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GWS A4 Skyhawk

Old 02-29-2008, 11:51 PM
  #76  
FresnoJay
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I hadn't read the post but have now and think I know what you are asking now.

The answer is they are right. You do not want to limit throttle 25A with a motor that pulls 45A using the EPA on your TX. It does, can, and will damage your ESC if you can even get it to arm. With my Turnigy ESC's if the EPA is messed with at all it wont even arm unless its set back to 0 on the low end and 100 on the high end.

Now as for what ParkJetsFlier said about watching the throttle. If the airflow around the ESC is sufficient he could presumably get away with going with what he has stated. How long till it would give up the ghost? Thats a different story and mainly depends on the contruction, airflow, and tolerance to abuse. The Castle rep said in thier statement the pixie 10 would handle the scenario stated but not for long. Same would be for the setup ParkJetsFlyer has purposed. It would do it but for how long till it gives out.

Did I get it right this time?

Jason
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Old 03-01-2008, 01:43 AM
  #77  
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Ok well the weather is looking good for some flights on the A-4 tomorrow in the morning. Hope to get some video to post as well.

Jason
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Old 03-01-2008, 01:59 AM
  #78  
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Good luck Jason
She is a really sweet flyer and handles very well...nothing but cake all around
Landings are non-eventful at all but I always land at about 1/4 throttle but it was easy
I will post some more pics tonight after I finish my wing spar I am working on

Back to work!
ttyl
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Old 03-01-2008, 02:03 AM
  #79  
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usmc, that is how I landed her the one time I flew her and greased the landing. But man she ate alot of runway on her roll out lol.

Jason
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Old 03-01-2008, 02:42 AM
  #80  
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Jason
That is what silicone fuel tubing on the axles are for
acts as a on board "brake" so she doesn't roll forever
Just a small piece sandwiched between the wheel retainer and the wheel is all you need
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Old 03-01-2008, 02:49 AM
  #81  
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Interesting idea. Never thought of tring something like that. Was actually kinda glad to get my wheels spinning freely and not wobbling or binding when I put her together. Might give it a try. Did look kinda cool with the long roll out. Almost like watching a real one landing and going to the end of the runway. The place where I fly couldn't be better suited for R/C planes. Considering its a college parking lot its almost like the guy laying it out planned to go flying there on the weekends himself. Even the campus cops come over to watch us fly and check out our planes. Will at least get some pics of the field if I can't get video tomorrow to show what I mean.

Jason
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Old 03-01-2008, 05:09 PM
  #82  
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Well the good ole Fresno weather has killed my flying yet again. Beautiful all week and crap on my 1 day to fly. Took a short video to show what its like outside.

Well I cant get the video to load from my youtube page. Keeps saying I dont have flash installed which I have both shockwave and adobe flash installed and niether are working.

Jason

[media]http://www.youtube.com/watch?v=iEoEoNXBMxI[/media]

Last edited by FresnoJay; 03-03-2008 at 05:54 PM.
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Old 03-01-2008, 06:08 PM
  #83  
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Originally Posted by FresnoJay View Post
Well the good ole Fresno weather has killed my flying yet again. Beautiful all week and crap on my 1 day to fly. Took a short video to show what its like outside.

Well I cant get the video to load from my youtube page. Keeps saying I dont have flash installed which I have both shockwave and adobe flash installed and niether are working.

Jason
What browser are you using?
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Old 03-01-2008, 07:26 PM
  #84  
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I am using Internet explorer. I was able to post it on RCG but not from youtube. I had to post just the file in thier video forums section then copy the link into my A-4 thread. Not at all how I planned to do my video's. I started my youtube account to use as my posting site so users dont have to download then view, they can just view.

Jason

Nevermind I figured it out now. lol thanks for the help
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Old 03-02-2008, 02:49 AM
  #85  
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Jason you have probably already seen these but here they are for the members of this forum
Pics of almost completed A-4 and a pic of my old A-4 that suffered an in flight fire
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Old 03-02-2008, 03:03 AM
  #86  
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I have but cant see them from my smart phone anyhow. all I can say from what I saw earleir was you are lucky you got the crispy one down.

