Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC: PARAPUSH project

PARAPUSH project 3 months 1 week ago #380

Hi Guys
The pile of parts is growing to a point where I can make a start. I'm trying to build a twin contra rotation prop lightweight launch assist. Some kind of blend of the SunnyMotor and Ali's early experiments. Here's a few pictures of this weekends efforts...
The following user(s) said Thank You: Gamba, Wannabeaflyer, Simon

Please Log in or Create an account to join the conversation.

Last Edit: by Paul in Oz.

My project... 3 months 1 week ago #385

Nice one Paul. The Fun Begins and it will be a great journey :-) Def will be following your work

Please Log in or Create an account to join the conversation.

My project... 3 months 1 week ago #388

I agree with Calvin. Another exciting project that will be fun to follow.

Please Log in or Create an account to join the conversation.

CEO - G-Air
www.g-air.eu/

My project... 3 months 1 week ago #398

So far....
Attachments:

Please Log in or Create an account to join the conversation.

My project... 2 months 3 weeks ago #430

A few more progress pictures.
The following user(s) said Thank You: Wannabeaflyer, Simon

Please Log in or Create an account to join the conversation.

My project... 2 months 3 weeks ago #433

Just wanted to say Very Nice work Paul :-) very informative

Please Log in or Create an account to join the conversation.

My project... 2 months 1 week ago #483

No post here for a while because it's not been going too well :-(

On another thread Wannabeaflyer was having troubles too and made the remark:

"Expensive brick that ticks like a time bomb"

LOL, that's exactly where I was but I didn't put it so eloquently :-)

Turned out that on my setup I'd fried the BEC. There's no BEC on my ESC's so I put a UBEC in (which also made it easy to put my kill switch in here too). But I forgot to check its rating before connecting up a 12s pack. Turns out it has a maximum 20V input so I fried it with 47V. With no power the modded servo box won't produce any signal resulting in the ESC's woebegone "I can't hear any signal" beeping.

I have a new SBEC so today has beena day of soldering and trialling.

And.... I have some success! At least I got one motor turning on a servo tester. But it didn't work with the modified throttle (made as described elwhere in the forum). So I tried soldering the slide potentiometer in the Skalectrix handset directly (via a three core curly cord) into the contacts where the rotary potentiometer was mounted on the servo tester. This works a treat, though I'm going to have to resolver it as the connections are nowhere near strong enough and I want a cable clamp in there too.

The other thing thing I've done is put a kill switch in the power supply to the UBEC. It's fitted with a missile switch cover so it's two actions to turn on, one easy action to turn off. I've mounted it low on the frame where even if I drop the throttle I can still hit the kill easily. See photos.

And lastly. I've come up with a name for my project. I'm just trying to build a simple thing to push my paraglider up to a level where I can fly as if I wasn't wearing it....

Gentlemen..... I bring you PARAPUSH

;-)
Attachments:

Please Log in or Create an account to join the conversation.

My project... 2 months 1 week ago #484

Hi Paul Thanks for documenting this , answered my upcoming question nicely Cheers sir , Small Steady Steps and Parapush will be making a name for itself ...Great stuff that man Cheers ( you realise you now have me doing more business with Ebay LOL ) ..

Noticed that a lot of projects don't have like a main breaker switch or fuse in the Battery side of the circuit , is this to do with the Keep it simple method ? I take it that these systems are live once the battery is connected but only the Inhibitor switch in the Ubec stops the ESC working ?

Please Log in or Create an account to join the conversation.

Last Edit: by Wannabeaflyer.

PARAPUSH project 1 month 3 weeks ago #516

First fire up.... and I manage to drop the waist strap into the lower prop! Destroyed the buckle the prop is unharmed. Couldn't go to full throttle because I didn't trust myself to hold it against the thrust 8-)

Watch this


Paul
Attachments:
The following user(s) said Thank You: Simon

Please Log in or Create an account to join the conversation.

Last Edit: by Paul in Oz.

PARAPUSH project 1 month 3 weeks ago #517

Great Progress Paul :-) its all small steps but the main thing is your getting there, Nicely done . I'm stalled at the moment progress wise ( ESC issues but still battling on till I have to commit to buying another ESC ) keep at it mate ... and thanks for posting great pictures .:-)

Please Log in or Create an account to join the conversation.

PARAPUSH project 1 month 2 weeks ago #530

Well after chopping up the waist strap I've spent a few days cable tying netting to the frame. Sloppy job (the entire cage) but it'll give me enough safety to try it with a wing some time over the weekend probably.

Quick clip of the second fire up....

The following user(s) said Thank You: Wannabeaflyer, Simon

Please Log in or Create an account to join the conversation.

PARAPUSH project 3 weeks 1 day ago #547

BUGGER!

First fire up with a wing..... and I screw it up totally :-(

Turned before I'd got the wing above my head. One riser deformed the cage enough for it to impact with the upper prop.... BANG! Game over :-(

Lessons learnt:
1, don't rush your take off. Get the wing stable before you hit the power.
2, I need some sort of strap to hold the throttle in the pilots palm.
3, improve the cage

I'll let you guys know as I go along

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
  • 2