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155mm EDF Testing Unit - Small Servo
(under construction. pictures of a unit with big servos. note the blocking effect... fixed... but not in this one. crash more.. then it will be fixed. )
1. Print
2. Remove Support Material
3. Using silicone glue in EDF.
4. Screw In Servos for Arms.
5. Cut length of carbon fiber or wooden rod for the riser attachments.
6. If using a switch (I keep frying them... so be careful) Install switch.
7. Using double sided tape. Mount Receiver, ESC.
8. (Optional) If adding speed system. Build Turning Blocks.
9. Attach two lines that are too long to the servo arms on the speed system.
10. Attach wing to base.
11. Connect electronics to transmitter. Power on. Get zero position and find out if the EDF is wired the right direction, if not. swap two wires to the ESC.
12. Attach Control Arms to Servos in the "up" Neutral position.
13. Hang unit upside down. Adjust brake line length.
14. Run speed system lines to cascade attachment on the A risers. (most front) Tighten to where at neutral speed system, there is almost no slack.
15. Clean up wires and tape in battery pack.
16. Go fly.
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2Tuning the brakes
So.. You have it working. it flies. mostly.
Depending on battery and servos. You will need to adjust some things to get it flying well.
When you fully deflect the right or left. the wing should just break into spin.
When you fully bring both arms down it should just break away into full stall. Establish a stable back fly.
With hands full up. There should be no deflection of the trailing edge.
I need to get someone to help film this.
There is an interesting lesson from another test.. What happens if you lose power.. Do you want to fly straight? Maybe....
I'm not opposed to slow turns into the ground.. I did that by accident here. A switch that I was using to not have to plug batteries in each time, fried. Again... and I lost all power.. Luckily the power off configuration... had a bit of turn in how I adjusted the brakes.. just enough to make it not land in a tree!!!!!!! yipeeee!
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3V4 Unit Build
Print out the files Base Unit V4 & BirdFishArmBig
The V4 version is not the one pictured, as I had made a mistake with the reinforcements between the outer shell and the core EDF unit.
This version uses a bigger EDF than the first unit.
The broken version ready for salvage is a good exploded view of the components. I might have gone overboard with the ESC. Im testing things to find out.
here is the Unit all buttoned up before I broke it.. Ready to fly. This ended up working great for the smaller wing, but... it really wasnt enough loading for the larger two wings.. I had to tape containers of steel bbs to it for the larger wing to fly properly.Here is the next version with additional reinforcement. Still flying, still testing. Perfect for the smaller wing.
Do not use a switch. It will FRY!!!!!! Trust me.. You can watch the video in the last step to see that in action.
These have speed systems with servos to pull it down, I ended up detaching it, because It wasnt working for me the way I wanted. For this wing.. I dont need speed system.
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