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

[killer]

:ö: ei!, what's wrong here?, where is everybody?.. -æ

[killer]

Originally posted by Overlander
[b]
Stupid things I have done that have caused problems:

Used a Futaba crystal in a JR receiver.

:ö:

Overlander,

Call me stupid , but that's odd? co'z i am using a Futaba 40Mhz standard size 1/10 rc car FM crystal on a GWS R-4P rx (with an adoptor), and a Futaba 3PDF (pistol/gun type) transmitter on all my truck and it seems to work just fine, with a good range too!

-æ

[Thorsten]

Hi killer,
I know, that is working good. The only different between the crystals is the housing.

In my cars I don't have enough space to plug the xxl-size crystals ;-)



Best regards

Thorsten


www.mikromodell.de

[arch2b]

i'm rather new to the rc electronics, so please excuse my ignorance.
is the problem overlander refering to have anything to do with futaba being negative shift and jr/hitec being positive shift? i'm not sure what the 'shift' refers to but i was told they had to be compatable.

[Thorsten]

Hi arch2b,
I don't know exactly the meaning of "negative/positive shift" by using in rc-controler.
But maybee it is only the rule to transmit the forward speed in a short puls of the signal and the backward speed in a long puls.

So you have no problems to use them in the same truck. Just activate the "servo-reverse" and everything will working.

Some very old controler (<20 years old ) works by a negative voltage signal. So their are not compatible to the new recivers or servos. Additional the old parts are bigger than our whole cars ;-)

best regards

Thorsten

www.mikromodell.de

[Overlander]

Hi People!

Forgive my absence, my company is launching the series of the newest AutoCAD products and I have been on a marketing tour for the last couple of weeks. Just two more cities to go, and I will be back to the shop. San Francisco tomorrow and Vancouver Friday.

Looks like I'll be a have another 100K airline miles this year again

Killer,
I am pretty sure that you can not use a Futaba FM crystal with a JR FM crystal. AM might work. I usually dont mix and match. I own about 20 radios and they all have their own sets of crytals.

Keep building!!!!!!!!!!

[killer]

Originally posted by Overlander

Killer,
I am pretty sure that you can not use a Futaba FM crystal with a JR FM crystal. AM might work. I usually dont mix and match. I own about 20 radios and they all have their own sets of crytals.

Keep building!!!!!!!!!!

:ö:

hhmmm???.. i'm pretty sure too that it works, cause that's what i've been using since the beginning of my 1/87 project truck (except the one w/ Mini-Z board on it).. wait is the GWS R-4P you meant about "JR" ?.

20 WHAT?!!! what the heck are you going to do with all of those radios?.. i only have 4 radios, and that's two 2channel AM TX (from Mini-Z) one for me and one for my son, and two 3channel FM TX... but i have quite a few FM and AM recievers with crystals on my tool box... other radio transmitter that comes with some rc kits i bought are opened up for surgery, some of it's parts like micro resistors and capacitors are used on my 1/87 truck lights, and some are used to replace the stock pot/trimmer on my converted servo ESC (instead of those big bulky resistor used on the website i posted on "upgrade your ESC" ), and those 3 leds on Mini-Z controller is used on my home-made bulb discharger to show how low the power on the battery still remains before unplugging it

have a safe trip man

-æ


guys, right now i'm working on an all-wheel-drive micro hummer with removable "powered" single axle trailer!.. the space inside the hummer is too small for my electronics and battery (i'll have those Li-Po batts soon ), so i'll be placing all those batteries (4pcs) inside the trailer! ... actually, i have the Gama Goat on my mind, but hey, there's a hummer with a trailer right? i saw one on CNN so i think this should do.

-æ

[arch2b]

Originally posted by killer
...so i'll be placing all those batteries (4pcs) inside the trailer!...

it seams you and i are onto the same idea , my next project which i've already painted and been doing the planning for will utilize a trailer for carrying the batteries, on/off switch and charging plug!

now if could just get someone to hit me up with a sheet or two of the water slide decal paper...no replies to my post about it yet

[killer]

Originally posted by arch2b
it seams you and i are onto the same idea , my next project which i've already painted and been doing the planning for will utilize a trailer for carrying the batteries, on/off switch and charging plug!

now if could just get someone to hit me up with a sheet or two of the water slide decal paper...no replies to my post about it yet

:ö:

Using the trailer is not a bad idea right? , but!, we cannot use the truck without the trailer! , using small size battery such as Li-Ion or the Li-Polymer batteries is the answer, but i don't want to spend more money for another battery , right now i'm thingking of making my own servo to fit my smaller size project vehicles, so fitting a standard size battery (for a 1/87 that is!) is not a problem.

water slide decals?... i thinks i still have some extras left from my 1/24 scale rally cars.. but i'll check first.

-æ

[arch2b]

Originally posted by killer
...actually, i have the Gama Goat on my mind, but hey, there's a hummer with a trailer right? i saw one on CNN so i think this should do.

i saw this and thought you'de like it, they do have trailers!

[killer]

Originally posted by arch2b
i saw this and thought you'de like it, they do have trailers!

:ö: thanks Arch! ,

looks like the trailer is good enough for 4pcs. batteries

-æ

[arch2b]

overlander-
i just checked your album, very nice work! what are you using for the tubular frame? and how fast does it go?

[Overlander]

Hi Arch,
The tube frame is made for a t-maxx.

All of my trucks are made for trails and rock crawling so this one is very slow and tourqie.

-Todd

[arch2b]

overlander-
believe it or not, i still can't get the spur gear off the faller axel. i don't have a vice so i've tried just about everything. i might take it to the lhs and ask them to do it.

another problem, one of my rear wheels is very whobbly on the stock axel. what can i do about this?

[killer]

:ö: hey Arch here's the pic of my Servo ESC with resistors..