How to manage complex designs. (our favorite CAD feature)

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[@brois841]

So interesting to watch the usage of Git in this type of platform and the terminology used. All software engineers use Git for source code management, for exactly the reasons shown here, fun to see it applied to CAD.

[@hyperthreaded]

Does Onshape really use Git under the hood?

[@GOAFPilotChannel]

@@hyperthreaded Almost certainly not. Git is not the only VCS with branching.

[@simpilot001]

“The process of designing retractable landing gear is actually pretty challenging.” I never would have thought

[@DarkAeroInc]

Who would have thought. :)

[@simpilot001]

@@DarkAeroInc dunno. Someone who has designed retractable gear before. Of perhaps a team of four engineers

[@orppranator5230]

The process of designing a anything in cad is always more challenging than it seems :)

[@simpilot001]

@@orppranator5230 great. In which case not wanting to get a cad program as much now

[@gouthamkumar1750]

when it comes to designing Low weight critical components it's always challenging

[@clydecessna737]

A well produced video, educational and entertaining; thank you.

[@luizazzi1993]

Yeees!! I've been waiting for another video. Love u guys

[@DarkAeroInc]

Hey thank you for patiently waiting and for tuning back in! :) We've been busy. We have some more videos coming up in the next few days so be sure to check back!

[@OnshapeInc]

Great work!!

[@gerhardusoosthuizen0]

Basically git for CAD, really cool, thanks for sharing guys!

[@timoja2538]

Great video discussing CAD features! Being a pilot and having background also in maintenance, can't help thingking your design also. I suggest dust/ sand protection for your actuator gears.

[@TheDIYer]

Wow I didn't know onshape was so much collaboration ready ,looks cool ,I can imagine that cad took many many hours of thought and work and thought and work

[@TheArsonsmith4242]

I think you should call the arms "Hydrocoptic marzelvanes", the way they are fitted effectively prevents side fumbling.

[@DarkAeroInc]

I never thought of it that way. The “arm” name is s carry over from our original design which had a base plate of prefabulated amulite, surmounted by a malleable logarithmic casing.

[@isaactavares1767]

I stumbled in your video while searching info to learn about over center mechanisms and linkages. The fundamentals and how to design and simulate in OnShape. Just for fun, kind of a hobby (I’m only a mere FSE). I wish I’ll have a tinny fraction of your mechanics knowledge an OnShpe knowhow. I’m a newbie and self-learning OnShape user. I followed the link to DarkAero1 web page and I was amazed by the airplane specs. Aeronautics was a not fulfilled child dream unluckily (62,5 years old now). You - DarkAero are pushing the limits. Pushing limits is the engineering advancement engine. SO I deeply wish you an huge success (technical and economical) whit this project. All the best for you guys.

[@mikespencer237]

I'm an airline pilot and also mechanical engineer. One plane I used to fly was the Swearigen Metroliner. The torque links for the main landing gear were behind the oleo strut and and also the props wash against them. The dirt and debris would pit the oleos and they would always be in a state of leakage and deflation. I know the nose gear strut gas spring of the Dark Aero is recessed within the nose gear trunnion but it might be helpful to locate the torque link in front of the telescoping strut to better protect it from said prop wash and debris? It looks like there is room to move 180 degrees to the front, just a suggestion. Love the videos and the plane looks awesome!

[@deeneogden6804]

)

[@DarkAeroInc]

Hi Mike! Thanks for watching and for the suggestion! Your comment highlights the struggle we face while coming up with these different designs: there are many different conflicting requirements to weigh out and balance. As you pointed out, the gas shock for our nose gear sits inside the trunnion halves and telescoping strut tube, so all the critical surfaces and sealing components are already protected from debris and prop blast. The torque links were located on the aft side of the gear assembly because this arrangement offers some manufacturing advantages. There is an eye on the aft face of the aft trunnion half that the drag links attach to. The addition of this eye means we have to machine the trunnion half from a billet of aluminum that is ~0.5" thicker than if there was no eye. As long as we are machining off all this excess stock just to add in the drag link eye, we can also add in the eye for the torque link with no increase in machining stock. If we were to move the torque link to the forward trunnion, it would mean wasting an additional ~0.5" of machining stock to add this feature. This extra thickness in the billet amounts to over 4 pounds of aluminum that would be wasted. Kinda tricky to describe in text so hopefully I didn't cause confusion with that explanation. :)

[@mikespencer237]

@@DarkAeroInc Makes perfect sense, thanks for the reply, can't wait to see the Dark Aero fly!

