Scratch build sport scale Widgeon

jwhitacre · Sep 02, 2009, 09:43 PM

Well this one has an interesting history. I've played around with designing the Widgeon a few times when I was a kid and was never satisfied with it. A few years ago while on a 2month business trip I had some free time and took another shot at this thing and IMO finally got something that would look pretty scale and also have good flying characteristics. Once I got home the plans went into storage until the winter to build...that never happened. I had actually forgot about these plans until I dug them up in the plans bin last night while searching for something else

I've been looking them over and even though it's a little large for the pond across the street I might go for it. Now before a single part is cut I want any suggestion/improvements that you guys would think is needed. I've scratched built a few planes before with good success but never a seaplane and don't want to leave anything to chance(which is why I've designed this plane quite a few times and never built it) The WS: 61.5" L: 49.75" I will figure out the WA tomorrow(can't find the sheet with all the specs I wrote out)

jwhitacre · Sep 03, 2009, 07:51 PM

I found the piece of paper with all the important info

Here's the full specs
Note: I left some "grace" in the wing loading in case it went over weight
WA: approx 579in sq
AR: 6.2
WL: 19.9@5lbs, 23.8@6lbs
Airfoils: S8036 at the root, S8037 at the tip E168 for tail surfaces
I'm thinking a pair of OS25's would power it just fine

jwhitacre · Sep 04, 2009, 06:19 PM

I guess nobody has an opinion

I'm going to go ahead and build it over the winter. I'm starting to make up templates from the plans and working on a parts list

vp46 · Sep 06, 2009, 06:47 PM

I have an opinion... and a question!

Can you explain the Incidence angles of the wings relative to the Thrust line or any information you have handy there??... Who's plans are these btw?

Geoffinpdx · Sep 06, 2009, 07:37 PM

There was a Widgeon thread in the Scale Electric forum, and I recently obtained the Widgeon plan that Bill Effinger did back in the 1970s. The defunct Comet models had a Widgeon of somewhat smaller size. http://f1.grp.yahoofs.com/v1/8D6kSg_...%20Widgeon.pdf

vp46 · Sep 06, 2009, 08:07 PM

Are you building one? I think SVX (Dusty?) had built from the Effinger plans correct? I hope those old comet plans are good.

vp46 · Sep 06, 2009, 08:09 PM

I think SVX mentioned he was going with 0-0-0.... I was thinking maybe 0-0+1 (or maybe a compromise and +.05) for the motors.

<edit> I noticed in another thread that the incidence on the Widgeon full scale is +3 +3 +4.5 (for motors).... I think my plan may be on the money IE keeping the Decalage at zero <-- I think that is the correct way to phrase degree of incidence without reference to the Datum? <edit>

prunner · Sep 13, 2009, 01:24 PM

Found these on the web- thought they might help- good luck

Airboatflyingshp · Sep 14, 2009, 05:51 PM

those are in the free plans sticky and I have the colour scan the shaded areas are green If I remember always liked this more than the Goose it would make a nice Ivan P subject for geared S480s like the Sealand. Good luck nice subject.

Geoffinpdx · Sep 14, 2009, 11:39 PM

Some day I'll get around to building my Effinger-designed Widgeon. There's a neat article about a father & son team who rebuilt a pair of full-scale Widgeons in the Scale Electric forum:http://www.rcgroups.com/forums/showt...=969420&page=4 Post # 54.

jwhitacre · Sep 15, 2009, 12:09 AM

Thanks for the great info guys

I will start cutting parts once the flying season is over and it starts getting cold out

rcmodelman · Sep 19, 2009, 12:03 PM

Just added the to my subcrib, list. Hope you keep it up dated. Interested to see how this comes together. I want to build the Goose rather then the Widgon and I have not found any plans yet. So this will give me some insite as to develop some sort of plans for the Goose.

jwhitacre · Sep 19, 2009, 06:11 PM

I will post as I get time to work on it. This is one of our busy seasons at work so I won't have much free time til after Thanksgiving. I would imagine the Goose wouldn't be much different than the Widgeon as far as design. The outline of it is a bit different but I think the framing could be done basically the same.

rcmodelman · Sep 19, 2009, 10:57 PM

jwhitacre,

Did you draw the plans off a 3 line drawing? Is this a removeable wing?

jwhitacre · Sep 20, 2009, 12:18 PM

Quote:

Originally Posted by rcmodelman

jwhitacre,

Did you draw the plans off a 3 line drawing? Is this a removeable wing?

it is based off the 3 view of the fullsize but tweeked a bit for better water handling and yes the wing will be removable.

Sep 02, 2009, 09:43 PM	#1
jwhitacre Registered User Join Date: May 2008 Location: Pittsburgh, PA Posts: 253	Scratch build sport scale Widgeon Well this one has an interesting history. I've played around with designing the Widgeon a few times when I was a kid and was never satisfied with it. A few years ago while on a 2month business trip I had some free time and took another shot at this thing and IMO finally got something that would look pretty scale and also have good flying characteristics. Once I got home the plans went into storage until the winter to build...that never happened. I had actually forgot about these plans until I dug them up in the plans bin last night while searching for something else I've been looking them over and even though it's a little large for the pond across the street I might go for it. Now before a single part is cut I want any suggestion/improvements that you guys would think is needed. I've scratched built a few planes before with good success but never a seaplane and don't want to leave anything to chance(which is why I've designed this plane quite a few times and never built it) The WS: 61.5" L: 49.75" I will figure out the WA tomorrow(can't find the sheet with all the specs I wrote out) Attached Thumbnails 32.8 KB · Views: 83 29.5 KB · Views: 41 32.7 KB · Views: 73 24.7 KB · Views: 42 24.5 KB · Views: 43 26.6 KB · Views: 37 30.8 KB · Views: 44 30.0 KB · Views: 45 25.7 KB · Views: 37 27.6 KB · Views: 37 27.5 KB · Views: 51 Last edited by jwhitacre; Sep 04, 2009 at 06:17 PM.

