LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently Wed Jul 30, 2014 1:11 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 18 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Thu Oct 03, 2013 7:23 am 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
Critique my Reverse Trike design please ...

I have discovered Sketchup last week and went to town last night in a 6 hour marathon and made this design.

Attachment:
RT0.jpg
RT0.jpg [ 9.63 KiB | Viewed 848 times ]

Attachment:
RT1.jpg
RT1.jpg [ 19.98 KiB | Viewed 848 times ]

Attachment:
RT9.jpg
RT9.jpg [ 12.11 KiB | Viewed 847 times ]

Attachment:
RT2.jpg
RT2.jpg [ 7.89 KiB | Viewed 848 times ]

Attachment:
RT3.jpg
RT3.jpg [ 9.37 KiB | Viewed 848 times ]

Attachment:
RT5.jpg
RT5.jpg [ 8.96 KiB | Viewed 848 times ]

Attachment:
RT6.jpg
RT6.jpg [ 9.11 KiB | Viewed 848 times ]

Attachment:
RT7.jpg
RT7.jpg [ 7.74 KiB | Viewed 848 times ]

Attachment:
RT8.jpg
RT8.jpg [ 10.18 KiB | Viewed 848 times ]


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 9:52 am 
Offline
Automotive Encyclopedia
User avatar

Joined: Fri Dec 22, 2006 2:05 pm
Posts: 4633
About as clean as it can get for an open car without a turtle deck and all flat panels (except for front fender lips) with as short a wheelbase as possible. Appears to be geo metro or similar tiny fwd transverse engine based. Not as aero as using the metro front clip with the aero headlamps.

With some compound curves to the nose, stretched out layed back seating and a longer wheelbase, and 2 inch radius on the rear edges of the front fenders, it could be much more aero but it looks pretty good practical shape to me.


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 10:16 am 
Offline
User avatar

Joined: Mon Apr 12, 2010 5:40 pm
Posts: 1819
Location: san francisco bay area
On occasion I've wondered what using 55 gallon drums to make a waterfall nose would look like, not too bad.
I'd reduce the number of (to one on each side) and enlarge/oval the ducting under the center headlamp myself.
That way they'd look more like a pair of nostrils :mrgreen:

_________________
"There are times when a broken tool is better than a sound one, or a twisted personality more useful than a whole one.
For instance, a whole beer bottle isn't half the weapon that half a beer bottle is ..." Randall Garrett


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 11:28 am 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
Miatav8,MstrASE,A&P,F wrote:
Appears to be geo metro or similar tiny fwd transverse engine based.


Well spotted, I might have a source of free (up front, pay later) 40hp 3 cylinder Suzuki Alto 800cc drivetrain assemblies (complete wheel to wheel) and wondering what I might be able to do with them and this route seems a reasonable choice.

The Alto 800cc engine (F8B) is considerably smaller and lighter than it's bigger G10 brother as it's actually a bored and stroked 550cc (F5B).


oldejack wrote:
I'd reduce the number of (to one on each side) and enlarge/oval the ducting under the center headlamp myself.


The number of what, headlights? Vents?

You mean give it more of a facial character?

Thanks for the comments.

PS: The tray on the tail I thought would have a leather suitcase sitting in it for a "retro" look.


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 1:58 pm 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
Ok so I changed the front and finished filleting the sides in to break up the slab sides a bit, could add some vents behind the front wheels to style it a bit more as well ...

Attachment:
2RT0.jpg
2RT0.jpg [ 13.29 KiB | Viewed 805 times ]

Attachment:
2RT1.jpg
2RT1.jpg [ 20.61 KiB | Viewed 805 times ]

Attachment:
2RT2.jpg
2RT2.jpg [ 16.59 KiB | Viewed 805 times ]

Attachment:
2RT3.jpg
2RT3.jpg [ 9.05 KiB | Viewed 805 times ]


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 2:31 pm 
Offline
Automotive Encyclopedia
User avatar

Joined: Fri Dec 22, 2006 2:05 pm
Posts: 4633
Sounds like the perfect powertrain. One little grill opening diverging to the zuki rad should be plenty of airflow for 40 wild stalions.

Their final gearing may not be best for extended 75 mph speed. Any options or it is what it is?


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 4:38 pm 
Offline
User avatar

Joined: Mon Apr 12, 2010 5:40 pm
Posts: 1819
Location: san francisco bay area
That appeals to me a lot more, I especially like the scalloping on the side.
I think I'd like the front ducts to be a bit lower though. OK,Ok I know sheeeeesh what a nitpicker.

