Design & build of Pencam-class photo platform - Page 4

Karl B² · Jul 29, 2003, 04:42 PM

John,

A video downlink for aiming would work well. It would be nice to have a brow mounted semi-transparent HUD over one eye, though a little LCD tv monitor strapped to the TX is more realistic.

Here's my servo bay. At the left can be seen a cutout for the Pencam USB, and the MiniAC & Phoenix 25 are at right.

Karl

Karl B² · Jul 29, 2003, 04:45 PM

Here is the aft fairing that will go behind the camera. Made with 1/32" sheet, 3/32" stringers, and 1/16" formers.

Karl B² · Jul 29, 2003, 04:46 PM

Fairing with sheeting:

Karl B² · Jul 29, 2003, 04:48 PM

Tabs will hold the front, with a magnet securing the back. Here it is positioned in place.

Karl B² · Jul 29, 2003, 04:50 PM

The boom is clamped by the strap, allowing removal/adjustment.

Karl

Karl B² · Jul 30, 2003, 04:28 PM

All covered:

Karl B² · Jul 30, 2003, 04:32 PM

Here she is with the hatches open. The rake angle on the gear puts the straight landing compression loads in line with the CG, and the strut runs right up to the bottom of the battery platform. The plan was to not repeat that Slowstick LG "dribble" as the gear bounces fore and aft along the ground. The angle and thicker wire (3/32) should accomplish that.

Karl B² · Jul 30, 2003, 04:34 PM

Elevator pylon & control linkages:

Karl B² · Jul 30, 2003, 04:36 PM

Mockup with Slowstick wing.

Karl B² · Jul 30, 2003, 04:37 PM

Are those surfaces too small...

Karl B² · Jul 30, 2003, 04:41 PM

...or is that tailboom too long?

CAD layout for the wing is almost done. The outboard panels will reflect the tail design, so this will be my first tapered wing built from scratch.

Karl

Sparky Paul · Jul 30, 2003, 06:04 PM

The surfaces look OK, but the boom.... looks anoretic!
I've found those things can (will) bend with flight loads at speed. Down.

Karl B² · Jul 30, 2003, 09:04 PM

I just read that about the Wingo. I'll have to see if I get any reversal problems. Could always inject the boom with polyurethane.

Karl

Ironsides · Jul 31, 2003, 07:01 AM

Karl:

You could put fishing line braces from the top and bottom of the fin to the tail boom at the trailing edge of the wing. Those lines would act as a safety to prevent the Wingo tuck.

David

KeithLuneau · Jul 31, 2003, 12:13 PM

That plane is coming along nicely! Looking forward to hearing how it flys, and seing pictures from it!

Keith

Jul 29, 2003, 04:42 PM	#46
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	John, A video downlink for aiming would work well. It would be nice to have a brow mounted semi-transparent HUD over one eye, though a little LCD tv monitor strapped to the TX is more realistic. Here's my servo bay. At the left can be seen a cutout for the Pencam USB, and the MiniAC & Phoenix 25 are at right. Karl Attached Thumbnails 57.8 KB · Views: 311

Jul 29, 2003, 04:45 PM	#47
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Here is the aft fairing that will go behind the camera. Made with 1/32" sheet, 3/32" stringers, and 1/16" formers. Attached Thumbnails 28.3 KB · Views: 307

Jul 29, 2003, 04:46 PM	#48
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Fairing with sheeting: Attached Thumbnails 35.7 KB · Views: 304

Jul 29, 2003, 04:48 PM	#49
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Tabs will hold the front, with a magnet securing the back. Here it is positioned in place. Attached Thumbnails 30.7 KB · Views: 299

Jul 29, 2003, 04:50 PM	#50
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	last one for now The boom is clamped by the strap, allowing removal/adjustment. Karl Attached Thumbnails 23.5 KB · Views: 318

Jul 30, 2003, 04:28 PM	#51
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	All covered: Attached Thumbnails 22.7 KB · Views: 273

Jul 30, 2003, 04:32 PM	#52
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Open For Business Here she is with the hatches open. The rake angle on the gear puts the straight landing compression loads in line with the CG, and the strut runs right up to the bottom of the battery platform. The plan was to not repeat that Slowstick LG "dribble" as the gear bounces fore and aft along the ground. The angle and thicker wire (3/32) should accomplish that. Attached Thumbnails 29.9 KB · Views: 269

Jul 30, 2003, 04:34 PM	#53
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Tail Elevator pylon & control linkages: Attached Thumbnails 22.6 KB · Views: 282

Jul 30, 2003, 04:36 PM	#54
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Mockup with Slowstick wing. Attached Thumbnails 24.4 KB · Views: 256

Jul 30, 2003, 04:37 PM	#55
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	Tricks with Perspective Are those surfaces too small... Attached Thumbnails 28.9 KB · Views: 258

Jul 30, 2003, 04:41 PM	#56
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	last one for now ...or is that tailboom too long? CAD layout for the wing is almost done. The outboard panels will reflect the tail design, so this will be my first tapered wing built from scratch. Karl Attached Thumbnails 22.0 KB · Views: 252

Jul 30, 2003, 06:04 PM	#57
Sparky Paul Ascended Master Join Date: Oct 2000 Location: Palmdale, CA Posts: 10,520	The surfaces look OK, but the boom.... looks anoretic! I've found those things can (will) bend with flight loads at speed. Down.

Jul 30, 2003, 09:04 PM	#58
Karl B² half fast Join Date: Jan 2003 Location: Western Wisconsin, USA Posts: 4,256	I just read that about the Wingo. I'll have to see if I get any reversal problems. Could always inject the boom with polyurethane. Karl

Jul 31, 2003, 07:01 AM	#59
Ironsides Registered User Join Date: Jan 2003 Location: Toronto, Canada Posts: 1,282	Karl: You could put fishing line braces from the top and bottom of the fin to the tail boom at the trailing edge of the wing. Those lines would act as a safety to prevent the Wingo tuck. David

Jul 31, 2003, 12:13 PM	#60
KeithLuneau Live FPV FTW?! ;) Join Date: Jan 2002 Location: Central Louisiana Posts: 2,388	That plane is coming along nicely! Looking forward to hearing how it flys, and seing pictures from it! Keith

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