Articles

RC ADVENTURES – TOYBOTA PROJECT – PT 8 – BBC TOP GEAR TRiBUTE BUiLD – TOYOTA LC70 TRUCK-BOAT

September 4, 2019


– Alright! So back with the Toybota. I know I’m stuck on this truck right now. It has been years since I’ve
done an extended build project. But I’m having a lot of fun with this. I see the potential to
cross the pond. (laughs) If everybody had a chance to
check out the maiden voyage you’ll see the type of
adventure we had that day and you’ll see that I also had some things that I wanted to repair. It was uncanny how many things
actually turned out to be like the first Toybota episode with the Toyota Hilux being used. Right up to the point
where we were leaking, taking on water, I was
having propulsion problems, straight through. But we made it back. We were able to make it back
to shore with these tires. I did order 1.9 size
paddle tires for the future because I do wanna do a test to see if paddle tires will
actually make a difference over just regular treaded tires. I wonder if it’ll make
such a huge difference that it’ll be even noticeable. The other issue I thought I had
was with the outboard motor. And it was. It was that I thought I
was getting water inside the motor but after reviewing the video while I was editing, I don’t think I got any water inside this electric motor anyway. And it shouldn’t make a difference because it’s a sensorless
brushless motor which should be able to run inside submerged
water no problem at all. So I thought to myself it
must’ve been an ESC problem, like maybe I was getting a
problem underneath the seat here where I put in the
electronic speed control and I was having some water issues there. And it wasn’t. So I thought to myself what could it be? And it must’ve been
something that I’ve done. And it was! I missed out on one of
the most common mistakes that I could’ve made for
running multiple ESCs. And that’s when I was running a ESC just for the truck itself, that was being plugged into the receiver. When I ran the ESC for the motor and I plugged that into the receiver I forgot to unplug the red wire. Now the red wire from this
ESC into the receiver itself is a power lead which is designed to
power the receiver itself. Because I was getting power from the other electronic speed control running the truck I think what I was doing was canceling out this
ESC once it warmed up. So I have rewired it. I took the red wire out of this
one and left the black wire, the negative signal wire, and the white signal wire for
the radio control command, left that in place in the
receiver and just removed the red. Now, there’s one more
thing I wanna talk about and we’ll go over that
other stuff in a moment. But the other thing I
had a problem with was my back tray was actually leaking. Just like the original Toybota I was starting to take
on water from the back, I had thought. Well that’s where it
was starting to collect, at least back here. Let me move this hose out of the way. Back here, everything was, you know I noticed when
I first started floating that the truck was
actually a little lopsided and that didn’t make sense because I had done a float test prior but I was excited and got
out onto the pond there to do the quote “channel
crossing” for you guys and I didn’t realize that
what was happening was I had a leak that was letting
water in through the bottom. Here is a Windex bottle, right? This thing is quite long and
I wanna get into the weight of how much this truck is. And the reason I wanna bring that up is if I had a hole in the tray,
with the weight of this truck even with the pontoons that are on here, it was forcing water up into the tray and of course that’s how we started taking on water. So two problems, or multiple
problems I should say so. One, was the wiring issue. Second, was the leak issue. So I got the battery
cable hanging down there. What else did I learn about this? Well, the maiden voyage was
an epic time to be sure. A lot of people were talking about the pitch of the actual motor or the placement of these pontoons. Now if you actually
watch the build series, or you had been following
along in this series, you’ll know that I actually
had the pontoons level just like Jeremy Clarkson
did in the second attempt at his car/boat challenge
which was the Nissan and they were actually
level mounted up on bars and they could actually
flip up and be deployed. Well, I actually have put these in on a little bit of an angle. And you’ll see the way
it’s actually floating in the video itself, actually has the back tray of the truck quite higher than the other one where Jeremy was in. A lot of people mention the pitch. The reason I have the
pitch and the pontoon the way I have them now, was for when the boat
is being thrust forward, of course it’s pushing
this whole truck bed down. Now I only have, what is
that, like an inch and a half of clearance there? So it’s a very, very, it looks like 2.5 inches from here. But just the tray is much smaller. When that gets pushed
down and the water line is riding right about here, there is a fine line in throttle control. In the second episode of Top Gear, when Jeremy is actually
crossing the channel to beat Beardy Branson’s time, over to France there, you’ll notice that they joked
about the speed of their boat because they couldn’t
really change the velocity. They had a constant velocity. I don’t know how many knots they were actually traveling. I think they did mention it, but when they were joking about it, they made it quite inflated. But you’ll notice that the Nissan actually doesn’t move that much faster the entire journey. So that’s the secret. Because this bow or because the stern, pardon me, is pushed down from the outboard motor, this bow actually rises. Now, you don’t want it to
actually have too much thrust pushing this under the water. But at the same time, you
