FridgeFreezer Posted October 1, 2009 Author Share Posted October 1, 2009 I'll confirm the direction of rotation. In the meantime, between guessing how many sweeties are in the jar, any further ideas for a box of cogs with a ratio of 0.75:1 ish grealy appreciated. Quote Link to comment Share on other sites More sharing options...
Aragorn Posted October 1, 2009 Share Posted October 1, 2009 Diesel Vauxhall Omegas have a box with a 0.75:1 fifth afaik. E30 BMW's mostly have 0.8:1 fifth gears (later cars dont though) Volvo M90H2 and M90L2 boxes have 0.7:1 fifth Even our friend the R380 has either a 0.77:1 or 0.73:1 fifth gear. I think most diesel motorway cruisers will have gearing along those lines. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 1, 2009 Author Share Posted October 1, 2009 I think most diesel motorway cruisers will have gearing along those lines. True, but not many of them make 1000nm Quote Link to comment Share on other sites More sharing options...
Daan Posted October 1, 2009 Share Posted October 1, 2009 Just rob a portal box from your landy and run it in reverse, that will take the torque. Daan Quote Link to comment Share on other sites More sharing options...
callum Posted October 1, 2009 Share Posted October 1, 2009 nv5600 has 0.73 ratio in 6th Quote Link to comment Share on other sites More sharing options...
Aragorn Posted October 1, 2009 Share Posted October 1, 2009 Your not going to find a car transmission that will take that kinda torque officially tbh. Quote Link to comment Share on other sites More sharing options...
Night Train Posted October 1, 2009 Share Posted October 1, 2009 You could make one. Use a planetary gear set from an autobox or a set of hefty spur gears so that it is like a Land Rover overdrive but with the shafts in one end out the other. Look for industrial gear boxes, usually on the front of a motor and gearing down so run it the wrong way to gear it up. A tractor gear box? Quote Link to comment Share on other sites More sharing options...
simonr Posted October 1, 2009 Share Posted October 1, 2009 Sounds interesting John! You can hardly blame people for wondering - HOFS has produced some pretty cool stuff over the years! Si Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 2, 2009 Author Share Posted October 2, 2009 As TSD has just pointed out to me, as per Charlie Broomfield's Merlin-powered SD1, what about a leyland "aux box"? As fitted to a lot of Leyland trucks & buses including the Leopard. Anyone know owt about them, what they look like and where I might find one? Edited to add: Also, page 14 of this, hmmmm. Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted October 3, 2009 Share Posted October 3, 2009 There are some in the marine world that are around those ratios, but by the time you are up to 1000nm you are looking at some fairly large machines. I'd go with making one. Gears are easy to come by from various suppliers. I'm sure the skills in HOFS are up to the challenge. Quote Link to comment Share on other sites More sharing options...
landmannnn Posted October 3, 2009 Share Posted October 3, 2009 Sounds to me like there is some sort of creation like this in planning. Perhaps with portals too? Quote Link to comment Share on other sites More sharing options...
Aragorn Posted October 3, 2009 Share Posted October 3, 2009 I think the box in Charlies Merlin-powered-SD1 is a 0.33 ratio. Afaik it sits between the merlin and the jag auto box, upping the merlins revs to a range that much more usable for the jag box. He was having trouble getting the jag box built to take the 9000rpm the leyland transmission was providing it! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.