Alanstrike

[Alanstrike]

Hi from Aust

Just joined thought you might like apic

FJR1300 Trike


http://i770.photobucket.com/albums/xx342/AlanLehmann/MakoReady.jpg

[golftdibrad]

Hi from Aust

Just joined thought you might like apic

FJR1300 Trike


http://i770.photobucket.com/albums/xx342/AlanLehmann/MakoReady.jpg

that looks fantastic

[B-T]

Hi from Aust

Just joined thought you might like apic

FJR1300 Trike


http://i770.photobucket.com/albums/xx342/AlanLehmann/MakoReady.jpg

Very nice! How does it handle?
BT

[Alanstrike]

In a word Fantastic

This is a link to the oz clubbie forum and my first time out

http://www.oz-clubbies.com/forums/index.php?showtopic=13880&hl=trike

Link to first trake / test day

Video at Winton road test day - link ...

http://www.youtube.com/watch?v=2JaohD8FzTE&feature=email


... WINTON POSTSCRIPT 26th April 2010 ....

Went fantastic no bump steer hands off from get go – cooling could be a problem will be adding scoops and possibly side additional radiators ?? if driven normally cooling seems AOK First run was in car park to set brake balance ( had to back off to as far as willwood bias allowed and was great ) pulled up dead straight no lockup and just stopped – using original bike tank capacity should be OK no sign of starvation… no loss of traction at all in dry need more grip on front as is too stiff

Fix-it list – spring rate at front way to stiff ( 425lb std Yamaha R1 setup x 2 ) have a set of 200lb to try easy to change with shocks on top…. Lifted a wheel on an offcamber corner was interesting for a first time on a track.. feels very small racing with sedans ….

Mechanically nothing went wrong or came loose – brakes a huge success seemed to have about same heat front to rear – steering rack has 2.5 turns lock to lock very skittish over 130k/hr added a bit of toe in helped – Tyre pressure? I ran 30psi cold front and rear over all a great day – will be taking out rack to take up slack in pinion internal splines and remove hydraulic piston seals

This link is most helpful http://forum.teamfc3s.org/showthread.php?t=54847 others show only the removal of the seals to stop hydraulic lockup – spoke to an engineer mate at Kenworth and he confirmed the high speed problem probably related to “slop” of pinion setup – will let you know how I go ……

alan

In the shop now for some fiberglass work – will send pics soon

Regards Alan

[Alanstrike]

Hi pook

How did the first ( toyota powered ) trike handle - any bad tendencies ??

alan

[pook]

Hey Alan, never got it running, ran out of money and sold it (story of my life)
I LOVE your toy! great job!
I have the ratio formula somewhere for those rockers vs push rod angles so if you need it LMK.
PooK

[chiodeguate]

I seem to be stalled on my build too Alan. Regardless, great build from both of you. Keeps me inspired to finish mine.

[pook]

Alan, I took a closer look this morn and have a few questions and a suggestion or two on your lifting issue (I hope you don't mind)
I'm sure that you've read R Q Riley's cone theory on trikes? most guys think of it as "the Gospel" and IMHO it is NOT! Don't change those springs till you stiffen the roll bar...A LOT! whats happening is most likely your not "lifting" your rolling and you have a few issues to contend with.

First, dump the bike tire, MUCH research went into designing that tire to roll over in a turn (see first pic) If they make a wide tire conversion go for it and use a square short side wall car tire.

Second, Ignore R Q Riley, his math assumes we are all on narrow bike tires and I can prove it by looking at the "cone of death" he talks about in the second pic, as soon as the bike tire is removed the cone is widened just like if I used a 60" wide tire the trike would act like a car.

Third, as the bike tire lays over it actually gains traction and if you lift and the back doesn't break loose you will be testing the roll bars:(

Last, get a monster roll bar in the front, Bills uses a very thick 1" very short bar so it will corner flat.

Thats about all I have and while I'm no expert on trikes (no one is yet) I do see things differently than most the trike guys and don't want to see anyone hurt. when you said "you were lifting on an off camber" it sent shudders through me.
So AWESOME BUILD! and keep us posted.
PooK

[Alanstrike]

Hi

So may options - opinions - great this is what we need as uncharted waters can claim many a ship

Re car tyre on motor cycle rim - have been told by a very well informed tyre guy ( stuckey tyres melbourne a racing institution ) that a bike rim ( 17" ) is slightly smaller in diam to a car spec rim the difference is only 1.5mm but makes a difference in circumference of 4.7mm - the max +/- for a car spec tyre is 3mm and they have a special gauge to check. yes they will fit and look great but not safe.

