By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

French Balsa designations on Plans

All Topics | Latest Posts

Search for:  in Thread Title in  
Tim @ ModelMarkings.com11/01/2017 10:12:29
avatar
436 forum posts
198 photos

I am building a Slope Glider from plans out of the French Looping Magazine.

The Plans use Balsa designations such as 20/10 and 30/10, what do they mean? I assume thickness and density. I can make out most of rest the detail from my schoolboy French

brokenenglish11/01/2017 10:17:47
avatar
241 forum posts
21 photos

Think of it as "tenths of a millimetre".

20/10 is 2mm, 30/10 is 3mm

It's a traditional French method of expressing sheet thickness (it's not used for strip), and it's not only balsa either, it's also used in engineering for metal plate thickness.

Bob Burton11/01/2017 10:40:55
160 forum posts
Posted by brokenenglish on 11/01/2017 10:17:47:

Think of it as "tenths of a millimetre".

20/10 is 2mm, 30/10 is 3mm

It's a traditional French method of expressing sheet thickness (it's not used for strip), and it's not only balsa either, it's also used in engineering for metal plate thickness.

Tenths of a millimetre ? Micro modelling at its best !

Tenths of a centimetre perhaps ?

Don Fry11/01/2017 10:47:12
avatar
1820 forum posts
25 photos

Doing my head in actually thinking about it, but brokenenglish is right. A weird concept, but so is some of the cuisine, but tastes fine.

brokenenglish11/01/2017 10:49:10
avatar
241 forum posts
21 photos

No Bob, tenths of a millimetre, i.e. 30 tenths = 3 (of anything), but in this case it's millimetres... OK?

McG 696911/01/2017 11:34:09
avatar
1621 forum posts
716 photos

Hi to all,

Brokenenglish is right here.

It was originally used for thin high quality sheet metal, with the thickness expressed in tenths - 'dixièmes' - of a millimeter.

As said "30 tenths" (30/10) of anything equals 3... well, it does in Belgium anyway... wink

Cheers

Chris

 

Edited By McG 6969 on 11/01/2017 11:35:12

David Davis11/01/2017 12:14:10
avatar
2649 forum posts
446 photos

Quite so.

When they want to refer to the size of strip, they use an X in the middle of the numbers. For example 6X6 is 6mm by 6mm. At least, that is what is printed on my Baron1914 plan, which is a model as well-known in France as a WOT 4 is in England. They are rather different models mind!

For those who have difficulty with the metric system, 3mm is about 1/8", therefore 6X6 is the equivalent of 1/4" square.

Tim @ ModelMarkings.com11/01/2017 13:03:21
avatar
436 forum posts
198 photos

OK, Thanks,

One other thing, on the plan is shows two jig templates one at 45deg (for the Winglets) and one at 1deg? , but cannot make sense of the French Gabarit pour Diedre de l'aile, any ideaswp_20170111_12_55_15_pro[1].jpg

Max Z11/01/2017 13:10:32
avatar
386 forum posts
175 photos

MPosted by Tim @ ModelMarkings.com on 11/01/2017 13:03:21:

but cannot make sense of the French Gabarit pour Diedre de l'aile, any ideas

= Template for the wing dihedral.

Max.

McG 696911/01/2017 13:26:24
avatar
1621 forum posts
716 photos

Hey Tim,

Max is absolutely right.

"Template for the wing dihedral > 1°"

"Template for the winglet dihedral >45°"

If you have any other 'dark' zones, please post them here, as that's we're here for, I guess.

Cheers

Chris

Edited By McG 6969 on 11/01/2017 13:26:54

Ernie11/01/2017 16:22:09
avatar
2363 forum posts
3 photos

Gabarit pour diedre d'aile

Template for wing dihedral...Caution is advised re metric and UK thread sizes..They nearly match, but not quite

ernie

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Email News - Join our newsletter

Love Model Aircraft? Sign up to our emails for the latest news and special offers!

Latest Forum Posts
Support Our Partners
Expo Tools 14 July
Wings and Wheels 2018
electricwingman 2017
SHREK
Overlander
CML
Gliders Distribution
Advertise With Us
Latest "For Sale" Ads
How has your building graduated?
Q: Did you start with ARTF and move to building from kits or vice versa?

 Started with ARTF moved to building from kits only
 Started with ARTF moved to building from plans only
 Started with ARTF moved to building from kits and building from plans
 Started with building kits or from plans and moved to ARTF
 I only build from kits or plans
 I only build ARTF
 I only build from kits
 I only build from plans
 Other (Please specify in thread)

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us