2007 Grasshopper 4is
This is a modified chassis with Grasshopper type-1 base.
I am modifying Grasshopper type-1 series chassis continuously since 1984.
It's just an long term experiment with my studies of chassis design or practice for my setting skill.
:) / Front suspension assembly of DT-02 is combined to Grasshopper chassis with homemade bracket.
Each rear suspension consists of DT-02's lower arm, TL-01LA's upright, DF-03 aluminum front damper and titanium turnbuckle.
For lightweighting, titanium axle and 48mm aluminum dogbone were installed (but of course they're too weak against impact).
The monocoque is almost as original but was reinforced some places, also I had to make a heavy-duty battery holder because Grasshopper often bombed the ground with his battery. LOL
/ / Fig7: A counter-gear consists of three parts.
TA05's aluminum spur gear holder, stainless 16T gear and TRF415MS's shaft. / / Fig:8
Each looks are different but both WR02 and Grasshopper are using same 50 tooth final-gear.
WR02 diff has metal inner-gears and a heavy-duty sealed case.
So, its effect is able to adjust by kind of sealed-grease, just like a viscous LSD.
5.0mm shafts which have spline were taken from a DT-01's junk.
TLT-01 drive cups are combined to them, finally. / / Movie is following URL prease watch and enjoy.
Thank you.
http://minirally.cool.ne.jp/graho.wmv
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If you liked those pictures, you should see these...
Grasshopper 4is
Comments
scollins
Absolutely tremendous ingenuity! Your Grasshopper was the inspiration for my RC10 Grasshopper hybrid, thanks for the motivation!!!!
Grahoo
Thank you for commenting. let's enjoy each project each other. Cheers!
Toonz
fantastic work and i enjoy look at your website. what oil and springs did you use for the DF03 shocks?
Grahoo
Thanks, Toonz
I am using 3 holes TRF teflon piston for both front and rear dampers. Now, front oil is #200 and rear oil is #300.
Then, DF-03's piston seems to need always hard oil but I think hard oil makes tuning difficult because it changes its effect by temperature.
So, I am using TRF damper's piston to this car. TRF's hole is smaller than DF-03's piston's hole and it made possible to use soft oil.
scollins
Please Tamiya - if you are listening, hire Grahoo to be in charge of R&D!!!!!
joelvardy
I just love your projects and well thins one has to be my favorite!
Grahoo
Thank you scollins, but I will be soon fired maybe because I have no effort about the reduction in cost. LoL
Grahoo
Thanks, joelvardy
Grasshopper came back to Tamiya's lineup, I think that this project continues for more than 20 years from now on.
LOL
Hondabiker
Awsome! The whole package just looks so right. Superb vision with quality engineering, one of the nicest buggies in the club.
Martin71RS
Your grasshopper is one of my favourite cars on TC!! I really like the engineering and manufacturing you do.
Devilsome
mr grahoo sir! this is excellent!
perhaps tamiya should consult you for ideas regarding the df03 avante mk II, top work, stunning car, added to favs! 
dunebuggy71
Beautiful Grasshopper ! One of the very best. Must be so much fun to drive. You are a master modeller.
carbonman
Love your projects! and it drives great. Mmm carbon!
tamiyatom
my god! thats amazing ......you got some SERIOUS skills , i love the video too. It looks like it handles really well too!
boogyloop
good to see your still hammering this one out, well good to see your still working on your projects full stop. Been wondering what was next to come from you. top work as allways
Brat Attacks
Genius.
mymonsterbeetleisbroken
Amazing work!!!!!!!!!!!!!!!!!
Wez-li
Excellent stuff!
Grahoo
Thanks a million, for all.
I was really surprised by the praise of all of you.
This great honor is far more than I deserve.
I am sorry that I cannot give thanks individually.
But I think some persons are overrating my work,
I think I am an ordinary man,
and always I will take a time on the work that any one can do.
Anyway, I make your words encouragement. thank you!
Alohaplanenuts
WOW! Excellent attention to deatail! If only your mods were available during the original release... Superb!
necronomicon
That grasshopper rocks, looks like a lot of work ad technical prowess went into this!- something for all grasshopper owners to aspire to!
hey man,
you have a sick car dude but i was wondering what kind of wheels and tires you are using for it.
flux density
Ingenious gearbox setup ... lovely.
Hi Grahoo, great car as always. When you say you used TRF pistons in the DF-03 shocks, are these the pistons for the touring cars or the ones for the TRF501X buggy? Thanks
Grahoo
Sorry for delay, sim-san. Its pistons are for touring car shocks and 501 pistons seem too thick for DF-03 shock shafts.
Thanks for the info. I always thought the pistons in the DF-03 upgrade shocks and the DF-02 upgrade shocks were the same as the touring car TRF pistons. I guess I was wrong.
<>
Dude! Dude! You truly do not know when to stop, do you? Your the best r/c car modder on the PLANET! You wouldn't ever consider selling one of your creations, would you?
SMOKE-DOG
Now thats sick. A classic body on updated technology. Keep up the good work.
joelvardy
!! >> WHAT A CAR <<!!
I really can't describe how impressive looking this thing is!
castorini
I would appreciate some detailed pics without the body mounted. Impressive engineering!
scollins
Still one of my all time favorites from TC!!!!! Just genius!
Grahoo
Thank you for commenting, and really I'm sorry for delay....
tamman77
My showroom contains this car but only in my dreams!!! Love the gearbox mods, will have to give that a go one day
tamiya_drift_junky
MENTAL!!! Looks awesome!!
Grahoo
Many Thanks everyone.
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