_________________
"There are times when a broken tool is better than a sound one, or a twisted personality more useful than a whole one.
For instance, a whole beer bottle isn't half the weapon that half a beer bottle is ..." Randall Garrett


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 5:33 pm 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
Miatav8,MstrASE,A&P,F wrote:

Their final gearing may not be best for extended 75 mph speed. Any options or it is what it is?


They run 145/70/12" standard (20"/62") and with the weight decrease should be able to pull extra gearing that say a 205/50/15" (23"/72") would offer (62/72 = 0.86 reduction).


oldejack wrote:
That appeals to me a lot more, I especially like the scalloping on the side.
I think I'd like the front ducts to be a bit lower though. OK,Ok I know sheeeeesh what a nitpicker.


I'll extrude a front bumper and stick it on with driving lights tomorrow and see how that looks.


Top
 Profile  
 
PostPosted: Thu Oct 03, 2013 6:57 pm 
Offline
User avatar

Joined: Sat Apr 26, 2008 6:06 pm
Posts: 2129
Location: Under the weather. (Seattle)
Maybe try making the cylindrical forward fender sections slightly conical? Alternatively maybe even slightly non-cylindrical and also tapering towards the tire slightly? In other words, the top fender surface could still be totally horizontal if you prefer, while the forward facing fender surface would have a rearward taper.

_________________
-Justin

Also follow my build on blogspot, tumblr, or instagram and twitter (GarageOdyssey)


Top
 Profile  
 
PostPosted: Fri Oct 04, 2013 4:10 am 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
There you go, front bumper makes a world of difference and I made some dimensional changes and shifting some stuff around based on some real world measurements ....


Attachments:
2FRT1.jpg
2FRT1.jpg [ 17.58 KiB | Viewed 738 times ]
2FRT2.jpg
2FRT2.jpg [ 18.42 KiB | Viewed 738 times ]
2FRT3.jpg
2FRT3.jpg [ 18.57 KiB | Viewed 738 times ]
Top
 Profile  
 
PostPosted: Fri Oct 04, 2013 7:02 am 
Offline
Automotive Encyclopedia
User avatar

Joined: Fri Dec 22, 2006 2:05 pm
Posts: 4633
Rear tire and airflow will actually throw dirt, rocks, mud, etc forward over the car so be sure to add a rear fender painted flat black to hide or extend the upper panelling beyond the tire. You could put the rear lights between the upper and the tire if you extend the panel back far enough and have a fender to protect them.

Depending on how much lighter the trike is than the donor, you may want to use your own adapter axles to accept heavier duty hubs, bearings, and brakes for cornering, heavier wheel and tire, and to cope with the reduced brake leverage of the larger tire od.


Top
 Profile  
 
PostPosted: Sat Oct 05, 2013 11:48 am 
Offline
Automotive Encyclopedia
User avatar

Joined: Fri Dec 22, 2006 2:05 pm
Posts: 4633
On second thought, The zuki donor uprights and spindles will likely be fine and be more efficient for it. No need to make this more complicated than necessary.


Top
 Profile  
 
PostPosted: Sat Oct 05, 2013 8:26 pm 
Offline
User avatar

Joined: Sat Apr 26, 2008 6:06 pm
Posts: 2129
Location: Under the weather. (Seattle)
The 'bumper' does make a surprisingly big difference. Looks good.

_________________
-Justin

Also follow my build on blogspot, tumblr, or instagram and twitter (GarageOdyssey)


Top
 Profile  
 
PostPosted: Mon Oct 07, 2013 5:56 am 
Offline
User avatar

Joined: Wed Nov 12, 2008 6:29 am
Posts: 3314
Driven5 wrote:
The 'bumper' does make a surprisingly big difference. Looks good.


Best part is that it, like the rest of the car, is made entirely from flat sheetmetal panels (if no one noticed).

Thanks for the input.


Top
 Profile  
 
PostPosted: Mon Oct 07, 2013 12:12 pm 
Offline
User avatar

Joined: Sat Apr 26, 2008 6:06 pm
Posts: 2129
Location: Under the weather. (Seattle)
Yep, that's why my thoughts for slight reshaping of the fenders still relied on the same idea too. It definitely simplifies things while still being able to create some surprisingly interesting shapes...As seen above.

_________________
-Justin

Also follow my build on blogspot, tumblr, or instagram and twitter (GarageOdyssey)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY