Monster Race Engine Roars to Life in Tiny Bush Plane 🤩 Part 1 | Scrappy #32

i think today's the day i'm going to start it scrappy you ready it's physics math and engineering machine it draft it build it test it break it every time something new gets built the entire world advances laying in bed at night it's designing new parts designing new suspension designing new wings hey guys all right for those of you who have never seen one of my videos let me tell you what we're doing today we're going to fire up an engine that's going in a plane about this size [Music] but this one right here and it is a little non-standard so i like to build crazy airplanes and i like to go after world records and try unique different things in aviation and then put on a parachute and go fly it i like to do really fast planes and i like to do slow flying extreme mountain planes this one is probably one of my most extreme so what we're doing today is we're going to fire up an engine and kind of put it in perspective it's 780 cubic inches that is nearly 13 liters and for me i have to go back to when i was 15 years old building race motors i thought a really cool chev 350 was a pretty big motor and it moved a 5 000 pound truck well if you took that motor and then another chef 350 that moved a 5 000 pound truck you squeeze them together you still aren't as big as the motor we have just put in a plane about this size that weighs less than 2 000 pounds so we're talking something designed to move ten plus thousand pounds in a little itty bitty bush plane it's really not practical but let's get it started so i'm super excited about it um it's open pipe it's loud it's a drag machine the engine actually usually goes into big giant crop dusters or into twin engines for moving a lot of people and we shoe-horned it in to something this size so i'm excited we're going to fire it up for the first time i hope you like you follow along i like to build crazy machine let's get this one running all right guys i'm getting closer and i think today's the day i'm gonna start it so the exhaust isn't done but i've got my old set of headers i made and they're right here these were a lot of work because i actually tuned them which just means i didn't need normally you might not see these loop back like this the purpose of doing that extra work is to get the engine to run better smoother and actually you'll hear it in your ear you might not know why one engine sounds different than another but it's kind of like listening to it a key on a piano if it's right or it's wrong one just sounds pure and one doesn't and i'll describe why and you can see it might be easier just to run this pipe and have it skip right into the collector versus return backwards and what it's actually doing when i made this is it's timing up the pulses of the exhaust blasts that are coming out the exhaust valves if you don't have them at the same length meaning one short and one's long depending on the timing and which cylinder an explosion can go off and then right after it the next explosion because of the pipe length they run into each other at the collector meaning now you got two explosions merging together coming out the pipe and you hear that in your ear and it sounds different it also creates a non-stable back pressure where normally it's one another in another so what i've done by making those pipes is i've lined up the exhaust blast so one goes out and as it goes into the collector right as it goes by the next blast lines up behind it behind it behind it behind it and they draw each other out so the back pressure stays the same on one cylinder versus another cylinder which makes the engine more smooth and more pure [Music] uh i think you'll hear it when i fire it up it's a lot more work i'm gonna buff and polish these up it is scrap parts for scrappy this came out of the racer so for today i just cut off the end i'm going to put some kind of hokey little down spout on it because i'm not going to finish making these right now i just want to fire it up so i'm going to tip the pipes down so i don't blast my firewall and uh if all goes well let's start this so i'm starting to clean up my mess tying in all my egts and chts so i am going to put one on every single cylinder i've done something i've done on all my planes just prevent the wires from getting strained on them and pulling apart just with vibration of light so this bar you see right here is actually just a really thin wall hollow aluminum tube that i had anodized i've hooked to my cylinder headlockers i machined and this way when i get all the wires done i have something rigid i can zip tie to so that there's no strain and i'm not just hanging the wires on all the other wires i mean that does work and people have been doing it that way for a long time but i kind of like hanging the wires from a bar and then letting each one of the wires just sit loose so it doesn't the weight of all of them don't hang right now they'll be eight sets on this side eight on the other i'm only a quarter of the way done let's get back to work so i'm getting the cables hooked up now and i want to show you something really simple and i only pointed out because it's happened twice where someone asked me some advice about their engine and why it was running a little off and what i mean by off is they get in turbulence and they they thought the engine was going up and down in rpm and they thought there was something wrong with the engine and what it was is they