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G&L 1/5 DHC chipmunk - diary of a build.

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G&L 1/5 DHC chipmunk - diary of a build.

Old 10-14-2014, 11:56 AM
  #926  
FlyerInOKC
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I knew you would be Steve!
Old 10-14-2014, 12:55 PM
  #927  
RCKen
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Originally Posted by FlyerInOKC View Post
Hi my name is Mike and I'm a Buildaholic!

It seems once the airplane is built I start to lose interest and start another build. I do get around to flying them at some point but its not a priority. Its the building I love the most!
If I stall on a build there is one step in the building process that I always stall at........ sanding. It never fails. If you look around my shop/building area/office you will see many unfinished planes and they are all stalled at the same place, ready for sanding. Why?? Because I HATE SANDING WITH A PASSION. Period. Plain and simple. I just don't like to do it. So when I get to the sanding stage I know that I'll need to take everything out to the sunroom and setup and start sanding. And that delay in getting ready to haul it all out there many times will draw into minutes, hours, days, weeks, months...... Eventually I'll have a crash that needs repaired, an ARF I need to setup, of something else and I'll move the kit off the building board and there you have it, the kit has now been moved to the dreaded "I'll get back to at some point" pile!!!! Thinking of the top of my head right now (I'm at work and my shop is at home so I can't look at what's actually there) here's what's made it into that unfortunate pile. Great Planes Ultimate Bipe, Goldberg Extra 300, Dynaflite Super Decathlon, and a Ultra Sport 60. All need to be sanded!!!!!

Although I may have some relief that might help out. When Jim Buzzeo and I cleaned out Minnflyer's (may he rest in peace) shop earlier this year Minnflyer had build a sanding block that you hook up to your shop vac and sand on. When I get to the point of sanding on my next build I'm going to try sanding on that and see how it does. If it keeps the dust I might be able to keep my projects on track in the future!!!!

Ken
Old 10-14-2014, 12:58 PM
  #928  
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I would like to see that block Would you post a picture?
Old 10-14-2014, 07:04 PM
  #929  
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Originally Posted by FlyerInOKC View Post
I would like to see that block Would you post a picture?
I'll get out tomorrow and get some pictures of the sanding station he built and post them for you.

Ken
Old 10-15-2014, 02:05 AM
  #930  
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What stalls my builds is repetition. When I build something from scratch and design it, like custom hinges or control surfaces. I spend a lot of time building one wing panel then I have to repeat it for the other panel, I stall at that point. I now try to do both at the same time, seams to help the "stall"

I too am a buildahalic!

TB

Last edited by TonyBuilder; 10-15-2014 at 02:58 PM.
Old 10-31-2014, 10:03 PM
  #931  
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Hello TonyBuilder or Gooday Mate !

I congratulate you on your excellent build of the Chipmunk , Nice job.
I have a black horse Chipmunk myself with a Moki 2.10 in it. Would I be eligible for the Chipmunk Brotherhood?

I have been reading your post number 250 dated 06-30-2014 on page 10 and it was nice to see that you mention of the agriculture conversion of the chipmunk that was done in Australia by Sasin - Aerostructures , the S A 29 Spraymaster.

I would like to let you know I was employed by Mike Sasin in my early days as an up
coming aircraft engineer and did a lot of work on the chipmunk conversion, manufacturing, refurbishment and overhaul of the airframe. The whole airframe internal and top deck was removed, fiberglass hopper 55 gallon/200 liters made and installed where the front seat was, new swing swing rudder pedals with toe brakes made and installed, rear seat redesigned with crash absorbing foam seat/back rest to prevent severe back injury in a crash, was raised 11" for better visibility over the nose.

Rollover truss, windscreen installed, new redesigned instrument panel and rear sliding canopy made, battery box installed behind engine firewall, dorsal fin and anti spin strakes made and installed, a new bulkhead made to mount the leaf spring scott tail wheel assembly.

Goodyear wheels and disc brakes fitted plus a lot of other mods done. In total three
SA-29 where built VH- SJD,VH-BCA,VH-GEB.



The first fuselage did not fly, was used as a tooling jig to make the components for the flying aircraft.

Mike Sasin did a lot of flight testing to satisfy the civil aviation Athority to get the aircraft approved and certified.
The colour schemes VH-SJD was red and white, VH-BCA, VH-GEB was blue and white.

This takes me back a lot of years as I am retired. I also keep in contact with old boss Mike Sasin.


The sad part about this was VH-SJD crashed beyond repair but the pilot survived some back injury he is ok, I keep in touch with him. ( run out of fuel on take off, tried to turn back to land ).

VH-BCA has been restored to a normal Chipmunk except for the tail wheel.

VH-GEB has been sold to USA and modified for aerobatics as N7DW.

