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TOPIC: Launch assist V02

Launch assist V02 6 months 2 weeks ago #987

Hi for all,
I give a try and share some pics and info about my project. Based on 12090 outrunner, Dlux esc, 18650 battery pack (14s10p) and reduction drive. Goal is a launch assit unit to catch thermals and ridge lift. Dudek Komfort harness, low hook in point to get weigth shift. The frame is made from carbon fiber composite. Supporting arms and outer ring now aluminium and later change it to carbon too. Arms can fit with push button springs, very simple and fast locking method.
Now the project is slowed down because I need some money for the battery pack.
Meanwhile I'm making small parts and details and hope time will come soon. :-)
If anyone is interested to the carbon frame I got the mold and can make more backplates. You can make the supporting arms and outer ring for yourself, that is not a big deal but the backplate need more time I know.
Regards, Roland
The following user(s) said Thank You: Gamba, rodrigomedeirosbrazil

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Launch assist V02 6 months 2 weeks ago #988

Great!
Where you bought push button springs? Or are you made?

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Rodrigo Medeiros from Brazil

Launch assist V02 6 months 2 weeks ago #989

Hi,
bought on ebay.
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Launch assist V02 6 months 2 weeks ago #991

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Wow - the carbon fibre is very cool!

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Sorry not PG, but electrons are electrons right!

Launch assist V02 6 months 2 weeks ago #992

Agree, carbon is cool stuff :-)

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Launch assist V02 6 months 6 days ago #1016

Very nice looking set up
Cheers

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Launch assist V02 6 months 10 hours ago #1035

Hi Roland!
What is motor KV?
What is your reduction relation?

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Rodrigo Medeiros from Brazil

Launch assist V02 5 months 4 weeks ago #1038

Hi Rodrigo,
motor is 130kv, reduction 2,25. But not tested yet, got here some other pulleys so I can change the reduction ratio.
The following user(s) said Thank You: Wannabeaflyer, rodrigomedeirosbrazil

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Launch assist V02 4 months 4 weeks ago #1059

New cage on the way. between 2,5-3 kg so it is a bit heavy :-) Can save some weigth with carbon tubes but first it is made from aluminium.
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Last Edit: by RolandFalusi.

Launch assist V02 2 months 1 week ago #1157

Today I made a small insert to hold my temp sensor. I know this is not the best way to keep eye on the motor temp but is is good for reference.
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The following user(s) said Thank You: Gamba, Wannabeaflyer, rodrigomedeirosbrazil

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Last Edit: by RolandFalusi.

Launch assist V02 1 month 2 weeks ago #1167

Hi for all! Well, I made a lot of launch assist versions in my head past weeks and months and do some bench test, have flown with my petroll paramotor and thinked about a lot meanwhile what would be the perfect solution for me. My goal is to fly ridge lift and thermals high as possible, long as possible and short motor time (if :-) ) possible. I really enjoy flight when I catch the thermal and follow it and I don't know where I will land, then I just pack my rig and my wife pick me up on the field if there is a road, or I use a bus to get home, or just simple walk a lot abadoned terrains. For this style of flying the best launch assist is:
- small (the best if it pack in my pg backpack)
- ligth weigth
- easy to start
- low drag
Regard of this, the best solution is a small propeller unit. No matter the higher noise because it runs really short time. And not a big problem the higher amp draw because of the same reason : you need it for short time.
So I decided to go on this way and started my test program to find the best combo for my drive train (130 kv motor, Dlux250esc, battery? not decided yet). I got a lot of help and many advice from Reidar how is an expert on this style of e-helps.
Afternoon I will make some hang test and send some pictures and conceive if anyone is interested.
Safe landings,
Roland
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Launch assist V02 1 month 2 weeks ago #1171

Hi Roland

I am very keen to watch your progress as you have arrived at a similar conclusion to me with the direct drive, smaller prop. I have not yet been given spending permission from my wife to buy the required batteries but hopefully i will buy them as an early christmas present to myself soon. I recently discovered the motor i received is 50kV not 80kV. In my case i am actually quite happy and i now plan on building a 22s10p 18650 pack. This will make it a higher voltage, lower current system then i originally planned which i think should be more reliable and efficient .

I think you may struggle getting a decent thrust combination right with such a high kV value , battery voltage will need to be quite low and thus current may be higher then your 250A ESC is comfortable with. Looking forward to seeing the results of your future tests! Good luck!

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