Thud
1 MW
EDIT: I am back onto this project again & its my only focus till shes complete. I will add the latest news here in the OP & may have a mod come clean up the thread alittle bit.
Here is where we'r at:
I have bought 5 frames off E-bay looking for a plug & play or at least a suitable compromise for the race bike.....after all is said & done I am going with the original plan of a Fully suspended carbon fiber framed Road racer. Here are some specs for the machine:
4" of wheel travle at both ends.
Girder forks with a fox airshock
Britten inspired rear suspension to keep battery weight where it does the most good.
setting up on 60v with customised outrunners for power...(yes 2 of the smaller 80-85 rewound & optomised for my 3006fet powered Xie Cheing controllers)
will use my 2-speed tranny set up with a tighter ratio for better transition fron low to high. we'll decide on ultimate top speed on practice day....In testing last fall I have been getting 52mph on a single stock motor on 44v.....
enough dribble here are some photo's to pique your imaginations.
Lets make an "inatimate carbon tube"!
in this photo you see a 1.5" steel tube i used for a mandrel...its a left over form a job, powdercoating is incedental. We waxed it up real good & have it wraped with a few layers of waxed paper...only taped on the ends outside of the tube we are constructing. the CF is 5oz weight .010"t 2x twill pattern (on sale-ebay) & I am using west systems for this pc (its what i have on hand...other stuff is priced better)
Now we wet out the carbon fabric...this is the cool part, wetting fiberglass makes it disaper form view....wetting Carbon makes a black hole in you table top. increadble depth visual effect..photo's can't do it justice.I spread the resin around with a flexi spatula & make certain we have it all wetted out.
Next we cover the cloth with some plastic & really squigie out any excess resin....we want only enough to wet the fibers & any extra just adds weight.we can really push on the fabric through the plastic & force resin out between the sheets & contain the schticky schtuffs.
Now we wrap the mandrell with the cloth.....i worked slowly & rubed it down as being careful not to introduce any bubbles in the lay up...I am making a 7 layer wall tube & did the math for 2 pcs .....repeat the steps for the 2nd layer & really rub the forcing it into physical contact with the previous laters...I then squigie around the tube removing as much resin as possible while not starving any sections...its a visual inspection simular to brushing varnish...you can tell where a "dull spot" develops.
I have vacume bagging equipnment but given the simple shape of this tube I just carefully wraped it in more plastic drop cloth to maintian presure on the fibers & let her set for a few hours.
the streatch wrap secured the plastic at both ends, then I used a pattern wheel to make some holes in the covering anywhere i found pooling of resin...amazing how much comes out on a proper lay up.
the finished product, pulling off the mandrell is the work part of the project, can't stress enough about proper releas agents & resin proof backing on the mandrell.
thats 8oz for us amerikans. over sized tube
here is is fish mouthed for the head tube & dulled up from abrading for the tack gluing in place.
next we mix up some high temp rated 30minute epoxy & add carbon flocking for some added strength....this will hold the joint until we wind it with tow & dress it up with weave.
& here is the head tube glued on & held in place with some streachy electrical tape. The aluminum is wraped in a single layer of 6oz glass to protect from galvanic reaction with the carbon.
thats enough for tonigh. I'll get a screen shot of the revised cad tomorrow.
Here is where we'r at:
I have bought 5 frames off E-bay looking for a plug & play or at least a suitable compromise for the race bike.....after all is said & done I am going with the original plan of a Fully suspended carbon fiber framed Road racer. Here are some specs for the machine:
4" of wheel travle at both ends.
Girder forks with a fox airshock
Britten inspired rear suspension to keep battery weight where it does the most good.
setting up on 60v with customised outrunners for power...(yes 2 of the smaller 80-85 rewound & optomised for my 3006fet powered Xie Cheing controllers)
will use my 2-speed tranny set up with a tighter ratio for better transition fron low to high. we'll decide on ultimate top speed on practice day....In testing last fall I have been getting 52mph on a single stock motor on 44v.....
enough dribble here are some photo's to pique your imaginations.
Lets make an "inatimate carbon tube"!
in this photo you see a 1.5" steel tube i used for a mandrel...its a left over form a job, powdercoating is incedental. We waxed it up real good & have it wraped with a few layers of waxed paper...only taped on the ends outside of the tube we are constructing. the CF is 5oz weight .010"t 2x twill pattern (on sale-ebay) & I am using west systems for this pc (its what i have on hand...other stuff is priced better)
Now we wet out the carbon fabric...this is the cool part, wetting fiberglass makes it disaper form view....wetting Carbon makes a black hole in you table top. increadble depth visual effect..photo's can't do it justice.I spread the resin around with a flexi spatula & make certain we have it all wetted out.
Next we cover the cloth with some plastic & really squigie out any excess resin....we want only enough to wet the fibers & any extra just adds weight.we can really push on the fabric through the plastic & force resin out between the sheets & contain the schticky schtuffs.
Now we wrap the mandrell with the cloth.....i worked slowly & rubed it down as being careful not to introduce any bubbles in the lay up...I am making a 7 layer wall tube & did the math for 2 pcs .....repeat the steps for the 2nd layer & really rub the forcing it into physical contact with the previous laters...I then squigie around the tube removing as much resin as possible while not starving any sections...its a visual inspection simular to brushing varnish...you can tell where a "dull spot" develops.
I have vacume bagging equipnment but given the simple shape of this tube I just carefully wraped it in more plastic drop cloth to maintian presure on the fibers & let her set for a few hours.
the streatch wrap secured the plastic at both ends, then I used a pattern wheel to make some holes in the covering anywhere i found pooling of resin...amazing how much comes out on a proper lay up.
the finished product, pulling off the mandrell is the work part of the project, can't stress enough about proper releas agents & resin proof backing on the mandrell.
thats 8oz for us amerikans. over sized tube
here is is fish mouthed for the head tube & dulled up from abrading for the tack gluing in place.
next we mix up some high temp rated 30minute epoxy & add carbon flocking for some added strength....this will hold the joint until we wind it with tow & dress it up with weave.
& here is the head tube glued on & held in place with some streachy electrical tape. The aluminum is wraped in a single layer of 6oz glass to protect from galvanic reaction with the carbon.
thats enough for tonigh. I'll get a screen shot of the revised cad tomorrow.
)
)
