Hangar 9 ASW-20

[ARUP]

Stephane, do you have source and part numbers for the wing servo lead socket and plug?

[BobR]

Wow that is so COOOOOL, I noticed you did not use flaps for landing. Do you have any videos with them in use? I ask as my home field I may not be able to land it. I know for sure I will not maiden it there. I want to order her so bad. Must wait another 2 weeks (house to close in Atlanta Then Game On!

[French1]

Bob,

here is how it look when done,

enjoy Cumberland 2015

[BobR]

Stephane,

LOL I have done much work and analysis over Motors, ESC, and Prop combinations for the ASW 20 to include offset. I have nearly come to the conclusion that Eflight and Hanger 9 engineers really know what they are doing. The eclac software has been priceless to test bench (software) 100's of combinations. The results of which can be narrowed down to a few simple conclusions. 1. Nothing is free. 2. There is a cost financial and engineering for performance. What Hanger 9 has done with the standard set up appear to me to be a combination of performance, price, and solid configuration. HAVING SAID ALL THAT, I think there is a justifiable case for upgrading the prop to a 17x10 which produces .94 to 1 thrust to weight ratio when the proposed 16x10 produces .85 1 thrust to weight ratio. Perhaps not a big deal but a cheap hop up with no other degradation that I can see. I think it best to harden ESC however to 120A.

The work continues......

​Bob

[BobR]

Your set up would not be to far from what I would do as I am not sure of the effectiveness of spoilers. Nice to here they work well. My Plan is to purchase the DX9, when I do I will ask for the SPM.

[ARUP]

This is a great thread! In lieu of rubber bands or coiled springs put a torsion spring to keep retract doors closed. Mine are of 1/32" wire and about 16cm long and have 'L' bends at their ends so that one end can be epoxied to door near rear hinge and other into the fuse. You will need to drill a hole in bulkhead for springs to pass. Mine are bent to 'pre-load' the spring and help keep doors shut while in flight (I hope!). The spring passes under the 'lip' that the door recesses into. That way the wheel/ retract won't catch them as it might a rubber band or coiled spring. I epoxied the fuselage end first so that any tension in spring is accounted... torsion taking care of the rest.

[French1]

Bob

My pleasure to help and share, this is what I like the most in that hobby!

If you are using a DX9 or DX18 I can send you my ASW-20 program,

For the moment I have not used the crow as the spoilers are very effective! I usually use the flap on landing approach in order to slow down the speed and adjust glide path with spoilers.

I set up a mode switch where I have a thermal / cruise / speed setting

thermal has a lower rate for flap and ailerons and a mix flaps -> ailerons

cruise has higher rates and no mix

speed high high rate and mix aileron -> flaps to du some aerobatics

No fancy other mix

Stéphane

[BobR]

Stefhane,

I would like to thank you for your advice and assistance. I sincerely appreciate it as you have much wisdom to share. Based on your input, I have already began to modify my original planes and will keep you up to date as I make progress.
As for the radio set up (I use Spektrum) – I used to setting up a full house with butterfly crow, reflex, camber, full flying trailing edge. Are you doing the same or are you keeping it purely scale in its function?

Bob

[French1]

Bob,

no weight added, wilth 8S should be easy to balance without weight. The only issue is for the cockpit as you my need to put batteries further back the seat pan may be cut significantly

Weight Wise, I always weight my planes so wings weight 1870g each, same weight for each!

For the DB9 plugs, the male are fixed in the wings by slotting the plywood, on the fuse side, the plus are not mounted on the fuse but are just shovelled in the wings plugs

here is how it works on my SZD

IMG_0425 by steffruelle, sur Flickr

Stéphane

[BobR]

Stephane,

Question 1: When you were performing weight and balance in accordance with CG with the standard Hanger 9 electrical configuration, did you have to add weight? If so how much? Where - front or back of sailplane? Also I was interested to know if you also weight your wings - was there any deviation in weight?

I am finding the requested information priceless as I can hop up the airframe but I do not want to do it at the price of having to balance the air frame with lead I don’t want dead weight. Functional weight is Great!

Question 2: I see that you added 9 pin connectors in wing. Great Idea! How did you pull that off. Honestly I have no idea how you would do that so it centered each and every time. My question is how did you mount them and then center them.

I am dying to here of your response. Thank you as always

Bob

[French1]

Bob,

I would increase prop diameter, try to simulate this with ecalc to se the amps on a 17x10 or 19x9

I have probably on my setting run it up to 45 seconds, but I have no temperature measurement to say if it then get too hot.

[BobR]

Stephane,

I see, all very interesting, with the set up that I am proposing, what would you personally do to improve performance? increase size of prop? Do you ever run more than 30 seconds?

​Bob

[French1]

Bob the number that I state are my readings on my setup during flight. I extracted data from my ICE 2 80HV

I run motor for runs of 30s and found no problem with it

You should be able to be more pushy with the hacker, usually they have a decent margin with their max settings, is it Worth is, just you can answer to this, depend if you like to experiment then do it or to fly then go with what works

Stéphane

[BobR]

Stephane,

Very good point I want to run the standard setup which I believe you are running versus what I provided you (my proposed build) earlier. Here is what I found. eCalc estimated a + or - 10% so who really knows.

Your set up - power 60b (470), 80 amp, 6 cell 30c, please notice the warning on over amperage, over temperature, and over limit of motor. Yes you seem to be right as it indicates 1764 w at .80 to 1 thrust. very good. I ask you if that is what you are really seeing? It indicates that you can only run at full power for 15S max. Is that true? What is the maximum watts you are really pulling. hum this is interesting. As I said earlier we are + or - 10% very interesting.

My proposed set up hacker A5016L on an 8 cell 70c, and yet my thrust to weight is 81%. you are correct.

So the real question is can, should I stretch the motor some more? Is it worth the extra expense to put together my set up? It is all very interesting to me. I look forward to your advise?

​Bob

[GliderGuyz]

How did you change the crimping procedure?