[@justindyster7073]

Love it! Thanks so much for sharing this with all of us. I would be very interested in understanding how you’re addressing your serviceability requirements of the Landing Gear Mechanism, especially the gearbox. As a Piper Comanche 260B owner gear serviceability of a 50+ year old Airplane is very important.

[@johndestories9550]

(2) suggestions: Your torque link loses rigidity when it is that vertical, and I understand that you have a CNC, and want to use it, but I have never seen a two part strut housing. Tube is way stronger, less likely to leak, and cheaper to produce. Just find a Hydraulic shop that manufactures cylinders, and can re-chrome stuff. Otherwise, I love what you are doing!

[@DarkAeroInc]

Thank you for the suggestions John! You are correct that the torque link has less rigidity when it has less scissor angle. However, what is important is that it has sufficient rigidity to achieve the intended function, which ours does. Using longer torque links that are less vertical would just add excess weight, which is why ours are as short and vertical as they are. Our strut housing is indeed unique. There is no concern about leaking from the housing because it isn't sealing anything. It is formed in two halves because it encloses a standard off the shelf gas shock, so I think we might already be doing a version of what you are suggesting in terms of outsourcing the shock absorbing hardware in the nose gear.

[@forgeperformanceand4x4]

With your emergency gas struts, they are over center so when closed they hold up the arm, which can be beneficial but in your case you are using it as an emergency option so you need to have them loaded when retracted

[@pr4wn5tar]

Whaaaaat branching in CAD! ? With merging!? This is so cool, these guys are really getting it right

[@jamesb.9521]

Hi. First of all, congratulations on your excellent work. I was wondering, what prevents the landing gear from losing the desired position during landing. Isn't a locking mechanism between the upper and lower drag links (e.g. in the connection joint) necessary?

[@palletcolorato]

Mind-blowing! It's amazing how engineers calculated all of that before "OnShape" or "CAD".

[@michal5642]

alot of the time they would plan it out on paper, but then just machine out a prototype and see if everything works CAD allows us to skip much of that

[@shanakaliyanage6875]

Collaborative development and version controlling are pretty much basic standard practices in software engineering. It looks like these principles can be really useful in other disciplines as well. Being a software engineer with an interest in mechanical engineering I can see that OnShape has a very good future and also seems to be pretty well-designed.

[@captainofiron]

right now Onshape is really the only MCAD that is doing this, and having used it on a couple of projects I became a big fan, just picking a surface or a feature and being able to comment and assign to another user (a la g-suite) is such a game changer, no more screen shots and drawn arrows in an email, just direct collaboration within the toolchain. Epic

[@mateuszsierakowski4428]

That's really nice, like a git for cad software, I was always wondering if something like that exists, because I didn't see any options to do that (with Fusion 360 in my case). Btw I'm really curious about the simulations (CFD simulations for example), do you use them, and how often?

[@DarkAeroInc]

That's a good comparison. The branching and merging functionally in Onshape was adopted from the coding/programming world. We did a video about simulation a while back: kzbin.info/www/bejne/nZuxgXh6d8qciqs Thanks for watching!

[@deeplato5647]

*GREAT EPISODE* Maybe the unnamed components left and right = trunnion mounts

[@gouthamkumar1750]

Can you make a detailed video on CAE analysis of those components please....

[@johnfitzpatrick2469]

G,day Riely from Sydney Australia. Absolutely at oar- with the CAD program. Big different from isometric, orthographic projections (that's ink on paper) But, seriously the revised landing gear arm looks more durable because of less parts, thickness increase and quality pivot points, great work. Thankyou for your commitment to quality education during covid-19 World pendemic. 🌏🇦🇺

[@DarkAeroInc]

Hello back from Madison, WI John! Thank you for the kind words on our work and for continuing to follow along!

[@QwertyCanada]

Glad to see Aragorn using Onshape too. Been a big fan of him since Lord of the Rings premiered.

[@The_R_Vid]

I'm assuming that the nose wheel is free castering, and it's alignment during taxiing is due to trail, and steering would be accomplished by differential braking. When the nose gear swings up, the caster will tend for the wheel to swing around and down before it tucks up in the airframe well. Is there something to prevent the limit of the castering, or to ensure the nose wheel is centered as it lifts into the airframe?

