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....

Re: Radius for the G. Benroy

Postby Tommy2tone_1999 » Sun May 11, 2014 1:53 pm

In building my teardrop, I probably should have made the front curve a 24" radius. 18" is almost too tight to bend most wood for the inside radius.
Last edited by Tommy2tone_1999 on Wed Dec 10, 2014 4:52 pm, edited 1 time in total.
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

Re: Radius for the G. Benroy

Postby KCStudly » Sun May 11, 2014 8:52 pm

My front radius is 13-1/2 inches and although I have not tried to bend a full width panel yet, I was able to bend a 6 inch wide strip of 5 mm ply (grain running the easy way) with out any trouble. 5mm is 3/16 inch thick.
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: 8656
Images: 8039
Joined: Mon Feb 06, 2012 10:18 pm
Location: Southeastern CT, USA

Re: Radius for the G. Benroy

Postby Tommy2tone_1999 » Mon May 12, 2014 11:55 am

I managed to bend 1/8" luan around the curve but it was iffy for a minute there
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

Re: Radius for the G. Benroy

Postby dales133 » Sat Jan 03, 2015 9:56 pm

thought id post this here as its got what i should have ended up with previously!
the radius ive used 1200mm witch is close to the 48 inches.
what i think ive done but haven't really sussed it out yet is i made the 48 tangent to the top and imaginary back before i added on the xtra ply witch was giving me issues with the smaller 19 inch radius.
i havnt belt sanded it yet is just a rough cut but does this look alright to you?
my only other real option is to buy another sheet and add it on from where the galley starts so i can remark it correctliy , or shorten the back a few inches maybe.
because its so tall im wondering if it isnt ok as it is as there will be around the same virtical lenth as standard with the underfloor.
please give me your thoughts

Image

Image

i went with the inner most verticle line as it seemed to give me cleaner lines and accomodate the 19 inch radius better.
User avatar
dales133
4000 Club
4000 Club
 
Posts: 4445
Images: 1
Joined: Mon Oct 13, 2014 5:26 pm
Top

Re: Radius for the G. Benroy

Postby KCStudly » Sat Jan 03, 2015 10:21 pm

I don't understand the question. Do you have a sketch of the profile with the dimensions that you are trying to duplicate?

1200 mm is about 47.25 inch.

Is your ply metric in width (height)? If so what is the dimension? And what metric dimension do you plan to use in place of the 19 inch radius (about 483 mm... 482.6)

So you want the large top radius to be tangent with the top and rear, and the small bottom radius to be tangent with the rear and bottom? Any straight vertical in between, or do you want the two radii to be roll together continuously (depending on the height of the sheet)?
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: 8656
Images: 8039
Joined: Mon Feb 06, 2012 10:18 pm
Location: Southeastern CT, USA
Top

Re: Radius for the G. Benroy

Postby dales133 » Sat Jan 03, 2015 10:26 pm

Hiya kc.
If you go to the first example on this thread it is what I have done instead of the second example.
You'll see what I mean when you look at those.
And I just rough cut my only option due to this mistake it's in the picture below.
What I'm realy looking for is does it look "right" to you guys
User avatar
dales133
4000 Club
4000 Club
 
Posts: 4445
Images: 1
Joined: Mon Oct 13, 2014 5:26 pm
Top

Re: Radius for the G. Benroy

Postby dales133 » Sat Jan 03, 2015 10:27 pm

And its imperial sheet size 2440 x 1220 in metric
User avatar
dales133
4000 Club
4000 Club
 
Posts: 4445
Images: 1
Joined: Mon Oct 13, 2014 5:26 pm
Top

Re: Radius for the G. Benroy

Postby Rick G » Sat Jan 03, 2015 10:34 pm

it looks OK to me , it should work fine!
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 dales133 » Sat Jan 03, 2015 10:36 pm

Thanks Rick I was kinda iffy on it...possibly the curve was to long
User avatar
dales133
4000 Club
4000 Club
 
Posts: 4445
Images: 1
Joined: Mon Oct 13, 2014 5:26 pm
Top

Re: Radius for the G. Benroy

Postby KCStudly » Sat Jan 03, 2015 10:38 pm

The only thing that matters is if it looks right to you. :D :thumbsup:

Looks fine to me. :thumbsup:
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: 8656
Images: 8039
Joined: Mon Feb 06, 2012 10:18 pm
Location: Southeastern CT, USA
Top

Re: Radius for the G. Benroy

Postby Sheddie » Sat Jan 03, 2015 11:54 pm

KCStudly wrote:The only thing that matters is if it looks right to you. :D :thumbsup:

Looks fine to me. :thumbsup:

As he said, looks good to me too :thumbsup:
User avatar
Sheddie
1000 Club
1000 Club
 
Posts: 1391
Images: 991
Joined: Mon Jul 01, 2013 3:26 pm
Location: Whangarei, New Zealand
Top

Re: Radius for the G. Benroy

Postby dales133 » Sun Jan 04, 2015 3:06 am

Thanks guys.
Wasn't sure myself I just wanted some feedback as I was going to scrap it this time a week ago.
User avatar
dales133
4000 Club
4000 Club
 
Posts: 4445
Images: 1
Joined: Mon Oct 13, 2014 5:26 pm
Top

Re: Radius for the G. Benroy

Postby DougN » Thu Apr 02, 2015 1:31 pm

seattlejack wrote: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.


I love this jig! Was starting to work out how I was going to use my router to do the cut, but your picture is a thousand words!

Thanks,
Doug
DougN
Teardrop Inspector
 
Posts: 22
Images: 26
Joined: Mon Mar 02, 2015 6:18 pm
Top

Re: Radius for the G. Benroy

Postby ChasCABQ » Sat May 09, 2015 1:52 pm

I cut my sidewalls with 20" radius in the front and 36" radius in the back. They were easy to layout with string. I used Sketchup to compare various Benroy sidewall radii and checked other designers profiles. I even looked at 1/4 ellipses of various sizes but was worried about ease of accurate layout.
Screen Shot 2015-05-04 at 5.32.56 PM.png.jpg
Modified Benroy profile
Screen Shot 2015-05-04 at 5.32.56 PM.png.jpg (73.43 KiB) Viewed 5812 times
Build journal: http://www.tnttt.com/viewtopic.php?t=61303
In 2016, I finally received a kidney transplant, finished my teardrop, and took it on the road!
User avatar
ChasCABQ
Donating Member
 
Posts: 94
Images: 18
Joined: Sat Sep 27, 2014 3:54 pm
Location: Albuquerque, NM
Top

Re: Radius for the G. Benroy

Postby jsparrish26 » Tue Nov 24, 2015 2:21 pm

KCStudly wrote: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.


8th grade math, one of the things I rarely use, but will NEVER forget. Our teacher taught us that "Pie r squared, Cornbread r round."
jsparrish26
Teardrop Inspector
 
Posts: 6
Images: 1
Joined: Thu Mar 19, 2015 3:43 pm
Top

Previous

Return to Build Journals

Who is online

Users browsing this forum: Bing [Bot], Denis_kh, friz, kstier and 4 guests