How to Build a 1/87 Scale RC truck a.k.a.TTTT

[killer]

:ö:hey Arch,
yes you can use your Kyosho Perfex Radio!..
before buying anything for your 1/87 check out one of the thread i posted at Mini-Zracer.com.. here's how..

http://mini-zracer.com/forums/showth...&threadid=5526


my first try on 1/87 scale truck (prototype) using Kyosho Mini-Z electronics

http://mini-zracer.com/forums/showth...5&pagenumber=1

ei, don't laugh man i know, it's ugly! , this was my first try on making my own 1/87 truck.. and this were the parts available on my workbench during that time. hopefully, by next week i'll be posting my finished real rc 1/87 truck!.

about reciever as i understand it, there are some company that make tiny AM reciever (i think it is "Hitec") but i'll try to do some more research for you man, now if you plan to buy a reciver like GWS or any airplane reciever, which is very tempting co'z their size really fits this kinds of project, now, make sure you look for AM frequenzy, Kyosho Mini-Z radio transmitt AM signal only, so you'll be needing an AM reciever to decode the signal, and as far as i know, most of the rc plane reciever are FM frequenzy because FM are not prone to glitching problem w/c AM recievers are prone to, hope this help man. -æ

[Dux]

AM is fine for these kinds of vehicles. Just find the smallest you can!!

[Overlander]

Dux,

You are correct about the Novak being small. HiTec actually makes a smaller one.

But they are still not even close to being small enough for 1/87 scale trucks.

-Todd

[Overlander]

Hey Killer,

I saw that trick you did with the large crystal on minizracer.

I was going to try it, but we can't get the GWS receivers in 27MHZ here in the U.S.

Maybe you can smuggle them in for us ?

-Todd

[killer]

Originally posted by Dux
AM is fine for these kinds of vehicles. Just find the smallest you can!!

:ö: the problem is, if you can find one small enough to fit at the back of a 1/87 scale truck, and have more space for a servo, battery & ESC and motor to fit too , though some parts can be placed at the front of the the truck (inside the cowl) .-æ

[JTM]

i cant imagine why someone couldnt mail some small am 27mhz stuff here, i doubt custmos would know what it was, i dont even think it would be illegal.. kinda like chipped able boxes, aint illegal to own or have or sell or make, just use.

[killer]

Originally posted by Overlander
Hey Killer,

I saw that trick you did with the large crystal on minizracer.

I was going to try it, but we can't get the GWS receivers in 27MHZ here in the U.S.

Maybe you can smuggle them in for us ?

-Todd

:ö: it's the same mod i made on my GWS rx so i can use my BIG rc car crystal , not enough dough to buy a small crystal for now ,
smuggle?! hhhmmmm??? (thinking) i guess one is not bad, yes i can thru snail mail if you want one?.

-æ

[JTM]

so the GWS recievers would work with a regular ground AM transmitter? like the kind i use with my team associated rc10 gt?

[killer]

Originally posted by JTM
so the GWS recievers would work with a regular ground AM transmitter? like the kind i use with my team associated rc10 gt?

:ö:JTM,

it's like this, AM transmitter works with AM reciever, FM transmitter works with FM reciever, now if you try to use your AM transmitter with an FM reciever (like the GWS) it won't work, or vice versa, even if you use the same crystal frequenzy, but one thing i descovered, that your regular ground FM pistol type transmitter will work on FM rc airplane reciever (with FM rc car crystal to match the crystal i have on the transmitter), which i have been using for quite some time now..

to simplify everything:
*tx = transmitter
*rx = reciever
*AM= frequenzy
*FM= frequenzy
* = good
* = not advisable!!!

AM tx + AM rx=
FM tx + FM rx=

FM tx + AM rx =
AM tx + FM rx =
this combination will not work even if you use the same crystal frequency either FM or AMcrystal.


*modified version*

FM rc car tx + FM rc airplane rx =

¤ make sure that you have the same crystal frequency for this combination to work, if you can't find the right crystal, you can do this modification so you can use your 1/10 rc car crystal, co'z rc car crystal is too big for the airplanes rx crystal slot, here's how; solder a piece of wire on the crystals leg and solderi the other end of the wire on the crystal slot.

-æ

[arch2b]

overlander
yes i promise i will finish mine as quickly as i can. it will take a while as i can't afford to get all the parts at one time. i'm starting with the roco's and faller and brass work. i'll move on to the electronics after that.

killer
thanks for the info. i have read your thread before but forgot about it. i don't have a mini z pcb to spare and the are expensive. very cool idea and very impressive that you got it to work.

i am just catching up on the last few posts as i spent nearly 2 hours reassembling the servo pod for my overland. i was putting in my alloy knuckles and s.s. king pins and mistakenly opened the servo pod only to have two small parts fall out and are extremely hard to get back in without taking the whole front end apart. what a mess.

[arch2b]

killer,
can you get micro narrow band am recievers to ship to us in the states? i have several crystal sets for my mini z's i could use, with the mod you described.

[Overlander]

arch2b,
Yikes That will be good training for a TTTT No need to promise though, you have kids too


JTM and Killer,

The root of the Rx vs. Tx issue is thatWE CAN NOT GET 27MHZ GWS RECEIVERS IN THE U.S.!!


Killer has offered to be a smuggler. I'm in.

-Todd

[JTM]

i will need this to use my futuba transmitter? then im in too.. just let me know what i need, i wanna build one of these bad boys

[arch2b]

if killer can do this, i'm in also.

[Overlander]

Everyone should check out Thorstens page at http://www.mikromodell.de/index_e.html.

He has done a lot of work and translated the HO Truck section into English.

The truck models he shows are all increidible and are very insperational.

-Todd