[@davidawaters]

Good question, I noticed this too. Maybe the wind will keep it centered? Or there is a return to center mechanism that we aren’t seeing?

[@DarkAeroInc]

Hi Arvid! We get this question often. The nose wheel is castering but not "free" castering. There is an adjustable nut on the pivot axis of the fork which imparts friction into the fork pivoting action. This serves two purposes: it acts as a shimmy damper and it also prevents the wheel from flopping around backwards during retract operations. The break out force to rotate the wheel/fork assembly is around 10lbs when you push laterally on the wheel. This arrangement is similar to what is seen on the nose wheel and fork of the popular Vans RV kit aircraft or the Cirrus SR series of certified aircraft, although these airplanes are fixed gear. A good example of a retractable nose gear fork similar to ours can be seen on the Rutan style canard aircraft. The wheel and fork is pointed straight as the aircraft leaves the ground and the friction nut keeps them in position. There will be a "wedge" feature on the nose gear doors that will act as a guide to correct small angular misalignment in the wheel and fork. Thank you for watching and for the question.

[@simonbaxter8001]

@@DarkAeroInc How do you control that friction over time? Even the RV method loosens with usage, but not to the point that you get bad shimmy, but would be enough for the weight of the wheel and fork to 'flop' over during a retraction! You really need a positive cantering spring arrangement to be 100% guaranteed that it always centres or is at least in the band required for the centring 'wedges' to catch any offset.

[@solidkreate5007]

Hey what finish is on that 16Ra or 32Ra ect? I like it, I'd like to call it out on my Lee Pres tooling I designed in CREO 8. I'm starting to learn OnShape for myself now.

[@cincinus50]

What allows the front wheel to turn for taxiing but then not allow it to spin or droop down when retracting up into the wheel well?

[@KenLeonard]

With electric motors or actuators, what is your backup when the motor fails? I suppose a free fall backup adds a lot of complexity for an experimental.

[@MakeitModitBreakit]

How are you able to move the parts like this in Shapr3d? I thought it didn’t have the assembly function like solidworks? I’m about to buy an iPad Pro to run Shapr3d and just wanted to confirm you can do assemblies like this landing gear on the iPad

[@harisandronis]

Nice presentation and seems to be very handy CAD! however i don't understand how the steering will happen ;-)

[@NuttySwiss]

How are you thinking of handling a gear extension mechanism failure (motor seized, gear tooth stripped and blocking rotation)? Possibly a gear disconnect option and let gravity plus gas strut extend?

[@sferg9582]

I'm also having a problem seeing how the gas struts are going to help in a gear down failure if still in up and locked position. According to the model shown, the struts in the "up/retracted" position are over-center and are basically at that position preventing the gear from dropping down.

[@forgeperformanceand4x4]

Exactly what I saw, went looking for comments and here it is

[@alicantino59]

To the 2 commenters above: Yes the gas springs are over centre when in the retracted position however the upwards force they exert at that point would be easily overcome by the downwards force exerted by the weight of the assembly in that position due to the very low mechanical advantage applied by the gas springs at that point. This is assuming that a gear disconnect will be fitted.

[@gregseljestad2793]

Nice! Is there anyway the caster can be misaligned when retracking and contact the body when it gets to the "pocket"?

[@DarkAeroInc]

Hey Greg, the nose wheel is castering but not "free" castering. There is an adjustable nut on the pivot axis of the fork which imparts friction into the fork pivoting action. This serves two purposes: it acts as a shimmy damper, and it also prevents the wheel from flopping around backwards during retract operations. The break out force to rotate the wheel/fork assembly is around 10lbs when you push laterally on the wheel. This arrangement is similar to what is seen on the nose wheel and fork of the popular Vans kit planes or the Cirrus SR series of certified aircraft, although these airplanes are fixed gear. The wheel and fork on the DarkAero 1 are pointed straight as the aircraft leaves the ground and the friction nut keeps them in position. There will be a "wedge" feature on the nose gear doors that will act as a guide to correct small angular misalignment in the wheel and fork.

[@vintyprod]

The GIT model should be standard practice for every CAD system!

