"1/2 A" & "1/8 A" airplanes These are the small ones...more popular now than ever.

1/2a speed delta

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Old 05-04-2005, 10:21 AM
  #126  
ptulmer
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Default RE: 1/2a speed delta

Your name is familiar, but I can't place it....
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Old 05-04-2005, 10:59 PM
  #127  
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Default RE: 1/2a speed delta

Hi ya there PT !!!! Well I "dusted" off the MD and threw some monokote on it. covered and installed the elevators, made up the pushrods,covered the fins,
charged and tested the battery pack (junk),and tested the servos and reciever. Looks like everything will go together well. I have a secret weapon
to mount on the front compliments of JM !!! It's looking very lawndartish which somehow pleases me...

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Old 05-06-2005, 08:19 PM
  #128  
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Default RE: 1/2a speed delta

coming in sub 9oz. on this one...just about done...

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Old 05-07-2005, 01:52 AM
  #129  
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Default RE: 1/2a speed delta

Looking forward to seeing it Curry,

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Old 05-12-2005, 11:54 AM
  #130  
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Default RE: 1/2a speed delta

GOTERDONE !!!!!!!!!!!!! 8.75 OZ.....And one fine Norvey from Japanman !!![8D]
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Old 05-12-2005, 11:56 AM
  #131  
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Default RE: 1/2a speed delta

well.....that's not what I wanted to do..lets try again...
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Old 05-12-2005, 12:23 PM
  #132  
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Default RE: 1/2a speed delta

Awsome man!
I bet its gonna rip- Lets just hope that resin I used on the engine hangs in there!

I`m also really interested to hear how your idea about using gyros for stability control works out-

Stefan
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Old 05-12-2005, 12:54 PM
  #133  
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Default RE: 1/2a speed delta

I'll bet this one does alright! Is that right thrust I see in the photo?. The best way to check thrust is to bolt something long and straight[ aluminum angle or yardstick] up to the prop shaft, lay the plane down on its' nose, so the long "checking tool" lays flat on the table ,[of course you will need to drill a hole in your table for the prop nut to pass through], now all you have to do is take measurements from each wingtip down to the table and adjust the engine on its' mount until you nail it. Then wick some thin CA in there to keep the engine from shifting. A plane this tiny and powerful needs to be dead on.[DFO].





'
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Old 05-12-2005, 12:56 PM
  #134  
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Default RE: 1/2a speed delta

I'll bet this one does alright! Is that right thrust I see in the photo?. The best way to check thrust is to bolt something long and straight, [maybe an aluminum yardstick, or angle stock] up to the thrust washer, lay the plane down on its' nose, so the long "checking tool" lays flat on the table ,[of course you will need to drill a hole in your table for the prop nut to pass through], now all you have to do is take measurements from each wingtip down to the table and adjust the engine on its' mount until you nail it. Then wick some thin CA in there to keep the engine from shifting. A plane this tiny and powerful needs to be dead on.[DFO].





'
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Old 01-02-2018, 11:05 PM
  #135  
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Then 2005 ...now 2018. With all the new technology and gadgetry these days I reckon it may be time to revisit this thing.
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Old 01-03-2018, 09:38 AM
  #136  
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Did you ever get some full flights in with these? I know I have trouble seeing them at the end of the field. You got some famous names in this thread. Larry Driscoll, XJet, Combatpigg...... I like the rear exhaust Norvels. Maybe I should try that some day. Japanman looks as though he ground off the screws that mount the cylinder or something. Kind of grainy photos. Antique cameras from 13 years ago.
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Old 01-03-2018, 10:43 AM
  #137  
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Well....yes and no. It flew but I never really got in control of it well enough to put some passes with it. I planted it in the ground but both airframe and engine survived if I remember right. I still have the engine. I moved to Texas right after and didn't start actively flying again for some time except for my dnu and cloud ranger. I moved on to the bigger planes but everyone at the field loves when I bring the dnu so I thought I would revisit 1/2a
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Old 01-03-2018, 11:33 AM
  #138  
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I moved too. It is pretty windy here for 1/2A. A .15 is good. Some pics here, the blue foam is 1/2" and ok for 1/2A. That one is an AP .09 and pretty big at 36" and 24" long. Still not finished since 2014.Likely will put on a pipe if it flies ok. You could make a quick one maybe the same dimensions and outlines as what you have. The white one is a 1/2A control line speed, monoline and it never really got too high off the ground. Wore the prop down.very small. It was a gift.probably over 30 years ago.(40?)
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Old 01-03-2018, 07:57 PM
  #139  
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The foam route might not be bad idea for making up a few really quick. The balsa ones were coming out pretty light. I think the carbon rods I was using back then are likely useless and heavy for something this small.
I think I'll go with some light wood dowels this time. I have a cnc router these days so I can whip out the parts really fast. Covering takes longer than the air frame build.
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Old 01-03-2018, 08:30 PM
  #140  
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3mm carbon tube would work at the CG, trailing edge and down the center would stop any troublesome flexing in it's tracks.
CNC router airfoil foam delta with some carbon tissue for 1/2A size.
There is carbon tissue open weave cloth being used by the glider guys with very good results keeping the foam together
without adding as much weight over full weave. I want to use this over balsa core wings single layer over the full span
and another 4" to 6" wide layer over the center section.


Here found a description:

Carbon fiber tissue is an advanced non-woven fiber veil incorporating 100% carbon fibers bonded together in a random fiber matrix. It is compatible with all epoxy and polyester resin systems and can be used to provide a smooth covering for bulk carbon composite structures and to add stiffness with minimal weight gain. Weighs just under 12 grams/square meter
500mm x 1000mm (19.5" x 39")

https://www.ebay.com/itm/Carbon-Fibe...MAAOSwAPVZEkwl

Would have to use a vacuum bag or rap with saran rap sit over night then sand to a smooth polished finished
to show off the carbon or just paint.

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Old 01-04-2018, 08:32 AM
  #141  
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Too bad Combatpigg hibernated, I think he made his with 1/4" square balsa LE and spars. He made a bunch. They were pretty simple and very fast with Profis or .12s. It was a while ago and I can't remember all the details.
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Old 01-04-2018, 08:59 AM
  #142  
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Yeah he likely got tired of the thin skin people. He was a great resource. I'm still at work for a couple of weeks. I'm going to order up some radio gear to have waiting for me when I get home
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Old 01-05-2018, 07:09 AM
  #143  
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Here is one of his delta builds, quick build and a quick flyer as usual! THE ASP.12 THREAD

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