Roll verses spring rate - hmm - a formula car engineer suggested the softer springs after reviewing as my trike basically doesn't roll - ie tyres are not griping and working as they should ( good pic on SHRIKE's web page shows a lot of lean and still hanging on ) will be trying a few things soon and sennd report ...

Have the original MX5 NC bar fitted and seems very stiff .. the Preditor ?? more info has that had much road / track time ?

Re over size tyre saw Youtube video of comparo bike tyre and cr tyre on a Honda? will try to find and post

lets keep talking....:thumb2:

[pook]

Agreed on the rim, thats why Ive never used a bike rim (check out the t-rex rig and see what they are using.)
You maybe right on the springs but in my head it doesn't add up (but lots of things dont...LOL) on the roll think about it this way and maybe I'm wrong but for a car to lift the inside (say left front) the outside right rear has to compress right? a tri-pod distibs all the weight as equal as it can to three tires, so to lift an inside tire either the trike is about to flip because the cg has pulled up and over or both the front and the rear have compressed already or your rolling further than the inside can rebound? if you say the roll is pretty flat then your past the cone! OR its not as flat as you think?
Does that make since?
I know I talk a big game on the trike thing but I spent a LOT of time and modeling on this concept because I didn't want to find out the hard way.
but you know what free advice is worth don't you?.....LOL
PooK

[Alanstrike]

Hi

From what i remember the trike felt very flat on corners like their was NO suspension movement, this makes me think that softer springs could help

Also Dave Norton ( nortonshrike.com ) has done over 120k miles in his trike with over soft springs and no anti-roll bar - he hasn't mentioned "wheel lifting" is a problem

have any one seen/ been in or know of how t-rex or similar handles corners as apposed to do-nuts

Alan

[Alanstrike]

Hi Pook

curious as to expected finished weight also what size diam & thickness main and secondary tubes have you used ?? - mine uses 2" x 16ga and 1.5" x 16ga tig welded

Alan

[Alanstrike]

Hey Alan, never got it running, ran out of money and sold it (story of my life)
I LOVE your toy! great job!
I have the ratio formula somewhere for those rockers vs push rod angles so if you need it LMK.
PooK

Hi

I looked closer at your pics and noticed the rockers are reverse to mine this may reduce your wheel travel Bump + Droop the reverse config seems to work well

Also my engineer required that i "fill-in" the webs to prevent distortion - was easy milled a piece if 12mm plate and fixed with a pin and 2 setscrews
i will see if i have a pic....:spin:

your thoughts
Alan

[pook]

Hey Alan,
They look similar but they are different, My links lay over and don't travel like yours would at a more vertical layout.

I get more wheel travel than I need now for my susp geometry, camber gains, R/C's and all that stuff.

On the rockers if you look close (the black strip under the alum on the bottom of the rocker) the bracket that link the sway bar doubles as well a doubler...LOL it is tied to all three holes.

The rockers are mounted in double shear instead of single.

Just two different approaches to the same issues I guess:thumb2:

PooK

[logotrikes]

Hi Alan,

I sent a private message, don't know if you got it or not, or had time to answer...

Just a couple of dumb questions, if you can get back to me at some stage. No rush...she who must be obeyed will think I'm barmy:)

Cheers, Martin

[Alanstrike]

Hi All
Just thought you might like an update - the trike continues to amaze me on the reliability and ease of use we have done over 8000 kms of the most enjoyable driving on the planet. Still get looks questions and that cant be legal ( remember we are from the nanny state ) only mod i have done since registration in Jan is to fit straight through " Tingate Racing " exhausts much better response and people can hear it coming. Found some great mountain roads to test me out - i am the limiting factor when it comes to finding the cars limits ... fun fun fun http://i770.photobucket.com/albums/xx342/AlanLehmann/Cars%20to%20Share/Front10thNov.jpghttp://i770.photobucket.com/albums/xx342/AlanLehmann/Cars%20to%20Share/Rear10thNov.jpg

[pook]

That's awesome Alan!
Question, Are you finding that on a side by side seating arrangement that handling is drastically different with or with out a passenger, or just minor?
PooK

[Alanstrike]

Hi pook re: side by side seating arrangement that handling is no different to a conventional good handling sports car you wouldn't know it was a trike - Alan

[pook]

Excellent! Thanks Alan.
PooK