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Author Topic: Nissan Micra  (Read 4113 times)
Thunderace
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Lemon Subaru


« Reply #105 on: June 19, 2018, 11:37:05 AM »

I will come over the bridge as soon as I can.


Kettle is already on Doug !   trike.gif trike.gif


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Plasticpig
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« Reply #106 on: June 20, 2018, 08:50:50 AM »

Its a very long story, but I was given the frame in the pic below.



I was going to tack the Micra lumpt to it, but to be honest it is very thick wall tube. I think the Audi rear end will suit it better, and the big wheels and tyres I have are also 4x108mm pcd.
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Thunderace
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Lemon Subaru


« Reply #107 on: June 20, 2018, 10:39:33 AM »

I think the Audi rear end will suit it better


Not sure what difference that will make Doug,
I tend to come at the problem as being a nominal wheel base,
so while bits of engine which stick up in the way effect things a little,
generally the engine/trans unit is just what makes it go,
and very similar trikes can be made from various power units,
since they all fit under similar bonnet space,
and usually have plenty of places to bolt extra brackets.
Though depending on what we want to build some power plants are easier to work with than others.

So I think that comes down to the age old lack of plan thing,
ie what we want to build ?

Once that bit is decided, bending up a few tubes to give a chassis of the right length,
and seat height is relatively quick and easy.

This may not be the best answer (regarding your picture),
I will look at the picture again later.
 trike.gif trike.gif 
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Plasticpig
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« Reply #108 on: June 20, 2018, 12:19:05 PM »

I am not a super fan, but with a big old rear engine and drive train, I was thinking something similar to a Boom or other german trike. The frame in the pic would be nice with a Kwak GPZ 900 front end which I still have in the shed.

Otherwise I have a load of tube left over, and will knock one up.
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Thunderace
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Lemon Subaru


« Reply #109 on: June 20, 2018, 01:10:41 PM »

something similar to a Boom


Ok taking that as size, ninety inch wheelbase, with close to twenty four seat height.
allow five, maybe six inches ground clearance
and we are already getting near to having a cutting list for the tube lengths.

Sell the GPZ forks and the ford motors,
make new legs for Ural forks.
 trike.gif trike.gif
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Plasticpig
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« Reply #110 on: June 20, 2018, 03:09:52 PM »

The GPZ forks have long gone, but I do have the headstock/engine cradle and a nice pair of alloy trail bike yolks which fit the GPZ headstock.

 I found a drawing for an Audi Hundred Quatro which I stole and modified.

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Thunderace
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Lemon Subaru


« Reply #111 on: June 20, 2018, 06:39:58 PM »

Kwak GPZ 900 front end which I still have in the shed.

Long gone equals three hours ?

Regardless,
so, hopefully the trail bike yokes are to fit a suitable diameter tube,
which means they can be turned into some kind of leading links ?

Meanwhile the 'drawing',
Ok the stolen Audi bit is vaguely about right,
except the one I have here is the longitudinal mount,
so it's long, but not as wide.

As a rough, I would be cutting a pair of top rails at forty four inches,
bottom fifty one with forty five bend twenty six inches forward,
might merit a brace near the bend,
'Boom' seat height I think was twenty four,
so top rails eighteenish above lower,
I think when I looked at this before,
because the motor cants over right hand top rail can terminate at cylinder head,
(44 minus length of block),
while left has to go all the back to the bellhousing.
But hey that was just me looking at the thing as round tube for the front section.
If you are going to chuck a cheap glass shell over the top
then go with the box section.
I need to stop typing, I suspect I need to eat  trike.gif
 

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Plasticpig
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« Reply #112 on: June 22, 2018, 12:01:19 PM »

Just out of interest, using the bolt on rule/loophole, is it possible to take a registered frame, take out the engine and bolt it to (for example) an Audi 2 litre front subframe?

 I am thinking about that Goldwing frame to save the SVA, but I don't have 400 quid handy. And I don't think it would be that easy.

What does the panel think?
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Thunderace
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Lemon Subaru


« Reply #113 on: June 23, 2018, 09:57:48 AM »

I don't think it would be that easy.

Certainly besides the stretching of the legal 'loop-hole' it's going to present some challenges for sure.

While looking at the rear of most 'bike based' trikes there is indeed a lot of unused space,
typically I figure a little Peugeot would squeeze in there with a bit of work.

The 'work' would definitely involve chopping a few tubes,
to get the Audi installed whole lower right hand rear section of frame would have to come out !

Bottom line is that MSVA test is gona cost less than a four hundred quid,
so it's cheaper not to buy the goldwing.
a couple of twenty foot lengths of clean new ERW tube don't cost that much,
and the time spent messing trying to modify would have seen a whole new chassis built.

Getting one through the test is easy enough,
Re-read Beano's Feb-March 2015 mag  trike.gif 
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Plasticpig
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« Reply #114 on: June 23, 2018, 11:40:30 AM »

Thanks mate. The voice of common sense.
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