Dear reader,

We are now live at www.skycat.pro. The development project continues, and updates are added to this blog in random intervals.

We have parachutes launchers available in many weight ranges; optimal 1 - 6 kg and these could be extended with higher impact level up to 11 kg. For larger up to 23 kg multicopters we have XL - series with pilot chute principle.

For those who wants to digest all information available of products, we have left this blog as it is. This blog follows closely main steps we have gone through while developing parachute launcher. Blog might feel like Do It Yourself kind and to be honest, in the beginning it was.

After hundreds of hours thinking, designing, prototyping and testing our patent pending launcher turned to be the most reliable parachute launcher for professional use. We have searched all possible boundaries of technology and from this blog you'll find results of these successful tests but also not so successful tests.

You never know where The final limit of technology is without experiencing it. That's the reason why we have done tests for scenarios which might not be even realistic on flight.

For production versions of Skycat we could proudly to say that we have experienced zero mishaps, never failed a single eject and parachute has deployed every time. This includes rescue scenarios with every imaginable scenario copter could face in air. Check this out as one sample of our test sessions! 

Skycat parachute launcher has been tested beyond all imaginable abuses copter possibly could experience in flight. We have sink it to water, it has been heated hours to 90°C and exposed to extensive moisture, we have frosted, defrosted and frosted it again, it has been in mud and snow and still it has worked. Same overshooting tests we have done also for electronics. This is not promise you can use our products outside of submarine but we have tested it so :)

This blog will still be updated as well our Facebook pages www.facebook.com/skycat.pro and Twitter at https://twitter.com/skycatpro

Fly safe - Let's keep our copters flying!

Henri

Skycat.pro

 

DJI Inspire 1 / Skycat X55-CF parachute integration by www.remotevision.ch:

Other documentary videos:

Skycat Twin test session

OPENTX for parachute eject and 6POS switch

DUAL spring loaded switches - single RC channel for parachute eject...

Brake enabled SimonK firmware

Ground eject demonstration in slow motion 

Water test

Aerial test No 2 for Opale Paramodels 2.5m^2 parachute 

Aerial test No 1 Opale Paramodels 1.8m^2 parachute 

A moment of deploy

Tower test 3

Tower test 2

 

Manufacturers contributed to this project:

- http://www.opale-paramodels.com/

http://www.fruitychutes.com

- www.vectorheli.com

- www.3drobotics.com

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Henri,

     I believe the APM2.x's MPU6k accels are configured to measure up to 8G

Randy,

It sounds quite low for this use. We'll see.

Shock cord and quick lock strength tests we carried up to breaking point. Theoretical maximum forces are huge if copter is allowed to speed up to terminal speed. This strength test proofed that copter will be ripped in pieces before quick locks and shock cord breaks.

Value at scale is kilograms. Weight of quick lock is few grams.

Today we did some few free fall impact tests using APM IMU. Last test fall was about 20 meters from altitude 35m to 12m. Log screenshots are attached and log file also.

Copter was almost upside down when I hit eject. But all good in the end and no new scratches were suffered. Copter landed perfectly level.

And here is log file.

Attachments:

Short video is uploaded to here. If you listen carefully, you'll hear first click which is throttle to zero and another click which is eject. Second click is pretty much same time than parachute is out. Activation time measured on table was about 0.08 seconds.

This time we left copter home and took fixed wing to test field.

I found challenge at Psaru (people search and rescue unit) where they would like to use fixed wings along with copters for searching missing people. Fixed wing would be optimal for search missions because of its flight time but finding proper landing site narrows possibilities of using fixed wings. My idea was to dive with full flaps where ever open spot is founded and land with a parachute.

We used smaller Skycat parachute launcher from development table and hooked it to Bixler. Idea was to use longer shock cord (+1m) and shoot parachute beyond propel and tail.

As images shows, this idea might work. Deployment was straightforward without any tangling and landing was extremely smooth. With experiences gained today I could without hesitation hook this up to 2-3kg fixed wing and land with a parachute every time.

Tests continues.

Verrrry cool... great work!

Today we made new spot landing flight test with Bixler and a parachute. This time it was spinning dive without flaps. With some practice landing might be possible to do at quite small spot. Airplane didn't have a scratch.

Video is uploaded to dropbox (here) and later to Youtube when we get more material with different landing methods.

Something not so usual this time.

We made two kind of shots; dual parachute with two 4m2 parachutes and also dropped my aerial photography copter; Vector Vision 7.

It is a copter standing on a pillar on header of this thread. Copter was fully equipped on test: T-Motor ESC:s and motors, Zero UAV autopilot (still using Arducopter with another copters), gimbal, camera and all other gears needed.

All went good except test copter power run out for some reason at altitude 8-10 meters. Last value on telemetry was 8 meters (26ft) and copter didn't climb visually much after that, in fact it started to fall quite soon after altitude checking. This was lowest altitude we have ever attempted with such large parachute but after half second consideration I pulled eject. Both chutes were fully opened perhaps 3-4 meters from ground. We have shaky video from my helmet camera from this episode but not uploaded today, it's late here.

 

That's great that the chute deployed that quickly.

This is Perfect, That is 10meter is the Bottom line?
Thank you and keep up the great work.
Helmut

Thanks Helmut,

It is bottom line what we have tried. To be honest it wasn't planned to be that low :) Power run out from some reason.

BTW, video has conversion typo. I'll replace it.

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