Ramp building

[flyracing]

Go to the last post.

[spinner]

Thats pretty steep for the height. I think if you want it that steep , you need to make it longer and higher. The one I built below is about 1m high. Its more of a "send it" ramp than a kicker. For that height , any more than 45 degrees will be too kicky I reckon.

http://forums.farkin.net/photo/data/500/ramp_2.jpg

[hubbie]

hey man, really depends on the intended purpose, but i'd suggest it was too short, and maybe too low for what you want. i'd say mark 1.4m from a wall, then 1.1 metres up a wall and see if you can imagine riding up something those dimensions. I have the kicker below which is 2.1m long and about 0.8m high, but goes nowhere near vertical, but has a real nice gentle transition, just you don't go particularly high. I suggest finding a quarterpipe (at a skatepark) which you like and steal its dimensions.

http://img150.imageshack.us/img150/5678/dsc04794mediumda9.jpg

[F1234K]

Mmm.. it's way too kicky for the height and length.

The easiest way to think about this is that you want BOTH your wheels on the ramp and only a slight difference in angle for the front wheel to the rear wheel.

The most basic idea is if the ramp had no curve both wheels would be at the same angle. You won't even feel it when you go over it.

The more severe the angle on the front wheel compared to the rear at takeoff the more kick you will feel when you hit it.

Too much angle and you will get the horse bucking effect where the rear wheel gets thrown up at the end of takeoff and you nose dive to face plant horribly. On your design the front wheel will be pointing 90 degrees (up) while your rear wheel will be somewhere around the 30 degree mark (practically horizontal). Not good....

For the height and length you are building I would make it much more subtle of a curve. Much much more subtle... The other guys ramp looks good in the 2nd post. You could give it more kick by making it curve more, but don't go too severe.

[flyracing]

Hey, thanks for the replies. what do you think about this one

http://forums.farkin.net/attachment.php?attachmentid=116815&stc=1&d=1222408109

[crimrides]

i rekon it really depends on what you want to do with it...
if you were gunna try and make a dirt landing for one i wouldnt think you'd want to much kick for 1100mm but if you were jumping into a creek, hell, make it massive!!

[TheBofh]

I've got a few designs I was playing with - get a length of string and chalk out the transition you want & then work out the dimensions that will fit or you can work the other way around - work out how high you want it or how long you want it & chalk out the transition between those points. Longer transition - mellower ramp, shorter transition - more kick.

[flyracing]

I'm gonna make a downramp out of wood and metal aswell and put wheels on the ramps and jump them in my street.

[TheBofh]

I'm gonna make a downramp out of wood and metal aswell and put wheels on the ramps and jump them in my street.Stick them on the back of Housey's ute & bring them around to the SFS BBQ.

[Rampage Ripper]

hmmm, this Google Sketch Up sounds pretty awesome, me and my dad made a kicker about 1.8 metres long, and about .9 metres high and we used the plywood up against the wall idea and its great. we used oregon timber as its heaps strong and light, we drag our kicker around everywhere, thats the sweet thing about portable kickers, you can take em anywhere and ride them. also, make sure you paint it too, as this will keep it from rotting ( if living in damp conditions )

[powley]

God i love SketchUp! its soo easy to learn, have you tried TurboCAD its pretty good too
i made a car
http://i212.photobucket.com/albums/cc177/h-powell/untitledurtut.jpg
http://i212.photobucket.com/albums/cc177/h-powell/untitledyuiytiet.jpg

[flyracing]

Ok, I think I have got pretty good dimensions now, just want to make sure you guys think it looks Ok so I don't stuff it up. I used a similar scale to rampage ripper but slightly steeper and i made it a bit bigger than my original. do you think it will be big enough to try pulling tricks off it like no footers, x-ups etc?
And does anyone know how to measure the main curve?

Thanks for all help so far. :)

[flyracing]

What do you guys think about the ramp above?

[Dandelion]

I use a flexible piece of aluminium for marking transitions, you can use anything long and flexy enough like wood, plastic, metal etc. Just hold one end at the bottom of the transition and bend it up at the desired angle. Another method is to use a long 2x4 with a nail in one end but that method can only create constant curves. OR you could make a giant ellipsograph:rolleyes:. Hope that helps.

[flyracing]

I use a flexible piece of aluminium for marking transitions, you can use anything long and flexy enough like wood, plastic, metal etc. Just hold one end at the bottom of the transition and bend it up at the desired angle. Another method is to use a long 2x4 with a nail in one end but that method can only create constant curves. OR you could make a giant ellipsograph:rolleyes:. Hope that helps.

Thanks for the reply but i meant how do i measure it in sketchup, but i worked it out now.

Does the ramp above look good?

[dcrofty]

Does the ramp above look good?

How big do you want to go? I think if you hit that ramp with any sort of speed you are going to get launched. If thats what you want go for it but otherwise you could probably tone it down a little bit.

Here is an example, the bigger creek gap on Dirt Merchant at Whistler. The kicker is perhaps 3 feet high at the most but it still sends riders a fair way in the air and the guy in the vid isn't going super fast either.
http://www.youtube.com/watch?v=BOJ5-PoG1tY

[flyracing]

I'd be wanting to get a decent amount of air as Ill be using it as a trick jump. but not absolutely huge.

Made a couple this time and not as high as the last one because ill be jumping it on the road and don't want it too big.
I prefer the first one but not sure if its too steep.
I wouldn't say the guy in that vid got much height of the ramp.

[flyracing]

Does the above ramps look like they will work. Because I might be starting it today an just want to see if it looks OK.

[flyracing]

me and a friend have found a huge mulch pile which we would use as a down ramp for this ramp and its about 1.1 metres high. I've made another ramp on Sketchup and I'd be wanting to get plenty of air off it and use it as a trick jump would do you guys think?
a reply would be great.