View Single Post
Old 10-01-2012, 08:15 PM   #1
pd1
Still Learning
 
pd1's Avatar
 
Join Date: Sep 2006
Location: North of Boston
Posts: 4,017
View pd1's Gallery69
Thanked 577 Times in 539 Posts
Club: Cape Ann RC Model Club
Awards Showcase

Globetrotter Pilot  WAA-08 Pilot  Outstanding Contributor Award 
iTrader: (6)
Friends: (53)
Default #26 Model airplane build clinic... Astro Hog.. It flew

Parts is parts
I'm building an old Sig Astro Hog kit. The kit I'm using is from 1983.
Click image for larger version

Name:	hog-box1w.jpg
Views:	280
Size:	69.0 KB
ID:	162984 Click image for larger version

Name:	trim-on-rear6.jpg
Views:	179
Size:	137.9 KB
ID:	164312 Click image for larger version

Name:	pinstripe-side7.jpg
Views:	213
Size:	132.7 KB
ID:	164471 Click image for larger version

Name:	pinstripe-start5.jpg
Views:	160
Size:	142.5 KB
ID:	164472
Almost ready to fly
Click image for larger version

Name:	outside-front7.jpg
Views:	148
Size:	133.4 KB
ID:	164592 Click image for larger version

Name:	outside-side9.jpg
Views:	131
Size:	134.2 KB
ID:	164593 Click image for larger version

Name:	outside-top11.jpg
Views:	161
Size:	133.9 KB
ID:	164594

More first flight pictures at last post
Click image for larger version

Name:	ready2.jpg
Views:	54
Size:	126.3 KB
ID:	170588 Click image for larger version

Name:	invert12.jpg
Views:	48
Size:	131.7 KB
ID:	170589 Click image for larger version

Name:	start-to-flair24.jpg
Views:	48
Size:	146.4 KB
ID:	170590

This is a newer version of the original Berkeley kit. The construction is a little more complicated than a nice laser cut kit, but still a fun build.

Step one. Take an inventory of the supplied parts. All I was missing was the decal.
Click image for larger version

Name:	box-o-wood3.jpg
Views:	234
Size:	125.1 KB
ID:	162985

Start building the parts to make the plane. The ribs need plywood doubler's added, spars have to be reinforced and the wing tips have to be laminated.
Click image for larger version

Name:	making-parts5.jpg
Views:	224
Size:	137.1 KB
ID:	162986 Click image for larger version

Name:	ribs7.jpg
Views:	204
Size:	135.4 KB
ID:	162987

I used a piece of left over spar to stack the ribs and sand them so they are all the same. Die cut ribs always have variations between ribs. A little sanding and they're nice and straight.
Click image for larger version

Name:	rib-stacked8.jpg
Views:	223
Size:	140.1 KB
ID:	162988 Click image for larger version

Name:	ribs-sanded12.jpg
Views:	224
Size:	133.9 KB
ID:	162989 Click image for larger version

Name:	ribs-trued-up14.jpg
Views:	222
Size:	73.8 KB
ID:	162990

Wing tip parts Click image for larger version

Name:	tip-parts6.jpg
Views:	221
Size:	133.2 KB
ID:	162992

Spar pinned down and ribs glued to bottom spar. Hole in ribs were added to allow servo wire to pass through. I'll be using two servos instead of the single servo with torque rods.
Click image for larger version

Name:	right-wing15w.jpg
Views:	226
Size:	136.9 KB
ID:	162991

I added the trailing edge sheet for the top and the wingtip.
Click image for larger version

Name:	wing-tip-on1.jpg
Views:	192
Size:	155.1 KB
ID:	163063 Click image for larger version

Name:	wing-tip-on2.jpg
Views:	229
Size:	125.6 KB
ID:	163064

The plans called for bending the 1/4 inch square spar to go over the end rib and attach to the wing tip. To relieve stress, I used a razor saw and made a small cut on the bottom of the spar at the last rib.

The spar bent easily and I've since sanded the tip and added the gear blocks. Some sheeting and I'll start the second wing half.

Second half same as the first.


Attached Thumbnails
Click image for larger version

Name:	leading-edge-sheet1.jpg
Views:	205
Size:	142.7 KB
ID:	163143
Click image for larger version

Name:	second-wing-start2.jpg
Views:	220
Size:	148.8 KB
ID:	163144
Click image for larger version

Name:	wing-tip-glued3.jpg
Views:	212
Size:	150.0 KB
ID:	163145
Click image for larger version

Name:	trailing-edge-sheet5.jpg
Views:	198
Size:	131.8 KB
ID:	163146
Click image for larger version

Name:	webbing5.jpg
Views:	186
Size:	133.2 KB
ID:	163147
Click image for larger version

Name:	second-tip6.jpg
Views:	166
Size:	142.4 KB
ID:	163148
Click image for larger version

Name:	first-tip-top7.jpg
Views:	162
Size:	133.6 KB
ID:	163149
Click image for larger version

Name:	spar-joiners8.jpg
Views:	161
Size:	125.5 KB
ID:	163150
Click image for larger version

Name:	spar-joiners-on9.jpg
Views:	166
Size:	149.0 KB
ID:	163151
Click image for larger version

Name:	spar-joiners11.jpg
Views:	166
Size:	148.6 KB
ID:	163152
pd1 is offline  
  Reply With Quote
 
Page generated in 0.54543 seconds with 28 queries