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Learning how to build Lotus Seven replicas...together!
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PostPosted: June 6, 2019, 11:05 am 
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Joined: November 26, 2012, 2:29 pm
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Location: Sioux Falls, SD
Just like the title says. Has anyone made a removable hardtop with a functional hatch?

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PostPosted: June 6, 2019, 12:24 pm 
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Joined: July 17, 2008, 9:11 am
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Location: West Chicago,IL
Functional hatch? Please explain further.

I built a hardtop that hinges at the roll bar. It was easily removed with 2 bolts if desired.



Bill, (Tailwind) also built a hardtop. I can't remember if it hinges or not.

Then there is Gayle (veightseven) who built a full bodied Stalker.

I can't remember who right now, built a hardtop using a golf cart top.

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PostPosted: June 7, 2019, 10:27 pm 
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I mean functional like a hatch from a stock vehicle. Like a normal opening hatchback

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PostPosted: June 8, 2019, 10:33 am 
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I'm not aware of anyone. Perhaps you might look at Donkervoort for inspiration? lead the way. Others may follow.

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PostPosted: June 8, 2019, 1:33 pm 
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Gilbert "Mac" Macintosh, an early Lotus design engineer, came up with this lovely one for his Lotus 11 street car. See details at...

http://www.lotuseleven.org/DarkAges1/MacIntosh.htm

...from whence I lifted this photo. It's an interesting read.

For a typical Locost (or anything else with a roll bar) the attachment of the back of the roof to the chassis would have to be moved back a tad, but I think the concept is terrific.


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Mac2.jpg
Mac2.jpg [ 8.62 KiB | Viewed 1516 times ]

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PostPosted: June 9, 2019, 9:52 am 
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Joined: November 26, 2012, 2:29 pm
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Location: Sioux Falls, SD
rx7locost wrote:
I'm not aware of anyone. Perhaps you might look at Donkervoort for inspiration? lead the way. Others may follow.


I'm actually making a Donkervoort-esque locost actually. Designed my own frame based off it's dimensions actually.

Looking at a Donkervoort is actually why I thought of it. I've been thinking that if I do this I'll probably use Miata hardtop hatches on the inside. I'm just unsure about how I'll go about sealing the windows. I need to take a look at how Miata hardtops accomplish this.

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PostPosted: August 12, 2019, 4:34 pm 
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Joined: December 25, 2012, 11:09 am
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Location: Joplin
Tilting the entire top back is a good idea but we had already built the trunk and that made it difficult to use. Thought about building a pop up hatch hinged at the top roll bar to cover the boot on the new car.
Might work....easy access to the boot.
Gale
Attachment:
File comment: The next one will incorporate the windows, into the door like Donkervoort, heavy SS piano hinged from the A post roll bar.
Water sealing is a bit more complex to do with the piano hinge.
Gale

687571F8-37F2-4A31-811A-D6A1CF2EF04F.jpeg
687571F8-37F2-4A31-811A-D6A1CF2EF04F.jpeg [ 130.35 KiB | Viewed 595 times ]

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PostPosted: August 12, 2019, 7:58 pm 
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Location: White Rock, BC, Canada
Could you just hinge/latch the rear window to get what you need? Probably easiest.

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PostPosted: August 15, 2019, 10:50 am 
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C10CoryM
Latched hatch glass was fairly easy to incorporate into the hard top and has worked well.


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1406A7CF-B721-44B9-8720-ACF73A02B7B6.jpeg
1406A7CF-B721-44B9-8720-ACF73A02B7B6.jpeg [ 75.3 KiB | Viewed 453 times ]

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PostPosted: August 29, 2019, 4:15 pm 
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Joined: March 18, 2008, 10:25 pm
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Location: Wasilla, AK
Seeing as i live in Alaska i was planning a hard top and was thinking gull wing doors are the answer. Something like the one above.


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PostPosted: August 30, 2019, 8:48 am 
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Joined: September 22, 2005, 8:12 am
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If you are going with a hard top, then you will want to add a "LOT OF SOUND DAMPING MATERIAL" !!!!I have foam in the tunnel and sides and carpet on the floor but just with a soft top and doors it sounds like you are riding in a tin can full of loose ball bearing, when the cabin is closed up :ack: Davew


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PostPosted: August 31, 2019, 3:05 pm 
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Joined: December 25, 2012, 11:09 am
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Location: Joplin
Davew
You are right. Flat Aluminum riveted to a steel frame is basically a drum head. With out sound deadening obviously the result will be unacceptable to most...top or no top. The top will amplify the tin can racket inside the car. After riding in one without sound deadening we decided to put it on every panel. The result was great but added weight, so not the best Idea for Race car.
Gale


Attachments:
File comment: This rolled on material changes the sound from a tin can to a dull thud when tapped.
Don’t plan on removing it once it’s on!

1520583B-4C7A-4B35-BD6F-8D606902DA5F.jpeg
1520583B-4C7A-4B35-BD6F-8D606902DA5F.jpeg [ 150.28 KiB | Viewed 96 times ]

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