R/C Helicopter project


#33

Fuel tank is now modeled and located in the frame. Have the tank hollowed out with the shell feature. Rubber mounts to prevent moving around and damaging the tank from vibrations. The top of the tank has a pressure inlet and the side of the tank has the feed for the motor. I still need to add the fuel tube adapter to allow a feed line to be connected.

I will now add servo motors for the throttle and tail rotor.


#34

Here I have added the Throttle Servo as well as the Tail Rotor Servo. They are in their approximate locations and it is possible they could move as the model evolves.


#35

Over the last two days I exported all parts and imported then into Fusion 360. I then aligned all parts and added colors that closely represent how this model may look if it were real. I then rendered them for only a short amount of time (10 minutes max) just to get some rough lifelike images.

Maybe once I fully align the parts properly I will spend the time for a high quality render. For now here are a couple images. I will also get a couple close up renders for the next post.

NOTE: 100% Designed with Shapr3D and rendered with Fusion 360.


#36

Here are 4 close up renders, I let these ones run for about 25 minutes to bring the detail up some. The third image gives a good view of the motor mount, fuel tank and servo motor. The fuel tank is translucent and has a pink shade to it. The reason I went with the pink is the fuel is pink, so it almost looks as thought it has fuel in it.


#37

Here we have a few small items modeled. I modeled the front and rear canopy mounting posts, there are some oval tabs that they mount too, the idea is in a crash the tabs would fold and break rather than break the frame.

Also modeled are the bluish/purple parts on each servo. These are mounting tabs so that the screws won’t pull through the rubber grommets/mounts.

As before, these parts are positioned where I believe they will go, this may change as the model evolves.


#38

For anyone wondering, the fasteners are downloaded in step format from McMaster.com , and any mating parts that have threads, those parts were imported into Fusion 360, threads added, then exported back out and brought back into Shapr3D.

All modeling is done with Shapr3D. For the renderings I am using Fusion 360 on a Custom PC.

Here are the Specs of the custom built PC:

  • Corsair Graphite Series 780T
  • ASUS ROG Rampage VI Apex
  • Intel Core i9-7900X (OC’ed to 4.6 GHz) 10 Core (20 with Hyper Threading)
  • Corsair Hydro Series H115i Extreme Performance Liquid CPU Cooler
  • Corsair Vengeance LPX DDR 64GB
  • EVGA GeForce GTX 1080 Ti SC2 HYBRID, 11GB
  • EVGA GeForce GTX 1080 Ti SC2 11GB
  • 3 x 1TB Samsung 960 Pro NVMe M.2 SSD
  • 500GB Samsung 950 Pro NVMe M.2 SSD
  • Corsair HX1200 Watt PSU
  • Windows 10 Pro x64


#39

I have now added the remaining screws that I left out. I have also model a small capture nut/plate that the servo screws tighten up to. These pieces have have a nub on them that catches a hole in the frame to assist with centering and tightening up the bolts.


#40

Here we have the elevator controls modeled and installed in its approximate location. It has a max of 21 degrees of movement in both directions (up or down). Here are a few screen shots.

Note: As stated before, threads are modeled with Fusion 360, all other work is done with Shapr3D. The model may also change as it evolves.


#41

Here is a quick look at what I have been working on. It’s almost ready to add to the helicopter. Once I get this complete, I believe I will be ready to start on the tail parts.

UPDATE: I got the parts into the model in there approximate location. Getting so close to finishing this portion of the model.

I just have servo links from the motor to the bell cranks. Some misc. adjustments. Then I can start the tail.


#42

I am now working on some of the remaining links from the servos to the bell crank assembly I just did. Here is an example of this on the left side of the helicopter. I will add the links from the right side when I am complete.

UPDATE: 2nd photo has been added with the links from the right side.


#43

Here we have the fuel tank nipple. This is a push in design that is held by a web in the middle, similar to the ones on each end that hold the fuel line on.


#44

Now that the bulk of the work is done on the main portion of the helicopter I imported all the updated parts into Fusion 360 and prepared a few renderings to share with everyone.

Next up is to start modeling the tail gear box, tail boom and tail rotor assembly.


#45

I now have the gear box modeled, as well as the approximate length of the tail boom. The parts in pink are temporary place holders as the actual gears should be there. I haven’t started the gears yet. The tail boom is keyed so that it can be located by depth as well as prevent rotation.

As before these parts could change as the model evolves.


#46

Here is another screenshot of the tail gear box in its approximate place on the helicopter.


#47

Here we have some bevel gears added. I am still very new to modeling gears and I know there are equations to creating bevel gears. However, for my purpose here, I just want them to look visually good. They may not be accurate to what would be used in real life, but accurate enough for the models representation.

So after much trial and error, I figured out how to get the angles needed by using the project tool. Once figured out, it made easy work of getting the look needed. Then I was able to use the scale feature to get them visually the matching size to the model. Here are a few screenshots of the results.

The bottom two screen shots show the sketches I used with the project feature. It’s a crazy mess of lines. But it worked. I’m sure there’s a better way. But once I got started it made sense to me.

I’m not happy with the other gear, and will likely rework it at some point.


#48

Here we have the drive shaft for the tail rotor modeled and in place. Still need a couple support bearings in the tube.


#49

Here we have the gears positioned now.


#50

Here we have some work on the tail boom supports and the control rod. There are now 507 parts to this model. And if I had to guess, I would say I have about 100 to go.


#51

Here we have the boom support clamp and horizontal tail fin. The fin is non functional and there for aesthetics only. The boom supports are now in their approximate location as well.


#52

Here we have a quick render of the model up till now. This was done on my Mac which is no where near as powerful as the custom PC I typically use for the Renders. But I wanted to show a quick look at what it should look like. When I get further along I will do a high quality render.