Sep 03, 2009, 07:51 PM	#2
jwhitacre Registered User Join Date: May 2008 Location: Pittsburgh, PA Posts: 253	I found the piece of paper with all the important info Here's the full specs Note: I left some "grace" in the wing loading in case it went over weight WA: approx 579in sq AR: 6.2 WL: 19.9@5lbs, 23.8@6lbs Airfoils: S8036 at the root, S8037 at the tip E168 for tail surfaces I'm thinking a pair of OS25's would power it just fine Last edited by jwhitacre; Sep 03, 2009 at 09:11 PM.

Sep 06, 2009, 08:09 PM	#7
vp46 Registered User Join Date: Jan 2008 Location: Santa Clara, CA Posts: 712	I think SVX mentioned he was going with 0-0-0.... I was thinking maybe 0-0+1 (or maybe a compromise and +.05) for the motors. <edit> I noticed in another thread that the incidence on the Widgeon full scale is +3 +3 +4.5 (for motors).... I think my plan may be on the money IE keeping the Decalage at zero <-- I think that is the correct way to phrase degree of incidence without reference to the Datum? <edit> Last edited by vp46; Sep 08, 2009 at 01:52 AM.

Sep 13, 2009, 01:24 PM	#8
prunner Prunner Join Date: Oct 2008 Location: Auburn, KS Posts: 268	Found these on the web- thought they might help- good luck Attached Thumbnails 91.0 KB · Views: 60 78.5 KB · Views: 68

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Sep 04, 2009, 06:19 PM	#3
jwhitacre Registered User Join Date: May 2008 Location: Pittsburgh, PA Posts: 253	I guess nobody has an opinion I'm going to go ahead and build it over the winter. I'm starting to make up templates from the plans and working on a parts list

Sep 06, 2009, 06:47 PM	#4
vp46 Registered User Join Date: Jan 2008 Location: Santa Clara, CA Posts: 712	I have an opinion... and a question! Can you explain the Incidence angles of the wings relative to the Thrust line or any information you have handy there??... Who's plans are these btw?

Sep 06, 2009, 07:37 PM	#5
Geoffinpdx Two left thumbs Join Date: Sep 2006 Location: Portland, Oregon Posts: 2,457	There was a Widgeon thread in the Scale Electric forum, and I recently obtained the Widgeon plan that Bill Effinger did back in the 1970s. The defunct Comet models had a Widgeon of somewhat smaller size. http://f1.grp.yahoofs.com/v1/8D6kSg_...%20Widgeon.pdf

Sep 06, 2009, 08:07 PM	#6
vp46 Registered User Join Date: Jan 2008 Location: Santa Clara, CA Posts: 712	Are you building one? I think SVX (Dusty?) had built from the Effinger plans correct? I hope those old comet plans are good.

Sep 14, 2009, 05:51 PM	#9
Airboatflyingshp Registered User Join Date: Oct 2005 Location: B'ham UK Posts: 2,979	those are in the free plans sticky and I have the colour scan the shaded areas are green If I remember always liked this more than the Goose it would make a nice Ivan P subject for geared S480s like the Sealand. Good luck nice subject.

Sep 14, 2009, 11:39 PM	#10
Geoffinpdx Two left thumbs Join Date: Sep 2006 Location: Portland, Oregon Posts: 2,457	Some day I'll get around to building my Effinger-designed Widgeon. There's a neat article about a father & son team who rebuilt a pair of full-scale Widgeons in the Scale Electric forum:http://www.rcgroups.com/forums/showt...=969420&page=4 Post # 54.

Sep 15, 2009, 12:09 AM	#11
jwhitacre Registered User Join Date: May 2008 Location: Pittsburgh, PA Posts: 253	Thanks for the great info guys I will start cutting parts once the flying season is over and it starts getting cold out

Sep 19, 2009, 12:03 PM	#12
rcmodelman Registered User Join Date: Jun 2008 Location: Sunshine Coast Posts: 37	Just added the to my subcrib, list. Hope you keep it up dated. Interested to see how this comes together. I want to build the Goose rather then the Widgon and I have not found any plans yet. So this will give me some insite as to develop some sort of plans for the Goose.

Sep 19, 2009, 06:11 PM	#13
jwhitacre Registered User Join Date: May 2008 Location: Pittsburgh, PA Posts: 253	I will post as I get time to work on it. This is one of our busy seasons at work so I won't have much free time til after Thanksgiving. I would imagine the Goose wouldn't be much different than the Widgeon as far as design. The outline of it is a bit different but I think the framing could be done basically the same.

Sep 19, 2009, 10:57 PM	#14
rcmodelman Registered User Join Date: Jun 2008 Location: Sunshine Coast Posts: 37	jwhitacre, Did you draw the plans off a 3 line drawing? Is this a removeable wing?