I have a weight problem.

I stripped the paint off a lightweight mounting bike frame once.

The weight difference before and after was 16 grams!

Edited By Chris Pocock on 03/06/2013 23:40:12

I was the weights engineer for a Jetstream 41 aircraft interior for a year. Great fun. If you like adding up the weight of everything to the last 0.001 lbf (equivalent to a 92mm square of photocopier paper).

With two coats of aircraft interior thickness paint, you are looking at 0.01 lb/ft^2. HOWEVER, one panel I followed through the entire manufacturing process to find out why the interior was too heavy, and measured a sidewall panel and window reveal before painting as 1.5 lbf, and after painting its weight had doubled. The panel was 4ft long and 3.5 ft high by 0.125" thick.

Regards,

Richard

Hi Richard,

For a while my stepson did the similar but wholly different(!) task of assigning post containers to their positions when loading freight aircraft. Beleive it or not he only got 10-15 minutes and the supplied equipment was a biro and a sheet with pictures of the plane on it. There was a formula to follow but you had to start out by selecting the heaviest ones for either side of the c of g. The containmers were loaded using a semi-automatic system. He used to cheat and use the calculator on his phone. Apparently if you may a poor job of it the result was potentially a crash or an upset pilot - he claims never to have caused either. Apparently the pilot was meant to cross check the calculations but as an error would have meant unloading and reloading the plane...

Neil

Testing time just in the weight limit 16lb maximum.

Sunday will see if the redesigned piston improves performance providing there are no breakdowns.

Some of the problems that might arise flash steam generator breaks down, crankshaft fatigue, propeller breaks plus the possibility to become airborne or submersible.

Paul

Edited By jason udall on 07/06/2013 17:20:14

Had a frustrating day that ended not too bad for first meeting of 2013.

First two runs ended suddenly on the second lap it turns out everything is running hotter since trying the new piston.

Did an engine strip and gave more clearance to inlet valve (shim job) on my last attempt did an average speed of 120.9 mph with one lap at 122 mph will have to reduce clearance by a couple of thou and might get back to last years speed?

High light of the meeting was Ron Hankin with his IC engined hydroplane breaking a record over 130mph with a lap at 136mph (things to come).

As usual a very enjoyable day thanks to Kingsbury model boat club and all the helpers.

Paul