About this Plan
Bridi GLA (Great Little Airplane). Radio control 4 channel basic trainer. Shoulder wing layout. Wingspan 59-1/4 in, wing area 625 sq in, for .25 to .45 engines.
Later kitted by Bridi Hobby Enterprises.
Quote: "This four-channel trainer is truly a 'Great Little Airplane'. Follow the step-by-step instructions and you can't go wrong.
Designed by Joe Bridi. Text and photos by Al Tuttle.
Construction of the 'Great Little Airplane' is straightforward and requires no exotic or odd-size materials. All hardware is readily available from your hobby dealer. The canopy, dural landing gear, and motor mount are available from Bridi Hobby Enterprises, 1611 E Sandison St, Wilmington, CA 90744.
Because this aircraft is aimed at the newcomer to radio control, the instructions may seem to be oversimplified to you old-timers - remember, we were all neophytes once. For example, you will notice that I keep harping about minimum or no gap at the control surfaces. Though a seemingly insignificant point, much of how well or how badly the aircraft performs is due to this little detail. How many newcomers (and 'experts' too) have you seen at the field who wonder why their aircraft response in the air is so sloppy, only to find a gap of 1/16 or more at the control surfaces? If the instructions are carefully followed, you should end up with a straight, strong, and excellent flying basic trainer.
For adhesives to use, I'd recommend 5-minute and 30-minute epoxies, Hobbypoxy Formula 2 epoxy, Wilhold or Franklin aliphatic resin (Titebond), Hot Stuff, ZAP or its equivalent, and Duco cement or its equivalent for attaching the canopy, although the cyanoacrylate adhesives (Hot Stuff, etc.) can also be used.
To make sure all parts - such as leading and trailing edges, empennage, and control surfaces - get sanded evenly and straight, make up a couple of sanding blocks to be approximately 12 to 18 in long and 2 to 3 in wide. I use 1/2 x 3 in wide aluminum channel stock with the sandpaper attached to the block with double-sided tape. This makes it easy to replace the worn-out sandpaper. The building sequence is as follows: wing and ailerons, empennage, fuselage and hatch, final-sanding and covering, and equipment installation.
Read each step completely and carefully!
WING CONSTRUCTION: Pre-construction:
1. Cut 22 ribs from 3/32 sheet balsa stock.
2 Make four trailing edge pieces 7/8 wide from 3/32 sheet balsa and cut to length.
3 Cut to length: four 1/4 x 3/8 balsa spars, two 3/8 x 3/4 balsa leading edges, and two 3/16 x 1/4 trailing edges.
4. Cut two ailerons 1-1/16 wide from 1/4 sheet balsa. Do not trim to length or round edges yet. Note: If stick stock is not available, the spars and trailing edges can be stripped from 1/4 sheet stock..."
Supplementary file notes
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by Joe Bridi
from Model Airplane News
all formers complete :)
got article :)
Found online 19/03/2019 at:
Format: • PDFbitmap
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User commentsThis is a photo of the GLA that I built from a short kit from BalsaWorkBench see http://www.balsaworkbench.com/. Like all of Joe Bridi designs, it flies great [main pic, 003].
Ray Phillips - 04/01/2021
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