28-11-2009, 05:36 PM
To start things off, I'll rop some pictures and a vid of my experiment with SPAD. This is based on the FNS 0.15 design. However, this is based on the use of Canadian square PVC downpipe. I've substituted a 16mm Ally channel for the fuse and made experimental motor mount to suit a slavages EMax motor.
The first pseudo-maiden proved that
1. the prop was way too small
2. the wheels were way to small
I measured the thrust of the 7x5 prop by standing the model vertically on kitchen scales (in the lounge room) and gunning the motor. I got about 400g of thrust against an 820g model. A 10x4.7 prop gave almost 800g thrust but the motor was getting warm with the load.
Regardless, my next try will be a quick hop wit hthe 10" prop as I don't have any 9" props about and I get pretty twitchy impatient at this point of building somenthing
The first pseudo-maiden proved that
1. the prop was way too small
2. the wheels were way to small
I measured the thrust of the 7x5 prop by standing the model vertically on kitchen scales (in the lounge room) and gunning the motor. I got about 400g of thrust against an 820g model. A 10x4.7 prop gave almost 800g thrust but the motor was getting warm with the load.
Regardless, my next try will be a quick hop wit hthe 10" prop as I don't have any 9" props about and I get pretty twitchy impatient at this point of building somenthing
Drew
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Built-up
Balsa: Commercial: Depron:
Great Planes PT-20 (modified) HK Hawk 80 Index 3
Indoor Thingy Skyartec Cessna 182
Katana X lite (in construction) UM SU-26 12"WS Shoestring (Plantraco)
HK Extra 260
and a Fox chuck glider converted to RC
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