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Old Jul 30, 2010, 07:33 PM
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I decided to finish up, connect and attach the wings and stabs before finishing the top and bottom planking ... easier to work with and way too many wires and airlines to route.

Also, this allowed me a cleaner (sturdier) nosegear install

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Last edited by Herb; Jul 30, 2010 at 07:57 PM.
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Old Jul 30, 2010, 07:37 PM
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I checked the static fan rotor balance one more time on my $3 magnetic balancer, and then went ahead and installed the fan (semi-permanently) in the MiG-21 fuse ...

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Old Jul 30, 2010, 07:45 PM
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Once the Springair retracts were installed and tested, she was ready for one more picture:

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Old Aug 14, 2010, 03:16 PM
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Fiberglassing ...

I use 48g (3/4 oz) lightweight glass cloth for the front half of the fuse, and 18g ultralight weight cloth for the tail part. I got this excellent cloth from HC.

I apply the Z-Poxy laminating (finishing) resin with a disposable brush. I don't like spreading resin with a credit card like you are applying peanut butter ...

I heavily dilute the resin with propyl alcohol to save weight, undiluted resin adds a ton of weight and serves no purpose. The alcohol evaporates within a matter of minutes.

I fill the weave with krylon primer, which is a lot lighter and easier to sand than laminating resin (which is shell hard).

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Old Aug 18, 2010, 11:39 PM
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jean-claude Terrettaz
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The Mig look impecable, well done Herb...
I'm flying mine saturday on a sod farm, let you know.
Old Aug 20, 2010, 02:48 PM
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Thanks JC ... don't know about impeccable , seems a never ending story.

Good luck on you sod farm overflight

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Old Sep 04, 2010, 02:14 PM
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Paint, sand ... more paint, more sanding

Hinged all surfaces & installed linkages ...

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Old Sep 04, 2010, 10:57 PM
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jean-claude Terrettaz
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Again very nice Herb, I like the color. You are a great builder and I know you can fly those jets....
J-C
Old Sep 05, 2010, 10:13 PM
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The Delta 21 is a beauty...!!
Old Sep 06, 2010, 02:59 PM
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Thanks for the comments ... it might even fly ... someday
Old Sep 09, 2010, 04:39 PM
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I closed the hinge gap on all surfaces, to give a cleaner wing profile, and prevent flutter. I made the covers out of cheap drafting mylar.

The various linkages still need to be adjusted for travel (ie hole choice to give max mechanical advantage & least epa reduction).

I also made a foam plug for the fibegrlass linkage covers.

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Old Sep 17, 2010, 04:42 PM
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The MiG-21 "bottom work" is almost finished.

Tested the Springair retracts & steering, installed the tail sub-fin, cut out the cavernous wheel well openings, & touched up the paint a bit.

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Old Sep 17, 2010, 04:50 PM
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The top hatch is long enough to allow plenty of batteries to slide in there.

Unfortunately the batts have to go all the way forward, and into the cockpit area, to get the CoG right. Very cramped in there ...

The nose shock cone is, for now, removable.

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Old Sep 18, 2010, 07:24 PM
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Quote:
Originally Posted by Herb View Post
The top hatch is long enough to allow plenty of batteries to slide in there.

Unfortunately the batts have to go all the way forward, and into the cockpit area, to get the CoG right. Very cramped in there ...

The nose shock cone is, for now, removable.

.
Looks good Herb!!!! Now where is the radio so I can test fly that bad boy!!

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