New Products Flash Sale
Thread Tools
Old Jun 29, 2015, 07:44 AM
DaveB69 is online now
Find More Posts by DaveB69
Registered User
United Kingdom, Scotland, Dalkeith
Joined May 2015
21 Posts
Build Log
1944 Rigel glider x1.5 - SOS Build Off April 2015 to September 2015

Well, here we go - off work today as I hurt my back yesterday (trying to catch a hat falling off a table...) so as good a time as any to start this!

I'm still swithering (good Scottish word...) about whether this is going to be electric or just plain glider, I think I'll just get started and see how it goes. Initial impressions having printed the plan is that the fuselage looks enormous compared to the wings. The fuselage looks like it will be tricky to build straight.

The plans specify 'PSS' as the material for most parts - a wartime substitute for balsa? Mine will be balsa anyway.
DaveB69 is online now Find More Posts by DaveB69
Last edited by DaveB69; Jul 10, 2015 at 05:49 PM. Reason: Date should be July 1944 rather than 1943
Reply With Quote
Sign up now
to remove ads between posts
Old Jun 29, 2015, 08:36 AM
Sundancer is offline
Find More Posts by Sundancer
I like real wooden aeroplanes!
Sundancer's Avatar
South-west France
Joined Sep 2007
5,888 Posts
I've posted the link to this build log. I'm not sure what "PSS" stands for (other than "Power Slope Scale" - but it's obviously not that), as you say probably some balsa alternative (although in my view there ain't no substitute for balsa!) brought about by wartime shortages.

Diamond fuselages can be a bit tricky to get straight, you might like to consider some form of simple jig.
Sundancer is offline Find More Posts by Sundancer
Reply With Quote
Old Jul 02, 2015, 11:00 PM
RobtP is offline
Find More Posts by RobtP
Registered User
New Zealand, Wellington, Wellington City
Joined Dec 2014
34 Posts
Quote:
Originally Posted by DaveB69 View Post
The plans specify 'PSS' as the material for most parts - a wartime substitute for balsa?
P.S.S. apparently stood for "Premier Special Substitute", a balsa alternative marketed by Premier Aeromodel Supplies in the UK during the war years. This advertisement from September 1941 Aeromodeller doesn't say what the wood was, but the editorial in the same issue mentions other woods such as basswood, satinwood and obeche becoming available, so probably one of those.

The Rigel is a nice looking design.

Bob
RobtP is offline Find More Posts by RobtP
Reply With Quote
Old Jul 04, 2015, 03:25 PM
DaveB69 is online now
Find More Posts by DaveB69
Registered User
United Kingdom, Scotland, Dalkeith
Joined May 2015
21 Posts
Bob, thanks for digging that out, very interesting. I can't quite make out the sizes in the comparison table with balsa, but it looks like they were basically using one size down from what you would use with balsa.

Not much progress so far, I have managed to make a ply wing rib template which turned out too small, need to reprint it slightly scaled up.

I'm thinking I might build the fuselage split horizontally with triangular formers top and bottom, I stand a better chance of getting it straight that way.
DaveB69 is online now Find More Posts by DaveB69
Reply With Quote
Old Jul 04, 2015, 05:40 PM
JeffMac is offline
Find More Posts by JeffMac
I'd rather be flying.....
JeffMac's Avatar
United States, IA, Story City
Joined Oct 2013
1,001 Posts
This is an interesting glider and will be enjoyable to fly !

Best Regards,

Jeff
JeffMac is offline Find More Posts by JeffMac
Reply With Quote
Old Jul 04, 2015, 06:29 PM
Applehoney is online now
Find More Posts by Applehoney
Registered User
Ajax, Ontario, Canada
Joined Oct 2004
2,697 Posts
You have a straight square section under the wing; assemble the sides there (with a couple of temporary cardboard alignment formers, if the need for such is felt) and when dry pull in the nose to a front former, the rear so that the sides meet. Fill in spacers thereafter.

Diamond fuselages are only a regular box on its edge; not hard to build
Applehoney is online now Find More Posts by Applehoney
Last edited by Applehoney; Jul 04, 2015 at 10:09 PM.
Reply With Quote
Old Jul 04, 2015, 11:59 PM
RobtP is offline
Find More Posts by RobtP
Registered User
New Zealand, Wellington, Wellington City
Joined Dec 2014
34 Posts
Quote:
Originally Posted by DaveB69 View Post
I can't quite make out the sizes in the comparison table with balsa, but it looks like they were basically using one size down from what you would use with balsa.
This may be slightly clearer. It is taken off a scanned copy of the magazine and because this is a protected document I had to copy it as a screenshot. The original magazine scan, which is a little more legible, but not great, is here with the Premier advertisement towards the end of the magazine on page 528.
http://www.avia-it.com/act/bibliotec...01941%2009.pdf

I would go along with Applehoney on the build. Formers are indicated below each of the wing rest supports and another three spacers back which will guide the shape of the rear section.

Best wishes.

