options...
Davetrials Posted August 6, 2009 Report Share Posted August 6, 2009 No it wouldnt work i tried a stunt like this ages ago wen i was a bit mad loli found a huge hill and made 2 dirt jumps 45 ft apart then i did it on a mountain board landed perfect then hit a tree and bruised all my ribs and my jaw it was a bit stupid Also i spotted a huge downhill country road with like 25% hills , so i took the challenge..i built a go cart out of wood , had custom steel axels made , you turn with your feet and screwed a plastic bit off a school chair to it , put wheelbaro wheels on it and raced it down with about 50 psi over the max in each tyre i went down , i was accelerating way too much and i had noo brakes and just a dh helmet on , i was overtaking cars slowing down for the hills the as i was hitting the last hill i got down ( my eyes were watering and i was getting speed shakes and wiggles ) Then i noticed hay above a bush ( ahhh ) i hit a blind corner as if it was a track hit a pebble and flipped over ( slided on my head for 50+ft went throught a fence into a garden..LOLSur full of shit Quote Link to comment Share on other sites More sharing options...
arw_86 Posted August 6, 2009 Author Report Share Posted August 6, 2009 Shit video: Youtube Video -> ">" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350"> Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 You can have special one offs made eg on a stunt show i watched ages ago they used compressed air to inflate the parachute but you can use Co2 gas to fire the parachute out but it would still be very hard to make it safe and structured so it would be capeable of taking the Gs and the risk of a fall at 75mph would definatly cause death and with compressed gas attached , You would just be a moving bomb waiting to explode .as i said MIGHT be possible Quote Link to comment Share on other sites More sharing options...
Davetrials Posted August 6, 2009 Report Share Posted August 6, 2009 Are you pete wright? Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted August 6, 2009 Report Share Posted August 6, 2009 Are you pete wright?Hahahahahaha!There is no way you could carry a canister of compressed gas big enough and capable of expelling the amount of air needed. You'd need a much bigger parachute just to carry the extra weight of the bottle. Quote Link to comment Share on other sites More sharing options...
Mark W Posted August 6, 2009 Report Share Posted August 6, 2009 You can have special one offs made eg on a stunt show i watched ages ago they used compressed air to inflate the parachute but you can use Co2 gas to fire the parachute out but it would still be very hard to make it safe and structured so it would be capeable of taking the Gs and the risk of a fall at 75mph would definatly cause death and with compressed gas attached , You would just be a moving bomb waiting to explode .as i said MIGHT be possibleYou don't need 75mph to get 50ft of air, just sayin'. Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 Whos pete wright ? No if you are under the maximum weight of the parachute you could be ok , also you could ditch the canister when deploying the chuteThis is why they made jet packs .no tow in needed and then you would be able to deploy a parachute Quote Link to comment Share on other sites More sharing options...
Lawnmowerman Posted August 6, 2009 Report Share Posted August 6, 2009 I give up. If I were you I'd just stop before you're ridiculed. Quote Link to comment Share on other sites More sharing options...
Pashley26 Posted August 6, 2009 Report Share Posted August 6, 2009 This is why they made jet packs .I love you :$ Quote Link to comment Share on other sites More sharing options...
joshlyd1 Posted August 6, 2009 Report Share Posted August 6, 2009 I was just prooving a point but if my knowledge isnt wanted so be it Quote Link to comment Share on other sites More sharing options...
monkeyseemonkeydo Posted August 6, 2009 Report Share Posted August 6, 2009 No it wouldnt work i tried a stunt like this ages ago wen i was a bit mad loli found a huge hill and made 2 dirt jumps 45 ft apart then i did it on a mountain board landed perfect then hit a tree and bruised all my ribs and my jaw it was a bit stupid Also i spotted a huge downhill country road with like 25% hills , so i took the challenge..i built a go cart out of wood , had custom steel axels made , you turn with your feet and screwed a plastic bit off a school chair to it , put wheelbaro wheels on it and raced it down with about 50 psi over the max in each tyre i went down , i was accelerating way too much and i had noo brakes and just a dh helmet on , i was overtaking cars slowing down for the hills the as i was hitting the last hill i got down ( my eyes were watering and i was getting speed shakes and wiggles ) Then i noticed hay above a bush ( ahhh ) i hit a blind corner as if it was a track hit a pebble and flipped over ( slided on my head for 50+ft went throught a fence into a garden..Wow, you're right, what you did is almost the same as riding a motorbike off a quarter pipe and parachuting back to earth. Thanks for clearing up whether it's possible or not. Quote Link to comment Share on other sites More sharing options...
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