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Aug 29, 2018, 09:04 AM
parkcityskier's Avatar
Originally Posted by Hal Norrish
Looks Very nice, Mike. Can we look forward to seeing it in Chilliwack in 2109
That's a long time to wait to see it

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Aug 29, 2018, 12:42 PM
Slip the surly bonds...
Sopwith Mike's Avatar
Thread OP
A few facts and figures:

Span is 100", slightly more than Ivan's because I drew up the wingtips to a different profile.
Weight 120 oz, just 3 oz more than Ivan's, so the wing loading is the same at 13.5 oz/sq ft (allowing 80% efficiency of biplane wings).
Motors are E Max GF 2215/25 950 kV from Robotbirds. These are exceptional value at the moment as they are on a sale price. They are a bit noisy though.
The 40A SCs are also from Robotbirds, their Basic range.
Props are APC-E thin electric 9x6", handed to eliminate torque reactions. Cheating, I know.
The spinners are those little rubber ones from GWS indoor motors. The threaded socket can be eased out to accommodate the prop adaptor thread.
Covering is all generic "silver" and dark blue film supplied by a club-mate. Too shiny. A mist overall with some semi-matt varnish might tone it down a bit.
The white top to the fuselage is not scale: I don’t think this was introduced until later. But it makes a nice contrast with the airframe.
The windows are all cut from Christmas present boxes. But I think on reflection that Ivan’s method of making them from clear film is better, particularly for the flat fuselage windows. I may rip them out and try again.
Markings will be by Tim Calvert of Model Markings
Balsa sheet all 36” long: 3mm 2, 5mm 2, 2.5mm 3, 1.5m x 48” 4
Balsa strip all 36” long: 5mm x 12.5: 4, 5 x 6: 10, 5 x 5: 4, 5 x 3.2: 8, 3.2 sq: 16
Bass strip all 36” long: 6.5 sq: 2, 6.5 x 3.2: 4
To be honest I stopped counting after a while and the nacelles ate up a lot of 1/16th sheet before I settled on the foam option.
Time. I recorded 135 hours building time.
Cost. This is classified information, but if you mentioned £350 I don’t think you would be far out. I do have a fair amount of wood left over.
Aug 29, 2018, 01:31 PM
Father by day, hacker by night
JornWildt's Avatar
Originally Posted by Sopwith Mike
Cost. This is classified information, but if you mentioned £350 I donít think you would be far out. I do have a fair amount of wood left over.
Someone has this tag line on the Danish forum: "My biggest fear is that my wife sells my planes for the price I told her I got them for!"
Aug 29, 2018, 01:41 PM
Low And Slow 3D Pilot
OliverW's Avatar
Congrats on the maiden! Looks great!
Aug 29, 2018, 02:02 PM

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