can’t have this too low because what happens is the water will start coming over the top. Normally I have this, this
isn’t mounted properly right now, it’s a little bit high up there because it’s not on the post. But, you’ll see in the video, I actually have this taped off. Now, this, even at this height, this would be a little bit better. Because I would have an up slope instead of just flat against the nose and over here. So you really have a fine line of plowing the water or being too aggressive in having the back tray go underwater which you want to avoid at all costs. That is why I have the outboard there. And we’ll do some tests in the future to kind of show you guys the differences in how that’s changed around. But I wanted to give you
an update on the things that I have learned. Hopefully you’re following along with what I just said. I know it’s a little
bit on the crazy side. I am totally infatuated with seeing this actually cross over. I did change over the water release area. Even though I kept it right here, this is the water cooling. It comes up through the back, around the motor jacket, out through the ESC under the seat and out through the
side with the hot water. I did add an extra
spout so we can actually get it farther away from the boat. We don’t have to worry
about anything trickling back in there. Yeah, what can I say? I just want to mention in
case you guys don’t know. In the last episode, when
I was doing the maiden, I actually used the
large piece of foam board under the back bed to
give me the extra lift. Plus I added in a huge
piece of pool noodle there that also helped give me lift. All of the cab is full of foam. These are full, this canister here, and this canister here, both locked on. One to the chassis, one to the topbody. Filled with foam and sealed air. So we have plenty of flotation. Let’s talk about what I’ve added extra. And of course, to overcome, you guys have noticed I moved
this hose out of the way. I didn’t have that there last time. It’s cut on a bit of an angle there. Gonna put that down right in the corner. So any water that gets
put into this back bed is going to be automatically pumped out. Jeremy Clarkson style. I went huge on the pump. In fact, this pump right here, has an inlet and an outlet that goes to this fire cannon. Now, I’m going to attach
it a little better here. But this is really just to shoot the water that is in the back tray, away from the truck. Who remembers the fire rescue
boat video I did with my son? So many people saw that video, about 8.5 million people. But guys, this is not
the fire rescue boat. That is actually my very first one. The one I did with my son is
safe and sound right there. But this one I had in the beginning, that I lost the top on. I was able to take the
fire cannon off of it, take the pump out of that, and repurpose it to
the Toybota right here. So it now (laughs) I have an enormous pump on there which really doesn’t add
a whole bunch of weight, but will allow me to remove any water that’s in the tray. How will I be able to see if
there’s water in the tray? Well, I won’t really be
able to unless I put in a first person view system
with long range on there, which is possible. But I will be able to tell by the way the truck is listing. Okay. Just put a couple of zip ties
on the front bumper here. Just so I didn’t add too much weight. Out on the fish scale,
let’s see what we got. 13, 12. 12.13 pounds. So that’s quite a bit to
have to float in the water especially with a very small base, right? Kind of looks like the
Starship Enterprise. Of course this project
is complete rubbish. (laughs) It is totally Top Gear style, of course. You know, and I think it’s hilarious just to see how heavy it is, to see if we can actually get it to cross that half a kilometer of pond water. That pond itself I gotta say, is just over 25 feet deep. So quite a bit. I’m glad we got the pump on there. There is a point of no return, though, where this back end starts to fill up so much with water, that it’s just going to
go under the surface line and a pump is just not gonna help. But if I catch it in time, and because I have a variable
speed pump right here, set up on the radio, I might as well like
demonstrate it for you here, since I haven’t tested it either. Speaking of which, check it out, this why I
have this lid off, okay? So for this pump to run, and to pump this water out of the truck, I also need a separate
electronic speed control to run it. Now, I have it right here which is right beside
the truck speed control, so that equals three ESC’s. Three batteries, one battery right here, that’s independent and runs
the LED bar at the top. Is it necessary? Completely not. (laughs) This is in excess. That’s why I’m being silly, right? I could make this so much lighter, but this is an actual trail truck that I would take out there, go trailing with, you know, and plus, then I could go into the water if I choose and cross the river in the most ludicrous way. They are sealed bead locks for the people that said could
you put air in your tires? The answer is yes, there
they are, already sealed. And, let’s like I said, plug it in, I’m gonna show you how everything works and we’ll move on from there. Okay, just to show you how the pump works. There’s a red and a black wire
that come through the body. I drilled it through yesterday. It’s mounted with the
black and the red wire and can be detached, if I want
to take the whole lid off. So what I’m gonna do is
just plug in the pump motor for you right now. So with both of those wires connected, it comes down to a separate ESC, which is just a small
ESC that I grabbed from the fire rescue boat. That is sitting right
beside the original truck electronic speed control that I put in. And because they’re so close together, and the pump ESC is really not drawing a lot of power most of the time. I just simply harnessed it
