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GWS A4 Skyhawk

Old 10-02-2008, 05:16 PM
  #176  
Crash Test Dummy
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Nice pix Jason!! I posted this on RCG also but......Are you guys gluing the main wing on or are you just using the cf rods and the stock wing locking thingy?

CTD
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Old 10-02-2008, 08:53 PM
  #177  
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Ok I think I"m done with paint. Here are some final pix. Next will be the Envirotex. I'll need to wait until all the paint is 100% cure before applying the Envirotex. I may be able to start that this evening.

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Old 10-03-2008, 03:14 AM
  #178  
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Looks good. I wish they had made them a single seater, which I like more than the tandem.
The stock latch setup actually seems decent, for the simple reason that there are so many of them for support, that it actually ends up strong. I've put them through a bit of abuse on my GWS15 and they haven't budged.

I like the camo on these jets. I still need to fly my retract version. Poor excuse, but the small road with many signs at the local park is tedious to use for a runway. I've seen them handlauch well, but mine is a bit heavier than some, with a JS1400, 4s, and retracts.
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Old 10-03-2008, 05:39 AM
  #179  
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Thanks Bill,

That is a very nice looking A-4. I don't have a good place to fly off of asphalt either so mine will be hand launched. I'm about to get a weight on her before I apply the Envoritex coating. I cant wait to see how much weight the coating adds. I'll report back with the info later tomorrow. If I can get the coating applied tonight or tomorrow. The Envirotex takes a Looooooong time to cure out, touch it too soon and you will get a nasty finger print on the finish.

I just finished putting on the water slide decals on her. I found them to be kind of crapy. However now she looks like she is ready to party with all her makeup and jewelry on!!! Now for the Lip Glosss!!

Did most of you use these supplied stickers? What did you think fo there quality? The adheasive was good on some of the decals and terrible on some of the others. I'm glad I put them on before the final Envriotex coating, it should help seal them in position. I think I"ll glue the wing on, as Pat said eariler the WS isn't an issue. It will even fit in the smallish trunk of my Honda Prelude.

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Old 10-03-2008, 05:58 AM
  #180  
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Here are the pix with the stickers applied.

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Old 10-03-2008, 09:47 AM
  #181  
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CTD, I hadn't replied on the wing issue but will answer here as its less crowded and wont get lost. I used the stock removable wing setup for about 4-6 flights. But as time wore on the wings started getting sloppy and with the power system upgrade to the 2W-20/6904 I started using 2 packs in parallel. I didn't want to risk a rough landing and pulling the wings out. So using the stock pins and clips for alignment aides glued the wing into place. I have seen no problems with wing flew or cracking. Mine flies close to 100mph and I see no need for any extra CF reinforcement. Just what is there stock and some epoxy and good to go.

Oh and after I glued my wings on I took some hobby lite filler and you can no longer see the stock clips that held the wing on.

Jason
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Old 10-04-2008, 12:14 AM
  #182  
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Yea, I"m gonna glue the wings on.

CTD
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Old 10-04-2008, 07:02 AM
  #183  
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Originally Posted by Crash Test Dummy View Post
Thanks Bill,

That is a very nice looking A-4. I don't have a good place to fly off of asphalt either so mine will be hand launched. I'm about to get a weight on her before I apply the Envoritex coating. I cant wait to see how much weight the coating adds. I'll report back with the info later tomorrow. If I can get the coating applied tonight or tomorrow. The Envirotex takes a Looooooong time to cure out, touch it too soon and you will get a nasty finger print on the finish.

I just finished putting on the water slide decals on her. I found them to be kind of crapy. However now she looks like she is ready to party with all her makeup and jewelry on!!! Now for the Lip Glosss!!

Did most of you use these supplied stickers? What did you think fo there quality? The adheasive was good on some of the decals and terrible on some of the others. I'm glad I put them on before the final Envriotex coating, it should help seal them in position. I think I"ll glue the wing on, as Pat said eariler the WS isn't an issue. It will even fit in the smallish trunk of my Honda Prelude.