Bob
RobtP is offline Find More Posts by RobtP
Reply With Quote
Old Jul 05, 2015, 07:16 AM
DaveB69 is online now
Find More Posts by DaveB69
Registered User
United Kingdom, Scotland, Dalkeith
Joined May 2015
21 Posts
Quote:
Originally Posted by RobtP View Post

I would go along with Applehoney on the build. Formers are indicated below each of the wing rest supports and another three spacers back which will guide the shape of the rear section.
OK, you have both convinced me, I'll give it at try as per the plan

I was just imagining myself trying to get it straight in 2 planes at once and it all going horribly wrong! But I am probably over-thinking it.

Dave.
DaveB69 is online now Find More Posts by DaveB69
Last edited by DaveB69; Jul 05, 2015 at 07:18 AM. Reason: can't spell!
Reply With Quote
Old Jul 09, 2015, 03:08 PM
DaveB69 is online now
Find More Posts by DaveB69
Registered User
United Kingdom, Scotland, Dalkeith
Joined May 2015
21 Posts
Not had time to make much progress - I've blown up the wing rib drawing slightly so it better matches the wing plan, and glued the drawing to some 1/16" ply to make a template. I've sorted out 8 lengths of 5mm square pine strip that I had left over from another project, they'll make good wing spars. And finally I've tried using a ruler and knife to slice 1/4" balsa sheet into square strips - with mixed success
DaveB69 is online now Find More Posts by DaveB69
Reply With Quote
Old Jul 09, 2015, 07:17 PM
Applehoney is online now
Find More Posts by Applehoney
Registered User
Ajax, Ontario, Canada
Joined Oct 2004
2,697 Posts
1/4" sq. ? What on earth for ?
Applehoney is online now Find More Posts by Applehoney
Reply With Quote
Old Jul 09, 2015, 11:51 PM
Sundancer is offline
Find More Posts by Sundancer
I like real wooden aeroplanes!
Sundancer's Avatar
South-west France
Joined Sep 2007
5,888 Posts
Quote:
Originally Posted by Applehoney View Post
1/4" sq. ? What on earth for ?
It's scaled up x 1.5 Jim; although I would have thought 3/16" might be appropriate.
Sundancer is offline Find More Posts by Sundancer
Reply With Quote
Old Jul 10, 2015, 09:39 AM
Applehoney is online now
Find More Posts by Applehoney
Registered User
Ajax, Ontario, Canada
Joined Oct 2004
2,697 Posts
I missed the size increase .. but yes to 3/16" longerons and I would think 1/8" sq for spacers.

Even on the original size I wouldn't care for the wing mounts just glued to spacers, as shown
Applehoney is online now Find More Posts by Applehoney
Reply With Quote
Old Jul 10, 2015, 04:32 PM
RobtP is offline
Find More Posts by RobtP
Registered User
New Zealand, Wellington, Wellington City
Joined Dec 2014
34 Posts
The asterisks suggest formers (rather than spacers) below the wing mounts.
RobtP is offline Find More Posts by RobtP
Reply With Quote
Old Jul 10, 2015, 05:58 PM
Applehoney is online now
Find More Posts by Applehoney
Registered User
Ajax, Ontario, Canada
Joined Oct 2004
2,697 Posts
Presumed to be alignment formers when joining sides. Even if left in the fuselage it makes no difference to the fact that the mounts are simply glued to the outside of the relevant spacers, as shown.
Applehoney is online now Find More Posts by Applehoney
Reply With Quote
Old Jul 10, 2015, 06:00 PM
DaveB69 is online now
Find More Posts by DaveB69
Registered User
United Kingdom, Scotland, Dalkeith
Joined May 2015
21 Posts
3/16" for the longerons was my intention, but when I saw the size of the fuselage printed out 1/4" didn't seem out of place. Whatever the size, actually getting them is the problem I'm having.

Sorry, I forgot to put in the title that it's scaled up x 1.5, will change it.

Off on holiday for a week so no more modelling for a week.
DaveB69 is online now Find More Posts by DaveB69
Reply With Quote


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Windrush II - SOS Build Off April 2015 to September 2015 cpmcgraw Vintage & Old-Timer Designs 85 Yesterday 11:00 AM
Build Log Skyleada Amphibian for SOS Build Off April 2015 to September 2015 brokenspar Vintage & Old-Timer Designs 38 Jul 04, 2015 03:05 PM
Build Log Skyleada Scale Gliders - SOS Build Off April 2015 to September 2015 -Balsa- Vintage & Old-Timer Designs 11 Jul 03, 2015 08:17 AM
Build Log KK Conquest - SOS Build Off April 2015 to September 2015 FINISHED -Balsa- Vintage & Old-Timer Designs 18 Jun 26, 2015 04:32 PM
Build Log Walt Musciano's Nimbus Nudger for SOS Build Off April 2015 to September 2015 brokenspar Vintage & Old-Timer Designs 31 May 07, 2015 06:14 AM