in to the main truck battery. Okay, here is the radio. I really simple on this
side, I’ve got the two stage transmission, which is high and low. I can show you on this side, even though I could
switch it to this side, and may, just to make this high end low. But, forward on this side is up and down, back and forth again, it’s in high gear right now. Switch it to low gear. Forward, and backward. And then of course, left
and right, left and right. Same with the outboard on this side. It is left and right. And of course, forward throttle can stay at a constant velocity because this side is not on a spring. This side does have an adjustable spring just to let you know. (engine whirs loudly) I won’t run that too long because it is water dependent
on the cooling system. So there you go. And on this side here is
the lever for the pump. (lever whirs loudly) Which is also variable speed. So what I’m gonna do, is dump some water in the back. We will have a little bit of a leak because I haven’t attached the back screw down to the post. To make the seal there. But not a big deal. We’ll get a good idea of how quickly that pump gets the water out. I’ve never done this before, so I’m excited. I want to see how quickly we
can empty out the back here. Okay, now in theory, the hose for the pump is at the lowest corner. This is where I saw it
leaning on one side. Now, I should have it right in the middle, but of course, I was a dummy
and sealed up this area so I can’t get to it
without breaking that seal. But I’m happy to leave it as is and just have it on one side because it only comes forward a short bit until both sides are full anyway. So with all batteries and
everything plugged in, I’m gonna go ahead and dump in the water. Going onto both sides there. So this is actually quite a bit. One whole bottle. Let’s see, let’s get the pump started. Three, two, one. (engine whirs) (laughs) Look at this, holy cow. It’s shooting right
over to the skid steer. Nice job. Getting rid of the water
in the back, almost empty. Still shooting out. (engine whirring) That is just too cool. So I’m emptying out, almost to the bottom. And no pressure left. So the only bad thing with that is that I lose a prime, right? Like I was moving the cable around, and one of the times that I noticed, is that if this loses prime, then it has a hard time turning back on. So I definitely want to figure out a way to keep water in this. Maybe I need a primer bulb
or something like that. I’ll have to figure that out. A few of the viewers asked
if I could actually take this radio antenna and move it over, and have it running up the snorkel, which I think is an amazing idea. And yes I could do that, but I actually have the
way I had it precut out in the foam already. Was put right in the middle, but yeah, that could be cool. I could relocate it over
here and run it up the spout. That would be pretty, pretty neat. Tried to keep most thing centered overall. Even though you see that this part here is a little heavy on this side, we’re actually running
the battery more staggered on this side. So being the lipo, it actually offsets everything nicely to the middle of the truck right there. Some of the viewers questions included, things like the bow. Instead of pushing the water, why not make a V on the front to cut through the water and slice? And I agree. I could totally do that,
but just keeping in tribute to the Top Gear series, I didn’t want to put a bow on the front, like Richard Hammon’s van. I wanted to kind of keep it close. Now if you looked at the first Hilux, we didn’t get a look at the underside of the Nissan. But the first Hilux
actually had a skid plate that went from the front bumper, all the way to the back and
it actually came to a bit of a bow in the middle. Which was very interesting. And yes, I do like this though. You’ll see it does angle itself as we go, and as it does float in the water already, and since the nose gets pushed up, it does tend to want to
float on top of the water. Which is very nice. I do notice it. Overall, I think the
truck itself is fantastic. There are a few things
I need to learn about, like how to keep that pump primed. If you guys have an
idea on how to do that, please leave it in the video
comments section down below. I don’t want to have any water back here, or at least a very little amount, right? Like, I understand some is
gonna have to be back there, but I want to remove the
half inch that remained. Jeremy Clarkson, if you’re watching this, man do I ever understand the challenges you guys had trying to
get this thing to float. Normally, you do it in model scale to see if you can do it in full size. This time, we did it the other way around. You did a full size. I’m trying to see if I
can do it in model scale. Here is the outboard motor that is supposed to
represent the 225 horsepower Honda engine he had there. This thing weighs a lot. Right? It’s all alloy on here. A ton of weight. The way I have it set up on the back, Jeremy I understand. You wanted to have two of
these on here for power. But the Toybota you know, like you said in the show, the waterline just won’t accept it. So, I do have it very close
to how you guys had it in both shows. I definitely think a constant velocity on the throttle will help me make it across the pond. Definitely let me know what you guys think about this whole project. I know it’s harebrained, I know it’s just
completely as Jeremy says, complete rubbish. But I’ve just had such a good time on it. Are you guys still with me? I know I’m stuck on it. Are you stuck on it with me? Let me know in the video
comment section down below. Like, comment, subscribe. You know the deal guys. Now get outside and have
fun with the hobby of RC. Until next time. We’ll see you in the next episode. Bye bye.

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