FG bumper on hpi baja
03-18-2009, 02:43 AM
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FG bumper on hpi baja
has anyone tried a fg bumper on a hpi baja? i had a fg monster beetle and that bumper seemed to hold up good. so i was thinking about doing this mod to my baja
03-18-2009, 05:59 PM
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RE: FG bumper on hpi baja
I bought the MT upgrade bumper set, the one that also connects to the front shock tower. That is one tough bumper, the oly problem I have is there are no crumple zones on the tubes that connect from the bumper to the front shock tower. So, when I hit smething, the forces are directly transmitted from the front bumper to the shock tower, which in turn transfers its force to the TVPs. And the TVPs thus bow out from buckling, making the FG look fatter, at least until you dismount them and flatten them back again.
As for the stock simple plastic bumper, I moved the stock one to the back since FGs do not even have a rear bumper.
Something I though about is trying to see if I could adapt a 5T bumper set to the FG MT. Though the 5T bumper is funny looking, it is designed to crumple by bowing up so that all the forces are not transmitted to the TVPs.
As for the stock simple plastic bumper, I moved the stock one to the back since FGs do not even have a rear bumper.
Something I though about is trying to see if I could adapt a 5T bumper set to the FG MT. Though the 5T bumper is funny looking, it is designed to crumple by bowing up so that all the forces are not transmitted to the TVPs.
03-18-2009, 08:23 PM
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RE: FG bumper on hpi baja
this is the one that im thinking about trying
http://www.davesmotors.com/s.nl/c.88...t.A/id.1986/.f
http://www.davesmotors.com/s.nl/c.88...t.A/id.1986/.f
03-18-2009, 09:16 PM
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RE: FG bumper on hpi baja
Yeah, that is the bumper I have too. I also have the buggy-type bumper which is a curved looking piece. Both of these are okay, they are more like front skid plates if anything. But as for actually absorbing frontal hits, they are way too easily overcome by the impact force.
But considering the HPI 5B does not even have a front bumper, this would give it something in addition to functioning like a front skid plate.
But considering the HPI 5B does not even have a front bumper, this would give it something in addition to functioning like a front skid plate.
03-19-2009, 04:50 AM
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RE: FG bumper on hpi baja
talking about FG bumpers my friend just bought a brand new FG yesterday the lucky son of a B lol . and tommorow i'll be making a real beasty alloy front bumber for it tig welded and constructed by me . damn i keep telling myself i need to make a bunch and sell on ebay .
03-19-2009, 09:01 PM
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RE: FG bumper on hpi baja
Whenever you get it made, mount it up and post it!
As for impact absorption, I suggest you include some sort of plastic component to flex and take the forces, and then return to its original shape.
Or alternatively, is using all metal, using articulation with spring loadings (using strong springs) so that the bumper will in this case also return to its original position.
Maybe a scissor-like action with springs at the hinges, and to toughen up the stiffness to absorb more forces, more springs on the remaining hinges.
I wonder if a telescoping type mechanism is possible? Like a shock design? Or a combination of shock and scissor mechanism?
So many geometric possibilities, I will have to play with them to see what kind of force absorption multipliers I can dream-up.
When you do make the bumper, I defo want to see it! Damn, Im inspired now, Im going to log off for a min or so to see if I can dream up a hardy bumper that can be made by materials bought at a hardware store and welded.
Bear with me, I know nothing about welding, so, any of you welders who can chime in, correct me where I am wrong in my choice of materials and the feasibility of welding by way of MIG or TIG or whatever else weld is appropriate.
As for impact absorption, I suggest you include some sort of plastic component to flex and take the forces, and then return to its original shape.
Or alternatively, is using all metal, using articulation with spring loadings (using strong springs) so that the bumper will in this case also return to its original position.
Maybe a scissor-like action with springs at the hinges, and to toughen up the stiffness to absorb more forces, more springs on the remaining hinges.
I wonder if a telescoping type mechanism is possible? Like a shock design? Or a combination of shock and scissor mechanism?
So many geometric possibilities, I will have to play with them to see what kind of force absorption multipliers I can dream-up.
When you do make the bumper, I defo want to see it! Damn, Im inspired now, Im going to log off for a min or so to see if I can dream up a hardy bumper that can be made by materials bought at a hardware store and welded.
Bear with me, I know nothing about welding, so, any of you welders who can chime in, correct me where I am wrong in my choice of materials and the feasibility of welding by way of MIG or TIG or whatever else weld is appropriate.
03-20-2009, 02:22 AM
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RE: FG bumper on hpi baja
ORIGINAL: SAVAGEJIM
Whenever you get it made, mount it up and post it!
As for impact absorption, I suggest you include some sort of plastic component to flex and take the forces, and then return to its original shape.
Or alternatively, is using all metal, using articulation with spring loadings (using strong springs) so that the bumper will in this case also return to its original position.
Maybe a scissor-like action with springs at the hinges, and to toughen up the stiffness to absorb more forces, more springs on the remaining hinges.
I wonder if a telescoping type mechanism is possible? Like a shock design? Or a combination of shock and scissor mechanism?
So many geometric possibilities, I will have to play with them to see what kind of force absorption multipliers I can dream-up.
When you do make the bumper, I defo want to see it! Damn, Im inspired now, Im going to log off for a min or so to see if I can dream up a hardy bumper that can be made by materials bought at a hardware store and welded.
Bear with me, I know nothing about welding, so, any of you welders who can chime in, correct me where I am wrong in my choice of materials and the feasibility of welding by way of MIG or TIG or whatever else weld is appropriate.