[@danalex2991]

I'm a mechanical engineer and this is already standard practise in the industry. check in, check out , revise version. When I learned git for some coding projects , I understood this is where it all comes from .

[@vintyprod]

@@danalex2991 alright! do you use regular Git for that or do you have specific software?

[@danalex2991]

@@vintyprod I work at Bosch Rexroth and we use PTC Creo for CAD and versioning software is windchill PDM I think. We use PDM inside creo to handle all this check out check in business in an inbuilt GUI. When I started my career 5 years before, I didn't know that these things were standard age old practice in the software industry done with one liner codes.

[@guillermoplatero1891]

a question u draw each part apart and ensamble all together at the end or u just draw all in ?

[@blahlive8]

How do the gas springs 'fail open' and allow the landing gear to extend if the failure occurs when the wheel is fully retracted inside the wheel well? The direction of the pushing force of the gas springs and the location where it acts on with respect to the pivot point of the strut would cause it to rotate counter clockwise when looking at it from the port side view, which would effetively jam the struts and prevent the landing gear from extending.

[@StefsEngineering]

fun to see the contrast, sensible designs in this development process in comparison to scrappy's awesomeness. Or are you guys also planning a similar double slat morphing wing design? :P

[@DarkAeroInc]

Lol no double slat morphing wing planned for the DarkAero 1. XD

[@StefsEngineering]

@@DarkAeroInc Hehe I didn't expect there to be. Still a cool project to follow, as is yours! I mean, I assume you are aware of Mike's projects?

[@kimjong-un9738]

Looks like one of you guys did FRC with all those vex parts on the gear driven landing gear

[@DarkAeroInc]

Good eye Kim! They offered a good selection of parts that all work together so we could quickly prototype our gear driven solution. We might move to more industrial grade solution for the motor and gears in production. Thank you for watching!

[@atmm89]

how in hell did you learn to operate such a wonderful "equipment", I am in ore with all the help you get today, thank you for showing and demonstrating how you do your designing of your plane

[@humanspirit3432]

Maybe some manual landing gear release mechanism would be also useful. Or only manual (it can be lighter but less convenient).

[@DarkAeroInc]

I didn't really cover it in this video but there is a manual release mechanism. Just a simple handle the pilot pulls in the cockpit which drops the gear manually. A pure manual system would be awesome but there wasn't a good way to implement it.

[@humanspirit3432]

@@DarkAeroInc Cool! : D : D : D

[@jakleo337]

But can it handle the shock loads of my DIY surgical tubing catapult?

[@gregoryh4601]

Very sweet work with your CAD . Have you ever been in Contact with Mike Patey and His Airplane he is building? Hope to see more of the Airplane work. Thanks

[@DarkAeroInc]

Thanks Gregory! We connected with Mike at AirVenture 2019 and got to chat about airplanes for a bit. Didn’t get to say “hi” in 2020 because of Covid. :(

[@richardvisscher2626]

if there is any flex between the rigid engine mount/nose gear and the wheel well that houses the nose gear drag link mount (i.e. nose gear drag link mount moves in relation to the nose gear) then the nose wheel may not retract fully or may retract too much, right? Maybe the nose gear drag link mount should have a couple of drag struts tying it into the engine mount?

[@DarkAeroInc]

Richard, it is possible for there to be a slight amount of relative movement between the two structures. However, they are both very rigid and tied together (since the engine mount ties into the firewall and wheelwell). The lockout mechanism is spring loaded to default the lock into lockup/lockdown. During normal operation, the limit switches will ensure the motor drives the gear all the way to it's final position. In an emergency event, the gas struts force the gear into the lockdown position. Since the gas struts are still slightly compressed even with the gear fully extended, a slight amount of relative movement between engine mount and wheelwell won't impact a full lockout. This might be a good thing to demonstrate in an upcoming video! :)

[@11Sparky111]

@@DarkAeroInc Incredible amount of engineering going into this for a such a small team.

[@blameyourself4489]

Richard. That was actually also my thought. I have often enough been cheated by simulations. Before we build something, we start with a cardboard model. Then the 3D model. And then go into production.

[@deeplato5647]

@@blameyourself4489 @Bad Obsession Motorsport--- *CAD = Cardboard Aided Design* 😻😻😻

[@shawnwedge5833]

What keeps the front tire from castering the wrong way while lifting?

