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Author Topic: New Electric Project  (Read 6638 times)

Offline Steve Fitton

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Re: New Electric Project
« Reply #50 on: June 07, 2011, 08:19:32 AM »
....  I sanded the model down to bare balsa and

applied a very light coat of white as a base, and misted a one coat of u  2 part urethane...


How did you get the glass sanded off? I would be terrified of sanding through the glass and merrily sanding straight through the 1/32 balsa shell before I realized it.  Did you have to put something like silkspan back over the bare wood, or did the fibreglass resin leave the balsa filled ok?
Steve

Offline PerttiMe

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Re: New Electric Project
« Reply #51 on: June 07, 2011, 09:38:55 AM »
Meanwhile in Switzerland.. :) L
So that is your #12... A while ago I saw pictures of your #13 at a contest. The finish on #13 does not look as elaborate as some of your other aircraft.
I built a Blue Pants as a kid. Wish I still had it. Might even learn to fly it.

Offline Lauri Malila

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Re: New Electric Project
« Reply #52 on: June 07, 2011, 01:31:53 PM »


 Yes, the #12 had new wings and paint last winter. I haven't flown it much after the restauration, I think I will replace the .60 with the .76 before flying it again. But it should be a good plane.
 #13 is also old, with about 2000 flights. And it looks quite worn out. It was an experiment wit water based paint and I'm not so happy with the paintwork. I'm planning to re-paint it, but I think I much rather have a new plane in near future. L

Offline Will Moore

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Re: New Electric Project
« Reply #53 on: June 16, 2011, 08:28:48 PM »
Here is a comparison between the two power systems I have been experimenting with.  The Orbit 20-18 seems to have plenty of
power for this airframe.  And I have saved 4.3 ounces (124 grams)

Electrical Components                                                   Weight in ounces         Weight in grams

Thunder Power 3300mAh 5 cell Pro Lite V-2   20C                  13.8                            393
Plettenberg Orbit 25-14                                                        9.7                            274
                                                                                        _____                         ____
                                                             Total  weight         23.5                            667


Thunder Power 2700mAh 5 cell G6 Pro Lite   25C                   10.8                            306
Pettenberg Orbit 20-18                                                         8.4                            237
                                                                                       _____                         _____
                                                            Total Weight          19.2                            543


                                                        Weight savings           4.3 ounces                 124 grams


I'm using an APC pusher 13" 6.5 pitch prop, with level lap speeds of 5.2 to 5.4 seconds, on 64 foot eye to eye .018 lines
My flight time is 5min 45 sec.,  rpm around 9300,  and power consumption is about 1900mAh out of the battery.

So I've saved an additional 4.3 ounces.  Very happy with the model.  It flies extraordinarily well.
Corners are so crisp that my brain has a hard time filling in the images of the turn between horizontal and vertical.
( yeah, I know, its my brain, not the airplane)



            
Things take longer to happen than you think they will,

Then they happen much faster than you thought they could.
 AMA # 209


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