Radius for the G. Benroy

...ask your questions in the appropriate forums BUT document your build here...preferably in a single thread...dates for updates, are appreciated....

Radius for the G. Benroy

Postby Boanerges4 » Sat Mar 26, 2011 9:05 am

I have the generic benroy plans, and I have a ??? Im not quite sure about the radius figures on page 17 of the plans. I built my home and I have a daughter with a masters in math. but we cant figure this out. The front upper curve is a 19 radius, meaning to measure down and across 19 inches giving you your radius. Now to the hatch end,it says a 48 inch radius but they only measure across 41 9/16 so how can this be? I hope its just an oversight on my part, I would appreciate any help. Thanks :? :roll: :roll:
Boanerges4
Teardrop Advisor
 
Posts: 73
Joined: Fri Mar 26, 2010 10:34 pm

Postby mikeschn » Sat Mar 26, 2011 9:20 am

If the 48" radius was tangent to the Top AND the Back, then the 41 9/16" dimension would be 48".


Image


But it's not tangent to the back, hence the 41 9/16" dimension (same as 41.5625")
Image

I did put a nice little 19" radius to smooth out the corner!!!
Image

Mike...
Last edited by mikeschn on Sat Mar 26, 2011 10:06 am, edited 2 times in total.
The quality is remembered long after the price is forgotten, so build your teardrop with the best materials...
User avatar
mikeschn
Site Admin
 
Posts: 18961
Images: 462
Joined: Tue Apr 13, 2004 11:01 am
Location: MI

Postby parnold » Sat Mar 26, 2011 9:26 am

I don't know the technical jargon, but the back radius is not equal on the corner. If you moved the mark up 48" instead of the 41 9/16 as is recommended, you would not have the rear "flat" section, the entire back would be one big rounded piece.
User avatar
parnold
Donating Member
 
Posts: 2342
Images: 302
Joined: Mon Feb 08, 2010 4:49 pm
Location: Northwest New Jersey
Top

Postby parnold » Sat Mar 26, 2011 9:26 am

Ha... Mike beat me with the technical jargon!
User avatar
parnold
Donating Member
 
Posts: 2342
Images: 302
Joined: Mon Feb 08, 2010 4:49 pm
Location: Northwest New Jersey
Top

Radius

Postby Boanerges4 » Sat Mar 26, 2011 9:32 am

Thanks guys, I need all the help I can get. Mike ,your over my head when you start the tangent jargon. Im from south Ga. My pie are round. :lol:
Boanerges4
Teardrop Advisor
 
Posts: 73
Joined: Fri Mar 26, 2010 10:34 pm
Top

Postby Miriam C. » Sat Mar 26, 2011 9:53 am

Image

So people don't have to go back and look up the page! :thumbsup: And made it a sticky! ;)
“Forgiveness means giving up all hope for a better past.â€
User avatar
Miriam C.
our Aunti M
 
Posts: 19673
Images: 149
Joined: Wed Feb 15, 2006 3:14 pm
Location: Southwest MO
Top

Re: Radius

Postby millstone » Sat Jul 09, 2011 9:16 pm

Boanerges4 wrote:Thanks guys, I need all the help I can get. Mike ,your over my head when you start the tangent jargon. Im from south Ga. My pie are round. :lol:



'At's Right:

Pie R Round
CORNBREAD R Square.

8)
User avatar
millstone
Silver Donating Member
 
Posts: 74
Images: 0
Joined: Tue Jul 05, 2011 3:53 pm
Location: Georgia
Top

Re: Radius for the G. Benroy

Postby seattlejack » Thu Mar 01, 2012 7:46 pm

I shortened the rear top radius to 47" so my router jig would sit ON the side rather than 1/2 off.
I retained the 41.563" dimension but rounded it off to 41.0" .
88427
The dowel in the center of the 2x2 was at the junction of the 47" and 41.5" when the arc was cut.
User avatar
seattlejack
Teardrop Inspector
 
Posts: 8
Images: 22
Joined: Mon Sep 29, 2008 11:43 am
Location: Seattle
Top

Re: Radius for the G. Benroy

Postby mikeschn » Thu Mar 01, 2012 7:51 pm

Sounds close enough to me...

Give us a picture of your sidewall standing up when you get a chance!