[@DarkAeroInc]

Shawn, the nose wheel is castering but not "free" castering. There is an adjustable nut on the pivot axis of the fork which imparts friction into the fork pivoting action. This serves two purposes: it acts as a shimmy damper and it also prevents the wheel from flopping around backwards during retract operations. The break out force to rotate the wheel/fork assembly is around 10lbs when you push laterally on the wheel. This arrangement is similar to what is seen on the nose wheel and fork of the popular Vans RV kit aircraft or the Cirrus SR series of certified aircraft, although these airplanes are fixed gear. A good example of a retractable nose gear fork similar to ours can be seen on the Rutan style canard aircraft. The wheel and fork is pointed straight as the aircraft leaves the ground and the friction nut keeps them in position. There will be a "wedge" feature on the nose gear doors that will act as a guide to correct small angular misalignment in the wheel and fork. Thank you for watching and for the question.

[@shawnwedge5833]

@@DarkAeroInc Thanks for the reply. I have followed the videos from the beginning. Cheering for you guys!

[@humanspirit3432]

All gears and half-gears must be covered with at least some light cover box - to protect greased gears from dust, small rocks, birds etc.

[@simonbaxter8001]

How does the retract motor 'break' the drag link, to allow the retract motion, and what prevents the drag link going over centre under load and during ground and air vibration translated through the gear mechanism!

[@DarkAeroInc]

Gravity naturally kinks the drag link when the gear retracts. There is a hard stop on the upper drag link that functions as both the lock and a travel limit to prevent the drag link from going over center. We will probably show this in further detail in an upcoming video since it's a little tricky to explain in text. Keen eye and great questions Simon!

[@simonbaxter8001]

@@DarkAeroInc Not sure gravity will be enough, especially in dynamic aircraft loads and during retraction the knee of the link needs to traverse upwards (aginst gravity)! Be good to see a video showing the gear cycling. That keen eye is from 18 years of flight testing 👍

[@DarkAeroInc]

We show the gear cycling in our latest shop vlog here: kzbin.info/www/bejne/e4a6f3qLn8d0fbc

[@kenurquhart2061]

You guys are absolutely the best I think that you should be working for NASA.the standard of design and workmanship is all mindboggling.My only concern is how does this go into production from a cost point of view. ?

[@DirceuCorsetti]

I've been learning so much by watching Mathew Mcconaughey's son on this vids. Thanks

[@mathieusan]

As part of your design review, would have been nice to see what kind of analysis or test you did you give you the impression that it is "strong enough" to sustain repeated and hard landing. CAD models are always nice, until you do a first strength assessment

[@bhavarkumavat3202]

The moment I saw that Event Tree , made me remember Git ! , Onshape seems to be way ahead then Fusion because it seems it has Multiple Branches , whereas Fusion only has a single Branch 😑 , atleast I think so , I can't have 2 active versions ! Of same file.

[@boriskolnestrov9957]

Nice design full steering authority when extend, without authority retracted, one less headache 📐📏👍 do you use stranded steel ropes, rod, or morse cable for steering movement.

[@DarkAeroInc]

Steering is accomplished through differential braking. The nose wheel is castering.

[@boriskolnestrov9957]

@@DarkAeroInchello guys i couldn't see the details but I thought it had authority in nose wheel i know it's tricky and difficult design if you use authority on front wheel it will be on Dark aero ll options👍

[@bartofilms]

How about Gear Truss? rather than. Arm? Cheers.

[@R.Daneel]

I would love to see a bit more information on the backup safety features around the aircraft. You mentioned the t-handle that releases the gear so it can gravity deploy. You also mention a t-handle can releases the deploy motor to allow that. I think I see part of it. It looks like a wedge that gets freed. How is that made reliable when needed, after years of not being used? What design decisions are involved? How do you stop vibration from accidentally tripping it? That sort of thing. My interest is just generic "How It's Made" enjoyment.

[@rotaryperfection]

An alternative DC motor you guys may want to experiment with are car window regulator motors. They're mostly have a universal design and internally geared. These things have super high torque.

[@DarkAeroInc]

Haven’t looked at those. Thank you for the suggestion! And recommendations on suppliers?

[@rotaryperfection]

@@DarkAeroInc Unfortunately no! Over the years of dealing with faulty window regulators, I've come to find out that the mechanisms are what fails and not the motors themselves. Most tend to be screw to gear drives which gives them lock strength when off. I'll do some more research on the one's I've worked with.