CTD
The waterslides GWS have been supplying are terrible. They may as well just go back to stickers, if they are going to be like this. You're lucky if you don't ruin them trying to put them on.
I take the blank areas of the waterslide sheets, cut them out, wet them, and wipe the wet glue on the model, before applying the GWS waterslide decals. Seems to help.

The wing clips do have one problem in that GWS does not tell you to mount them protruding several thousandths of an inch from the mating surfaces. It's almost impossible to get them right, and are either too loose, or impossible to latch. It probably does make sense to just go ahead and glue them, as I would never unclip my wings now anyways. I'd never get the clips fastened again.

I pasted a sheet of Econokote across the wing bottom center area and the fuse. Covers the clips/seams, and also stops any chance of the wings pulling out.
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Old 10-04-2008, 06:03 PM
  #184  
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Bill, That is one quick easy way to do it. Wish I had thought of it myself. Would have saved a few days of work.

Jason
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Old 10-04-2008, 06:21 PM
  #185  
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Subscribed -- eager to see how the maiden goes!
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Old 10-05-2008, 04:08 AM
  #186  
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Bill,

Thanks for the tip, thats a good idea however I already applied the decals. I picked up some Micro Set soulition from the LHS today and it helped quite a bit. There looking much better now. I also just finished applying the Envirotex coating on the entire airframe. It looks soooooo nice with the Envirotex. I'll shoot more pix and post them.

Someone here asked me to post a before and after weight on the A-4. I almost forgot!!! Oops. The A-4 with min glassing [belly and the bottom of the wings only] came out at 14.6 oz. I didn't think to put it on the scale before the paint so I don't know how much the paint added. BTW none of the CF rods are installed yet either, that can't add very much.

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Old 10-05-2008, 05:16 AM
  #187  
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Here are the pix. The thrust tube in the pix are from my dear departed EJF Sport Jet 70mm EDF. It fits perfect in the back of the A-4's exhaust. I think I can get away without the thrust tube with this mod. The [SJ's] thrust tube is 55mm outlet size. I'm running the same power system that was in the SJ. It's a fan out of a stock Twister with the Himax motor. It won't be the fastest one here but it will fun.

CTD
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Old 10-05-2008, 07:00 AM
  #188  
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CTD

I'm interested how the cone works. On my A-4, I used the stock Twister fan/motor with no thrust tube. On 3s, I was disappointed. It flew, but barely. I'm running 4s, but the motor won't last (kicks ass though). My problem was I screwed up and glued the fan hatch on. Major PITA to get to the fan to add a thrust tube now.

John
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Old 10-05-2008, 05:50 PM
  #189  
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John,

I"ll let you know how the tube works. I have run my Himax 2825-3600 with no trouble on 4S. I might run a heat sinc just to be safer but the HS will only cover the last inch of the motor.

I checked on the Envirotex this morning. It is still very tacky. The bottle says up to 72 hours for full cure depending on the temp. It hasn't been to warm here so it might take a little longer to dry in my garage. I'd bring it in the house but it would have kitty paw marks on it in no time at all, LOL!!

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Old 10-05-2008, 07:08 PM
  #190  
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I'm not so sure on that. I can smell that hot electrical smell after the flight, even using throttle management and a cool down run.

John

Originally Posted by Crash Test Dummy View Post
John,

I"ll let you know how the tube works. I have run my Himax 2825-3600 with no trouble on 4S. I might run a heat sinc just to be safer but the HS will only cover the last inch of the motor.
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Old 10-05-2008, 07:22 PM
  #191  
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Just get a HET 2W-20 problem solvedlol. I know its not that easy but is a alternative if and when it gives up. Heatsink will help loads though.

Jason
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Old 10-06-2008, 03:25 AM
  #192  
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It's DONE!!!! Finally got all the painting and envirotex applied. I can touch it but it still has a bit of a tacky finish. It should cure out more over the next couple of days. I really like the finish of the Envirotex, it's not as strong as Finishing Resin or Epoxy but it is crystal clear when dry. No yellow cast like Finishing Resin. It really makes all your colors POP too. If you look at the finish it still looks wet, I can't even put into words how much I like this stuff. If you didn't want the high gloss finish you could just give a lite sanding and or give it a coat of spray on mat finish from a rattle can.