Mike...
The quality is remembered long after the price is forgotten, so build your teardrop with the best materials...
User avatar
mikeschn
Site Admin
 
Posts: 18961
Images: 462
Joined: Tue Apr 13, 2004 11:01 am
Location: MI
Top

Re: Radius for the G. Benroy

Postby Rick G » Fri Apr 06, 2012 9:21 pm

All that math gave me a headache , I grabbed a used 19 inch motorcycle tire and used it as a template to layout the radius for the corners. :)
Rick G
Teardrop Inspector
 
Posts: 20
Joined: Sat Feb 12, 2011 12:06 am
Location: north western AZ.
Top

Re: Radius for the G. Benroy

Postby KCStudly » Sat Apr 07, 2012 12:05 am

Back when I was working on submarines, a machinist boss came to me with a couple of his workers in tow and was trying to calculate the area of a circle. He refused to accept that the area of a circle is Pi x radius^2 (pi r squared), instead thinking that it was Pi x diameter. I was gentle with him, being younger at the time and not wanting to embarrass him in front of his guys (who were clueless to the math). Later he came around to my way of thinking and from that day on all of the machinist on the site started calling me by my new nick name "Piard" (from Pie-are-d).

Of course every one knows pie are round.
KC
My Build: The Poet Creek Express Hybrid Foamie

Poet Creek Or Bust
Engineering the TLAR way - "That Looks About Right"
TnTTT ORIGINAL 200A LANTERN CLUB = "The 200A Gang"
Green Lantern Corpsmen
User avatar
KCStudly
Donating Member
 
Posts: 8577
Images: 8035
Joined: Mon Feb 06, 2012 10:18 pm
Location: Southeastern CT, USA
Top

Re: Radius for the G. Benroy

Postby Rhino Ray » Fri Aug 03, 2012 7:21 pm

I simply went to Grant at Lilbear http://www.lilbear.teardrops.net/parts.html and he traced it out on the plywood for me. He also does templates. Give him a call. 8)
The eleventh commandment: Ye that snoozeth loozeth. Selling real estate in ALL of Jefferson State (Northern California and Southern Oregon)

Image Image

My Build http://www.tnttt.com/viewtopic.php?f=21&t=49746
User avatar
Rhino Ray
Silver Donating Member
 
Posts: 337
Images: 55
Joined: Sun Aug 28, 2011 6:02 pm
Location: Roseburg, OR
Top

Re: Radius for the G. Benroy

Postby markhusbands » Wed Apr 17, 2013 7:03 am

I really liked the Benroy radius but I imagined having to repeat that radius with a router multiple times and sort of chickened out and just did a three foot radius in the back and an 18 inch radius in the front. Looks simple but not unpleasing to my eye. The Benroy actually gives you MORE vertical height on the back hatch before the radius begins.
133923
User avatar
markhusbands
Teardrop Master
 
Posts: 285
Images: 58
Joined: Tue Jul 03, 2012 3:17 pm
Location: Denver, Colorado, USA
Top

Re: Radius for the G. Benroy

Postby Oldragbaggers » Wed Apr 17, 2013 8:54 am

Just as an "aside" (not addressing the technical part of your question) I had cut my pattern out with the 19" radius, and to my eye it seemed a little too severe a curve, so I recut it with a 24" radius and really love the lines of it now.
Life is sooooo good.........
Sail...camp....bike...repeat
Becky

Build Journal http://www.tnttt.com/viewtopic.php?f=50&t=45917
Visit our blog at http://www.oldragbaggers.com
Image Image
User avatar
Oldragbaggers
Gold Donating Member
 
Posts: 1842
Images: 331
Joined: Mon Aug 01, 2011 9:22 pm
Location: Essex, MD
Top

Re: Radius for the G. Benroy

Postby Tommy2tone_1999 » Mon Feb 03, 2014 9:26 am

I'm all about simplifying things. For me, more radii mean more margin of error. I simply used a 36" radius that was 12" from the base. Simple.
Image
Make time for fitness and it'll make time for you.
http://TommyDoran.com
http://tommydoran.com/favor
Interview: http://goo.gl/Non1oR
Build Journal - http://www.tnttt.com/viewtopic.php?f=50&t=58395
Come find me on Facebook - http://www.facebook.com/tommy.doran
Image
Image
User avatar
Tommy2tone_1999
Teardrop Master
 
Posts: 230
Images: 149
Joined: Tue Oct 21, 2008 10:54 am
Location: Baton Rouge, LA
Top

Next

Return to Build Journals

Who is online

Users browsing this forum: haynesc78, noseoil and 3 guests