[@rotaryperfection]

@@DarkAeroInc Here you go. Just to show you how they work. kzbin.info/www/bejne/o6bIimBqisx7g6M Edit: I forgot about windshield wipers motors. They're even stronger and multi speed. kzbin.info/www/bejne/rKnLc4Cfrt5mr5I

[@abel4776]

@@rotaryperfection Indeed, the wire comes loose not because the wire snapped, because some cheap plastic wire guide broke off, and its designed where you must purchase the whole window motor unit. The pulley mechanism does have lots of torque.

[@Scrogan]

Ah, can’t do that in OpenSCAD.

[@johncarr123]

Can you use a electric linear actuator

[@DarkAeroInc]

Hi John! We tried out an electric linear actuator as one of our design solutions for the nose gear before going to the geared actuation system. The linear actuator design was discussed a bit in this video: kzbin.info/www/bejne/mKbYm4OJZrZsn7s

[@user-tb3uq6sz5r]

這是auto cad?

[@humanspirit3432]

Onshape is very similar to GIT : D

[@nevillecreativitymentor]

Nose gear directly on the Engine mount!? Makes me sweaty palms. I am sure you guys have like engineered the heck out of the design. And it is very easy for me to sit here and just nitpick without having gone thru the whole process. I get that. Is there any video of yours where I would be able to understand the NG and EM combi being spoken about. I have a dream of owning a Private aircraft ... it was Vision Jet , Dark Aero and (one more ...i forget its name because its no more being considered)... now its Epic 1000 and Dark Aero .

[@abel4776]

The Lancair Evolution, Epic1000, and DA1 are top favs!!!

[@joseppedaia3673]

THAT would have been so helpful (please do not tell me Siemens NX has a similar feature). We (student team) are/were designing a satellite. Design just was finalised and is frozen now , but boy we had like 6 COMPLETELY different designs. We were seriously thinking about pushing complete assemblie structures with all single parts and what not to git. Just a huge chunk of data.

[@n118nw]

How do you plan on keeping the castering nose wheel from flipping 180 degrees and pointing the wrong way during retraction? The CG of the fork is above the pivot point

[@captainofiron]

wind pressure?

[@davidchow9528]

Looks like this was answered many times in other comments :)

[@Indonesia01ian]

Hi, how do we know the power needed to make our design move? is it a trial and error process?

[@DarkAeroInc]

We were able to calculate and predict the forces on the gear in the design phase. We still test everything out to ensure reality matches up with predictions though.

[@Indonesia01ian]

@@DarkAeroInc Hi thank you so much, do you have any suggestions what the keyword that I have to search if I want to predict those forces in solidworks/inventor/on shape? thanks

[@DarkAeroInc]

CAD tools allow you to model up the moving components, but the forces on them will be determined by you the engineer as design constraints. Analysis tools like FEA will allow you to determine what stresses the forces generate within the components of your design.

[@zain786ification]

How about solid works? Vs on shape

[@Nizze82]

As someone that has worked with both SW and Os, I feel that Os has a much more fluent design process. Especially its sheet metal feature is way more streamlined. SW is also inferior in its version handling and collaborative features. SW has, with its 3DExperience, tried to tackle these shortcomings, but is still way off. And remember, Jon Hirschtick and John McEleney, who created Onshape, also is the ones that created SolidWorks.

[@He-Is-One-and-Only]

Onshape never heard of it, if it's not accessible to new end user then it should stay in same state

[@tactical9897]

It’s bad when I think this is a really smooth program because my work laptop can’t even handle autoCAD this smooth. I wish I worked more in 3D motion assemblies

[@revolveperformance]

Dont really like gears in a critical application such as this. They have a low contact area,and during landing some peak forces are bound to get up and into the drive. It's neat and low mass, but it just looks like a failure mode to me. It can prevent the redundant system from working by jamming a gear. Would be nice to see the load calculation and deflection on this linkage. Im sure you have thought of this though. Really enjoy watching you guys. It brings me back to the days of FSAE :D

[@MuathYahya]

1:50 Shoulders :)

[@CesarHernandez-gr4jm]

The King of Gondor

[@Joe-zw9ep]

Would the design not be simpler and lighter if the front gear were the other way around? As to allow the air to open it? (I know nothing about anything btw)

[@DarkAeroInc]

Hi Joe, great question! The nose wheel needs to be positioned in a specific location relative to the aircraft center of gravity to achieve the proper weight distribution on the wheels with our tricycle landing gear. With the nose wheel in the correct location, retracting it forward would send it up into the engine/propeller where there isn't room to retract it. Retracting it aft allows it to be tucked away in the unused space between the pilot and copilot legs. This is a pretty standard retract arrangement in small 2-seat aircraft with tricycle landing gear.