Best regards,
Eddy P51




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Old 11-13-2014, 07:25 AM
  #932  
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TB, did you see this thread on the other board(Link below)? It made me think of your cowling.

Mike

http://www.rcgroups.com/forums/showthread.php?t=2277006
Old 11-14-2014, 06:24 AM
  #933  
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Hi Tony... excellent job....I have a question... How do you do the rivets? any template?

Thanks
Old 11-14-2014, 06:35 AM
  #934  
jsanchez581
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Tony, what kind of settings do you have in the help spray gun? pressure?

Thanks!
Old 11-14-2014, 02:38 PM
  #935  
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Originally Posted by jsanchez581 View Post
Hi Tony... excellent job....I have a question... How do you do the rivets? any template?

Thanks
Free hand.

TB
Old 11-14-2014, 02:39 PM
  #936  
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Originally Posted by jsanchez581 View Post
Tony, what kind of settings do you have in the help spray gun? pressure?

Thanks!
If memory serves my it was in the 20psi rang. The airbrush was set higher.

TB
Old 11-14-2014, 02:54 PM
  #937  
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I set my HVLP gun at around 50 psi. On The Gague, and it drops to around 20 or 25 psi. With the trigger pressed. Hope that helps.
Old 11-14-2014, 03:03 PM
  #938  
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The pressure can also depend on the paint. Best to do some test runs to find the optimum for your situation. I generally find I am between 30-35lbs.
Old 11-14-2014, 03:12 PM
  #939  
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As Steve stated I was getting around 20-25psi with the trigger depressed. 50psi at the compressor.

TB
Old 11-14-2014, 08:36 PM
  #940  
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I have found if you use a short section of 1/4" hose ( 8-10' is good ) called a whip and put your regulator between it and the feed hose which should be 5/16" and not longer than 25', if longer then the feed hose should be 3/8". This prevents the pressure drop (serge) at the gun. A small gun regulator will work also, I use both, the one at the gun is great for quick pressure changes if you change the spray fan while painting.

Leroy
Old 11-17-2014, 07:49 AM
  #941  
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Everyone talks how good is the klass kote paint and I don't doubt it. I don't know what I am doing wrong, but his is the result that I am getting (this is primer, but also had the same thing with colors).. can you please tell me wants is the issue (look at the picture to see the "dots")?
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Old 11-17-2014, 11:25 AM
  #942  
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Originally Posted by jsanchez581 View Post

Everyone talks how good is the klass kote paint and I don't doubt it. I don't know what I am doing wrong, but his is the result that I am getting (this is primer, but also had the same thing with colors).. can you please tell me wants is the issue (look at the picture to see the "dots")?
Hello jsanchez581,

What you see ( and we do ) is not likely to be due to the paint you use.
It appears to be drops of liquid paint dripping from the gun and is likely due to a lack of pressure at the gun nozzle; not enough atomization or the fluidity of the paint.

See if you can check and adjust the pressure or the dilution of the paint.

Is the surface vertical or horizontal when spraying ?

Zor

Last edited by Zor; 11-17-2014 at 11:29 AM.
Old 11-17-2014, 11:55 AM
  #943  
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I was horizontal. Preassure was around 15psi. I wll try with 30-40 psi and see. Thanks for the advice. I will let you know mu results.
Old 11-17-2014, 12:06 PM
  #944  
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Those look to be where particles were on the surface and the primer was sprayed to heavy, when both of those come together it creates what appears to be small air pockets that burst. Next go around make sure to tack rag it a second or two prior to spraying, use 30-35lbs pressure, and you may even need to thin the primer a tad.
Old 11-17-2014, 12:50 PM
  #945  
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Also, the biggest thing, that will save time and frustration, is practice. Preferably on a surface similar to what you want to spray. Experiment with different pressures and distances and find what works best. Good luck.
Old 11-17-2014, 04:15 PM
  #946  
TonyBuilder
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My primer went on smooth as silk. I do three or four thin coats. 15 psi is not enough pressure I would think. The primer/ paint dries fast so do a test piece and if it looks good go for it. The results should be present on your test piece immediately so just play with the pressure/ gun. Also you should be thinning the primer/ paint.

TB
Old 11-20-2014, 04:29 AM
  #947  
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Originally Posted by jsanchez581 View Post
Everyone talks how good is the klass kote paint and I don't doubt it. I don't know what I am doing wrong, but his is the result that I am getting (this is primer, but also had the same thing with colors).. can you please tell me wants is the issue (look at the picture to see the "dots")?
Those look more like solvent pops or expanding air pockets in the substrate under the finish caused by an elevated temperature change to early during the primer cure or dry cycle, did you spray in ascending temperatures, or in the sun, or move your item from the place you sprayed into a much warmer area?

Bob
Old 11-20-2014, 02:34 PM
  #948  
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+1 on the last grope of post

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