looks very nice; I love the coil spring set-up. How did you go about deciding your spring rate? Did you just estimate the total weight of the vehicle and divide that by 16? Did you plan for specific ground clearance when fully loaded? (I'm asking because I'm about to plan out a suspension and would like others' thought processes)
Thanks On Mon, Jan 12, 2009 at 12:04 AM, Modena <b...@holnet.net> wrote: > > the preload is adjustable - the top spring seat can be brought lower > by adding washers which have a larger diameter than the spring > diameter, this compresses the spring more before adding load, and > similarly you can add large washers to the lower spring seat to > "raise" the bottom of the spring. > > as it "stands" it has 75mm of ground clearance, I have stood on it, > and it takes my weight without fully compressing (remember there are > 16 of those suckers) > > piling on 25kg of lead weigh (without me as well) t brought it down > less than 1cm > > I cant be any more precise until I now the battle ready weight, and > that is way off > > > On Jan 12, 8:50 am, Mike Måne <mike082...@gmail.com> wrote: > > I meant the vertical travel. I'm just trying to get ideas for my Newbie > > Sherman. > > > > Another question: With 1.5" - 2" of space, with the springs you used > > combined with the weight of your tank, how much do you think the > suspension > > will flex with the tank immobile? In other word, how far down will the > body > > push down on the springs with all its weight---that is, if it does at > all. > > The reason why I ask is because I am wondering how one could adjust the > > spring strength (without buying new ones) in case the weight of the > vehicle > > must change. > > > > Thanks and good work, > > - > > > > > > > > On Sun, Jan 11, 2009 at 3:42 PM, Modena <b...@holnet.net> wrote: > > > > > you mean lateral flex parallel to the ground? its all adjusted pretty > > > exact with nyloc nuts, there's about 0.5" of space between the lower > > > chassis rail and the closest piece of the suspension arm > > > > > if you mean total travel of the suspension perpendicular to the > > > ground, 1.5" is about it, it can go to 2" but we get some serious > > > spring deformation > > > > > On Jan 12, 8:31 am, Mike Måne <mike082...@gmail.com> wrote: > > > > Nice work, Modena. Are you going to colour the Tiger orange like the > > > wheel > > > > hubs? :D By the way, how far (toward the body) can the suspension > flex > > > > before reaching the bar--or whatever? > > > > > > On Sun, Jan 11, 2009 at 5:09 AM, Chris Malton <chr...@cmalton.me.uk> > > > wrote: > > > > > > > Looking very nice. > > > > > > > Mine got to that stage, and has now "got stuck" in the track design > and > > > > > build stage. I hope your one doesn't! > > > > > > > Chris > > > > > > > On 11/01/2009 10:55, Modena wrote: > > > > > > oh I forgot to add, I hoping I guessed the spring rate correctly, > as > > > > > > you can see a 1" bar is enough to cause travel without lifting > the > > > > > > chassis, but the whole thing takes my entire weight too when I > stand > > > > > > on it (roughly 85kg's) > > > > > > > > currently all the springs are the same type, I can adjust the > > > pre-load > > > > > > by adding large diameter flat washers to bring the top of the > spring > > > > > > closer to the bottom of the spring when the suspension is at > rest, I > > > > > > also might need to change to a stiffer spring for front and rear > > > > > > bogies because they will take more stress from the track wrap > > > > > > > > On Jan 11, 9:50 pm, Modena<b...@holnet.net> wrote: > > > > > >> its a Tiger, and its now rolling! Just not under its own power > > > yet... > > > > > > > >> 16 wheel independant suspension > > > > > > > >>http://www.holnet.net/images/tank/20090111/ > > > > > > > >> I've pretty much decided to do a chain track, I cant find hinges > the > > > > > >> exact size I want, and they would cost more than a chain > solution > > > too > > > > > > > >> On Jan 11, 5:18 pm, "Chrysanthos Kanellopoulos"< > xchr...@otenet.gr> > > > > > >> wrote: > > > > > > -- > > > > -Mike Måne @http://moonrcprojects.googlepages.com > > > > -- > > -Mike Måne @http://moonrcprojects.googlepages.com > > > -- ---------- Donald Shankin Computer Engineering Undergrad Blue Marble Security Member IEEE Vice Chair, MTU Chapter NSBE Telecommunications Chair, MTU Chapter CAEL Partner (507) 301-2499 dtsha...@mtu.edu dshan...@gmail.com ---------- --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat-unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat -~----------~----~----~----~------~----~------~--~---