[@Joe-zw9ep]

@@DarkAeroInc I see, makes sense. I've learnt something new :)

[@grahamkingston210]

Is that a versa planetary gearbox? and hex shaft, bringing me back to my robotics days! But for real hex shaft sucks, its quick and dirty, but the tolerances are giant, maybe not for an airplane...just my thoughts.

[@felixthefoxMEXICO]

how do you design in imperial 🤔?

[@DarkAeroInc]

The same way you design in metric 😉. Actually though, we have to work in both unit systems because the raw materials and hardware we source comes from a numbers of suppliers, both in the US and Europe.

[@felixthefoxMEXICO]

@@DarkAeroInc well then that means you can work in one of them, and procure in both. this is an old engineering problem.

[@ssscnc6663]

In12:07 what materials

[@DarkAeroInc]

For our aluminum components we use either 6061-T6 or 7075-T6 depending on the loads the component experiences.

[@ssscnc6663]

@@DarkAeroInc thank you and do you have any helicopter main rotor blades or tail rotor blades how to make videos can you post please

[@somedudethatscool6345]

I’m sure you’ve thought of this but I hope those designs are backed up in case of a data loss

[@kwr6100]

You guys need to ask @mikepatey it would be done last month

[@Jack-ne8vm]

Sexy, but a well faired fixed gear version for the cheap seats?

[@williamhuang5329]

Hanzhen harmonic drive gear , robot arm gear

[@hafizuddinmohdlowhim8426]

We on plane don’t bother about this amazing landing gear at all. What we care is to land safely.

[@humanspirit3432]

I suppose you can get rid of few useless idler gears in this mechanism.

[@DarkAeroInc]

It wasn't discussed in the video, but the two idler gears do have a function. They sit on a rotating carriage that can pivot to disengage the idlers from the motor and trunnion. This functionality is necessary to allow the gear to extend in the event of a motor failure or loss of electrical power. We will demonstrate this mechanism in an upcoming video.

[@humanspirit3432]

@@DarkAeroInc This is strange. Usually some kind of a dog-clutch is used for such purposes.

[@javieramadorecaldecenturio3625]

Is onshape better tan solidworks?

[@svenolovnystrom2351]

Onshape is awesome , but inches belongs to prehistory.

[@jamescrud]

I'm surprised you're using cloud based CAD software for proprietary designs.

[@Scott-ol9zs]

Over thinking , Git-R-Done

[@muhammettas4855]

Hello desing is looking so weak pls add a bit rib.

[@spqba747]

So for non paying viewers you will only publish sponsored content?

[@DarkAeroInc]

Shop vlog coming out tomorrow. 🤙🏼

[@theillitistpro]

That looks sketch... Anyone that models or designs in 3D gets this pun. :D

[@dannymiller1594]

WAY too complicated with WAY too many failure points.

[@dvsmotions]

Wasn't excited about a 12 min ad for Onshape.

[@AlJay0032]

Have you used both Onshape and Fusion360? I am curious about a critical comparison. What is your opinion on the two and perhaps even other pricier professional systems if you can say something about them.

[@16siemon]

I would have thougt they were using solidworks, the Onshape ad suprised me aswell

[@minibigs5259]

Cool story bro.

[@AlJay0032]

@@16siemon This is not the first video where they are talking about why they are using Onshape.

[@TehR3d]

Onshape is like the google sheets to microsoft excel, works seamlessly, feels great to use and is much better for collaboration but lacks in the variety of functions and options available in more established cad softwares such as solidworks

[@jotham123]

I'm here to learn about your project, not to listen to a Onshape advertisement. Cloud based CAD SMH.

[@shreyesgedam2751]

fusion is better , Period .

[@Mariano.Bernacki]

Not interested in a 12 minute ad for Onshape.