have their cables they didn't give them any relief where i've got this bending down and back up coming into the side of the engine and so as the engine hits bumps or heavy g's or they pulled heavy g's it was actually putting a little tension on the cable and pulling the throttle so they'd go in the bumps and the engine would pulse with the bump so make sure you get a little relief in it the other thing i like to do if possible it's not always possible i always try and bring the cable out in line and closer to the center of the the motor mount this is a little bit low of center but the closer you can get it and then of course in line is better because you got you have less kinks but the closer you get to the center the more the bumps the less the movement in the cables i'm just tying this in but now i'm getting to this corner over here where i've got to turn and go over to the mixture and the throttle and so i may machine these up out of stainless steel they're on ball bearings and they're really smooth rather than just a bushing i actually did uh ball bearings press fit and then machine little spacers that gave the space i want this will bolt into the bottom here and that way as i'm going around the corner rather than bending a cable i'm going right to a solid fixed point off a solid fixed plate that's that's mounted to the oil pan and then this has no drag i mean i can put all the pressure i can physically put on it and you can't feel any drag with the ball bearings in it so one will be the mixture and you don't know if you can tell but they're all different lengths so long and short and what i've done there is it's kind of sometimes it's you'll get a throttle and it has a tiny bit of movement and that's kind of hard to fly in the bumps because a little bit of throttle movement moves the throttle from zero to full and other planes that got the other way around where the throttle's got to go really long ways and so what i did is i set up the throttle back here and match the pivot fulcrums on the corner i use the corner to adjust my throw so what will happen is my throttle here will use approximately 90 of its full throw i don't want a hundred because i want to make sure that it doesn't stop it this bolt or this bolt i want it to stop at the throttle body so this is going to come almost to the end and touch and almost to this end and touch but it won't touch that bolt it's going to touch the stop at the throttle body same with the mixture and to get that right since they use different pivot points and the throw at the throttle body is different these are all different lengths correspondingly so that i have even throw all the way around on both levers and it's not just tiny movements so anyway it's a bit more work to just make that extra step but it feels good so i'm gonna put it in once i get around that corner it won't be a table it will be a solid bushing rod that connects it with no play so you will not feel any play in my cable at all anyway i'm gonna get this installed let's get back to work [Music] yep i found it more scrap parts for scrappy [Music] all right guys i got my scrap piece of wire the wire i pulled out of the box is actually from my engineering firm a few years back that i sold it was a wire for a 600 volt battery pack for an 800 horsepower electric hybrid truck concept design that we took to the detroit auto show i was the right gauge i needed perfect shape i just needed to shield it so i quickly used um some heat shrink two stepped it so the first time i heat shrink was after i crimped the end i heat shrinked the end to the wire itself then i sleeved it and then i got a longer piece of heat shrink and i hate shrink from the other heat shrink three inches overlap of my productive abrasion shielding so and this heat shrink has a little bit of a hot glue in it so as it melts it actually melts into the weave of my sheathing so you can't pull it out no matter how hard you try it's actually become part of this protective sleeve um on the wire this big that can carry this many bolts the last thing you want is it to get an abrasion through it and then hit the start button and literally weld something so this is my last scrap part wire that needs to go on the plane before i can hit the start button let's get to work okay guys i'm getting ready to start this up for the first time so assuming this starts what's going to happen we're going to blow a whole bunch of smoke i pickled the engine and i filled it up with a fogger oil into all the cylinders so we got to blow that out so i'm sure it's going to cough and sputter but let's cross our fingers that it starts please work why is it it's always in the middle of the night we're starting an engine up for the first time that's what you're worth good point you guys clear there clear prop [Music] [Music] so foreign

Channel: Mike Patey

Views: 1,118,465

Rating: 4.8362775 out of 5

Keywords: Air racing, turbulence, Draco, wilga, mike patey, STOL aircraft, Bush Flying, Flying Cowboys, Mark Patey, Mike Patey, Pylon Racing, Patey Twins, Fastest Turbo Prop, Turbine Lancair, Turbine Legacy, Hillside Landing, Crosswind Landings, Water Landings, Water ski airplane, Best tugs, Grip lock ties, Back to work, Carbon Fiber Molds, Carbon fiber layout, how to carbon fiber, custom parts, world record aircraft, experimental, super cub, engineering, how it's made

Id: 0fUMXe13lfw

Length: 13min 49sec (829 seconds)

Published: Thu Nov 05 2020

Reddit Comments

[u/preruntumbler]

So rad