Whenever you get it made, mount it up and post it!
As for impact absorption, I suggest you include some sort of plastic component to flex and take the forces, and then return to its original shape.
Or alternatively, is using all metal, using articulation with spring loadings (using strong springs) so that the bumper will in this case also return to its original position.
Maybe a scissor-like action with springs at the hinges, and to toughen up the stiffness to absorb more forces, more springs on the remaining hinges.
I wonder if a telescoping type mechanism is possible? Like a shock design? Or a combination of shock and scissor mechanism?
So many geometric possibilities, I will have to play with them to see what kind of force absorption multipliers I can dream-up.
When you do make the bumper, I defo want to see it! Damn, Im inspired now, Im going to log off for a min or so to see if I can dream up a hardy bumper that can be made by materials bought at a hardware store and welded.
Bear with me, I know nothing about welding, so, any of you welders who can chime in, correct me where I am wrong in my choice of materials and the feasibility of welding by way of MIG or TIG or whatever else weld is appropriate.
03-20-2009, 03:21 PM
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RE: FG bumper on hpi baja
Looks good,it is "enough" bumper for this car in my opinion
Well,maybe it could have been a tad more forwards to take the impact a little bit before the wheels does it.Very nice Baja by the way!
Well,maybe it could have been a tad more forwards to take the impact a little bit before the wheels does it.Very nice Baja by the way!
03-20-2009, 06:02 PM
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RE: FG bumper on hpi baja
man im loving it!!!!! it looks good on the baja. thanks for the pics... i know how strong those fg bumpers are and for $13 you cant go wrong. what mods and cutting did you have to do? do you have any pics of the underneath
03-20-2009, 06:08 PM
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RE: FG bumper on hpi baja
If anything, just a simple drill and adding nuts and bolts of the proper diameter.
I am sure he used the existing holes on the front end of the 5B, simply drilled holes into the plastic FG bumper, and bolted it right up! At least that is how I was able to mount that same bumper on the rear of my 2WD FG.
I think he said it bolted staright up, so the holes, if anything, are a perfect match for the 5B. I hope he comes back to confirm.
I am sure he used the existing holes on the front end of the 5B, simply drilled holes into the plastic FG bumper, and bolted it right up! At least that is how I was able to mount that same bumper on the rear of my 2WD FG.
I think he said it bolted staright up, so the holes, if anything, are a perfect match for the 5B. I hope he comes back to confirm.
03-20-2009, 06:21 PM
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RE: FG bumper on hpi baja
ORIGINAL: SAVAGEJIM
If anything, just a simple drill and adding nuts and bolts of the proper diameter.
I am sure he used the existing holes on the front end of the 5B, simply drilled holes into the plastic FG bumper, and bolted it right up! At least that is how I was able to mount that same bumper on the rear of my 2WD FG.
I think he said it bolted staright up, so the holes, if anything, are a perfect match for the 5B. I hope he comes back to confirm.
If anything, just a simple drill and adding nuts and bolts of the proper diameter.
I am sure he used the existing holes on the front end of the 5B, simply drilled holes into the plastic FG bumper, and bolted it right up! At least that is how I was able to mount that same bumper on the rear of my 2WD FG.
I think he said it bolted staright up, so the holes, if anything, are a perfect match for the 5B. I hope he comes back to confirm.
03-20-2009, 06:27 PM
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RE: FG bumper on hpi baja
I added and drilled nothing, direct bolt on. Just had to use a little longer bolts and put a couple flat washers on the bolts. DIRECT FIT.
03-21-2009, 10:53 AM
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RE: FG bumper on hpi baja
I drew up some initial looks for a custom bumper, I only did it for looks right now. I didnt do a side rendition yet.
I havent bothered with calculating the loadings on the members yet since I am still toying with how they should look.
I havent bothered with calculating the loadings on the members yet since I am still toying with how they should look.
03-21-2009, 10:59 AM
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RE: FG bumper on hpi baja
Also, I have yet to even toy with crumple zones to asorb the KE from frontal hits, so the longitudinal bars as shown right now are not what will be on a more final design.
I am seriously considering a scissor-bridge kind of set-up or even a conventional cross-scissors setu-up.
I know, such things will be expensive due to the materials I have in mind and the amount of parts that need to be made as well as the number of parts there will be. But this is only an excercise of trying to come up with a means to effectively absorb the crash. If I want to possible toy with the idea for mass production and cost consideration, I will daydream up ideas to simplify the design.
I am seriously considering a scissor-bridge kind of set-up or even a conventional cross-scissors setu-up.
I know, such things will be expensive due to the materials I have in mind and the amount of parts that need to be made as well as the number of parts there will be. But this is only an excercise of trying to come up with a means to effectively absorb the crash. If I want to possible toy with the idea for mass production and cost consideration, I will daydream up ideas to simplify the design.
03-22-2009, 03:45 AM
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RE: FG bumper on hpi baja
hey i made the fg bumper for my friend but now im the one that owns his new truck lol i traded him one of my two modded up baja5b's . but now that you mention adding springs to the bumper bar so that if it takes a hit the front plate can be pushed in and absorb the impact before making any damage to the truck . Ive got an image in my head of how i can make this so i think i'll soon be constructing another version .
i also included a pic of a bumper for my 5B that i made
i also included a pic of a bumper for my 5B that i made
03-22-2009, 07:19 PM
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RE: FG bumper on hpi baja
I like the bumper you actually have on your FG. As for the bumper, does it have some give so that it absorbes some of the the forces and prevents the rest from transferring to the rest of the RC?
It looks very hardy though.
It looks very hardy though.
