What is sp. dm? - RC Groups
Nov 28, 2012, 03:59 PM
Registered User
Question

# What is sp. dm?

Under the wing load this airplane said 46.2g sp.dm. Im used to oz/sq ft. What is sp. dm and how can i convert it?
 Sign up now to remove ads between posts
 Nov 28, 2012, 04:18 PM Registered User 1 g/sq dm = .328 oz/sq ft, so 46.2 g/sq dm is 15.1 oz/sq ft....
 Nov 28, 2012, 04:21 PM AMA 754 ??? Sometimes, wing AREA is expressed as SQ. DM. (square decimeters), but I can't recall any metric units of weight that would fit 'SP'. Does this plane have an airspeed indicator calibrated in furlongs per fortnight?
 Nov 28, 2012, 05:28 PM Wake up, feel pulse, be happy! It's just a typo. Someone clearly didn't mind their "P"s and "Q"s, and now look what's happened
 Nov 28, 2012, 05:38 PM Rocket Programmer It's a nonstandard abbreviation for "grams per decimeter"
 Nov 28, 2012, 05:46 PM Registered User Thanks!
Nov 28, 2012, 05:48 PM
Registered User
Quote:
 Originally Posted by BobRCnut ??? Sometimes, wing AREA is expressed as SQ. DM. (square decimeters), but I can't recall any metric units of weight that would fit 'SP'. Does this plane have an airspeed indicator calibrated in furlongs per fortnight?
The replys are much appreciated, its just this made me smile cause I have no idea what a furlong or fortnight is But I have been trying to read alot. There is a big learning curve!
Nov 29, 2012, 04:12 AM
Registered User
Quote:
 Originally Posted by Dr.JJ The replys are much appreciated, its just this made me smile cause I have no idea what a furlong or fortnight is But I have been trying to read alot. There is a big learning curve!
1 furlong = 201 metres

1 fortnight = 2 weeks

Furlongs are an old obsolete measure of distance like ounces are also an obsolete measure of weight. At least one of them is still used in the USA.
 Nov 29, 2012, 06:51 AM Registered User None of them are obsolete, although furlongs and fortnights can be considered archaic... Last edited by pmisuinas; Nov 29, 2012 at 10:38 AM.
Nov 29, 2012, 07:07 AM
222 km/hr Parkjet flyer
Quote:
 Originally Posted by Mac50L 1 furlong = 201 metres 1 fortnight = 2 weeks Furlongs are an old obsolete measure of distance like ounces are also an obsolete measure of weight. At least one of them is still used in the USA.
And you coming from a Rugby and Cricket country ????

Nigel
 Nov 29, 2012, 08:10 AM An itch?. Scratch build. Furlongs and Fortnights are horse racing terms. The Furlong being a measure of distance. The Fortnight, how long before the horse you backed comes in.
 Nov 29, 2012, 08:16 AM Wake up, feel pulse, be happy! "Oh my, the dog's fur is getting long. Time for a trip to see the groomer." "Welcome to Fort Night: The giant lock-in slumber party in a genuine Civil War army post!"
 Nov 29, 2012, 08:30 AM An itch?. Scratch build. If I remember correct, there is a rough conversion of about 3:1 oz/sq.ft , times 3 = grams/sq.dm , (approximately) grams/sq.dm , divided by 3 = oz/sq.ft , (approximately).
 Nov 29, 2012, 10:40 AM Registered User That's a quite good approximation, will get you within 2%...
Nov 29, 2012, 05:08 PM
Registered User
Quote:
 Originally Posted by solentlife And you coming from a Rugby and Cricket country ???? Nigel
And I apologise for that. I've never played either of them. I played football, a game where the ball is moved by striking it with the foot, hence the name of it being (surprise, surprise) Football.

 Thread Tools

 Similar Threads Category Thread Thread Starter Forum Replies Last Post Sneak Peek for what's next from SP mdttb Micro Helis 15 Mar 31, 2005 04:28 PM What servos are in your Sp 400 sided pylon racer ? Kevin Murray High Performance 8 Mar 26, 2003 09:16 PM what to do with a Graupner sp 700bb 12v? splat man Power Systems 8 Nov 27, 2002 01:38 PM I currently have a 2m sp whats a good next step other than slope? SESH1975 Electric Sailplanes 0 Jan 19, 2002 11:17 PM What Prop For Sp-400 On Yard Boy budorren Parkflyers 5 Nov 01, 2001 03:32 PM