I think I"ll wait another day until I start installing all the gear. I still need to cut off all the control surfaces and hinge everything up. However the Envirotex wont like being man handled while it is still curing. I purchased some pinned hinges at the LHS the other day. I usually use CA hinges but I like the pin hinges better. I'm going to leave the rudder alone, everyone seens to agree that it isn't needed and if you apply too much rudder at slow speeds it can tend to want to roll in on you. I'll add it if I feel the need later, I really enjoy flying planes with rudders.........oh well we'll see.

CTD
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Old 10-06-2008, 06:22 AM
  #193  
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I got a weight on the A-4.

Before Envirotex 14.6 oz.
After Envirotex 16.0 oz.

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Old 10-08-2008, 07:38 AM
  #194  
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She is Finished!!! There are pix of the alieron set up, as you can see I won't have any worries about servos stripping. I had to add the horn for the rudder just in case I feel like fighting with another servo lead as I"m trying to fish it up to the receiver, lol. The weather is bad rite now but I hope to maiden her soon!!

CTD
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Old 10-08-2008, 10:33 PM
  #195  
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Well here are some pics of the repaint I just got done doing as I get ready for the decals that should arrive any day. I also posted the pics I used as a referance. Keep in mind this paint job was done free-hand with an airbrush and I know they are not exact but really close.

Jason
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Old 10-08-2008, 10:49 PM
  #196  
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Looks great Jason!! YOu gonna try the Evirotex?

CTD
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Old 10-08-2008, 11:57 PM
  #197  
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Dunno yet. I and actually gonna use some dull coat on some of the decals so they are dull like the paint. I kinda like the dull look on her as it gives that hard service life look. What I might do just to protect the decals and paint is a light PolyC semi or no gloss coat . Still tossing it up.

Jason
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Old 10-09-2008, 10:58 PM
  #198  
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Jason,

Yea, I was just saying to my bud Matt that poly will protect the paint really nice and be 1/4 the weight of the envirotex. Keeping it lite is always good.

<<<<<Update-Flight Report<UPDATE-FLIGHT Report>>>>>>

I got my maiden in this morning. My bud Matt hand launched her for me. He gave it a toss and I got to test how good the Glass and Envirotex worked, Augh!!! It didn't nose in, I managed to get the nose up as it went in so it kind of semi-pancaked in. Everything checked out ok so he gave it another toss. 1st I had him eat a bowl of Wheaties. It must have helped to give him the xtra energy he needed cause it left his hand and started to fly. She got up on step and required only a little down trim to fly nice. I flew her for only 4 min cause I only have a 2250 4S pack and I had to add his TP 2100 just to ger to balance at 175mm. Neither of us brought a parralle connector to the field, otherwise I could have had 4000+ Mah extending my flight time. I brought her around on final approach and she came in real nice at 1/4 throttle. It belly landed perfect and stopped rite at my feet!!! Impressive. There were some glo guy there and they were amaized that I could bring this jet in and land it rite at my feet, but really I give all the credit to the A-4. What a nice flying jet. I still might like the rudder mod. I really like having the rudder to fly. Hell, I find myself adding rudder when flying my Stryker or Fun Jet!! LOL!!
Anyway, we had 2 more packs to fly so I loaded up another battery and when I plugged it in. Trouble, the ESC wouldn't start the servos worked and then the didn't work 1 second later. Thats that. I'm thinging it might be time to call the NTSB however I don't think they will come unless there has actually been a crash. Hummm. I'm glad I got to fly it but I'm even happier it didn't get up in the air on the second flight and zip out on me. I'll do my own investigation tonight.

CTD
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Old 10-10-2008, 01:49 AM
  #199  
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Glad you got her in the air; hope you get the trouble worked out.

I'd like to be able to see that bird fly. But not in the gym!
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Old 10-10-2008, 01:53 AM
  #200  
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She could fly in the Gym...............once, LOL!!

CTD
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