Jason
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Old 03-03-2008, 03:58 PM
  #87  
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Originally Posted by FresnoJay View Post
Well the good ole Fresno weather has killed my flying yet again. Beautiful all week and crap on my 1 day to fly. Took a short video to show what its like outside.

Well I cant get the video to load from my youtube page. Keeps saying I dont have flash installed which I have both shockwave and adobe flash installed and niether are working.

Jason
Just use the "media" tags around the link, Jason. Not "youtube" and "media." Then it will come out like this:

[media]http://www.youtube.com/watch?v=iEoEoNXBMxI[/media]
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Old 03-03-2008, 05:55 PM
  #88  
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Thanks Perladdict. RCG posting a bit different but now I think I got them both down thanks to help.


Jason
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Old 03-03-2008, 09:34 PM
  #89  
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USMC, sorry if this is covered someplace else, I haven't seen it yet. Can you give me some details of your retracts and servo's ? A servo pic would be nice, too.
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Old 03-03-2008, 10:06 PM
  #90  
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Parkjetsflyer
yeah give me a bit and I will post some detailed pics of the painted plane later this afternoon/evening
I just finished spraying it and letting the paint get a nice hard cure now
At the moment I am cleaning up the garage that gets trashed everytime I build a plane
She is looking sweet though
I used those robart micro retracts and the GWS retract with HS-65 MG servos
Pics later
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Old 03-04-2008, 04:54 AM
  #91  
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Parkjetsflyer
Here is the detailed pics of the retract servo in place
You can see the plywood box that the servo sits in and is bolted down to
Also here is some pics of the painted plane
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Old 03-04-2008, 09:31 AM
  #92  
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Looks good usmc. When does she go up?

Jason
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Old 03-04-2008, 07:46 PM
  #93  
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Jason
Hopefully today
I finished the thrust tube (easiest one I have ever made)
and I worked out the issues on the nose retract

got some numbers also
50 amps
820 to 830 watts

I need a scale so I can weigh my planes

feels pretty good on a straight up pull

I made my thrust tube at 55 MM
sound about right?

Hopefully today I won't need the fire extuingisher
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Old 03-04-2008, 11:52 PM
  #94  
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USMC, 55mm sounds to be the sweet spot for pretty much any 70mm fan. Let hope you dont bud. Keep her cool.

Jason
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Old 03-05-2008, 04:16 AM
  #95  
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Jason you might have read this already but I posted it here also for others to see
Well everyone...... she flew!
She flew amazingly well and stable as a rock
Other pilots at the field said she was moving anywhere from 85 to 90 Mph
Was a tad tailheavy as she was a little twitchy on the controls...not bad at all
Vert performance is where she really shines....from 10 foot elevation to over 300 foot without breaking a sweat
Takeoff was absolutely no issue as she pretty much rotated on her own after about 100 feet and took to the sky (I was holding down elevator to build speed)
Retracts worked flawlessly except on landing......when I touched the mains down I was angled slightly towards the side of the runway
Without the nose down and not having a rudder I was not able to correct the angle ...so she rolled into the grass but was going fairly slow
Bent the front retract leg slightly rearward
I will be picking up the robart steerable nose retract tomorrow
All in all a wonderful flight and that fan sure sounds sweet at WOT
Flew for a total of three minutes with zero trim needed and still have enough juice left for another 2 minutes at least
Definitely a keeper and really glad I got another after the first mishap
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Old 03-05-2008, 04:34 AM
  #96  
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Congratulations USMC!!
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Old 03-05-2008, 04:45 AM
  #97  
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Parkjetsflyer
Thanks Man!
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Old 03-05-2008, 06:19 AM
  #98  
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Here is a pic of my GWS A4..I did mine in grey..I love your retracts,they look great..The GWS A-4 is awsome...
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Old 03-05-2008, 07:18 AM
  #99  
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3d, She looks good. Nice work, subtle but sharp.

Jason
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Old 03-05-2008, 07:19 AM
  #100  
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USMC, Congrats and hey man where's the vid? You do know I can doppler now right?

Jason
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