If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
PSRU plans
Anyone know of a site where belt drive PSRU plans or design criteris are
explained or offered, specifically for auto engine conversions. Any sources of aluminum gear-cog pulleys, belts etc. |
#2
|
|||
|
|||
PSRU plans
The belt drive sprockets sold for Harley Davidson motorcycles were one of the few sources I could find. My conclusion was that the cost of pulleys and belts was high enough to negate any advantage of designing and building your own. Just buy the entire drive. That way you get a proven system, that's not going to cause problems. That is sort of important for an airplane... http://www.northwest-aero.com/ If you insist on building something, a new process 208 transfer case off a Ford 4 wheel drive pickup has all the parts for a silent chain drive 400 HP+ - and they can be had free (usually) from the local transmission shop. "ADK" wrote in message news:kTlXf.11464$Ph4.6872@edtnps90... Anyone know of a site where belt drive PSRU plans or design criteris are explained or offered, specifically for auto engine conversions. Any sources of aluminum gear-cog pulleys, belts etc. |
#3
|
|||
|
|||
PSRU plans
ADK wrote:
Anyone know of a site where belt drive PSRU plans or design criteris are explained or offered, specifically for auto engine conversions. Any sources of aluminum gear-cog pulleys, belts etc. Planetary gear reduction drives are robust and fairly simple to lay out. -- This is by far the hardest lesson about freedom. It goes against instinct, and morality, to just sit back and watch people make mistakes. We want to help them, which means control them and their decisions, but in doing so we actually hurt them (and ourselves)." |
#4
|
|||
|
|||
PSRU plans
Just remember that you have to address the thrust loads you will have.
The transfer case just delivers torque to a driveshaft in a rotation mode. There are no thrust loads..... |
#5
|
|||
|
|||
PSRU plans
I said most of the parts are in there, not that they could be used without
modification.;^} What I did was use the front half of the case, bolted to an aluminum plate, that takes the place of the back half of the case. The sprockets are 1:1 ratio, and I eliminated the planetary gears (wrong configuration and too heavy), Which is fine for testing, but it limits the final RPM to 2700 or so, which yields about 200 HP with my 4.6l Ford engine. That's enough for me for now, but different sprockets will eventually allow another 100 HP or so. The plate side of both shafts is supported by NTN 6207 bearings. The specs show allowable thrust loads that are adequate. I will be watching them closely however. "stol" wrote in message oups.com... Just remember that you have to address the thrust loads you will have. The transfer case just delivers torque to a driveshaft in a rotation mode. There are no thrust loads..... |
#6
|
|||
|
|||
PSRU plans
Inside the transfer case, there are 2 silent chain sprockets. They are both
the same size, so the ratio is 1:1. That's fine for me right now, because I don't approve of running an american V8 at 5000 RPM continuous and expecting it to hold up long term. At 2600 RPM, I get right at 200 HP. If I need more than that, it will be very short term, and nitrous oxide injection can get me another 75 HP for a few seconds. But I'm not there yet. 200 HP may be just fine all around. If we insist on a 1.8:1 or so PSRU, different sprockets are available. http://www.ramseychain.com/products.asp To change this, I'm going to have to buy one or 2 new sprockets, and machine the "ADK" wrote in message news:_tDXf.28352$%H.13421@clgrps13... What ratios are available using transfer case drives? |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Washington DC airspace closing for good? | tony roberts | Piloting | 153 | August 11th 05 12:56 AM |
Duster Plans For Sale - BJ-1b fullsize sailplane plans | WoodHawk | Soaring | 0 | April 25th 05 04:37 AM |
want to trade 601 plans for 701 plans | [email protected] | Home Built | 0 | January 27th 05 07:50 PM |
Unused plans question | Doc Font | Home Built | 0 | December 8th 04 09:16 PM |
Modifying Vision plans for retractable gear... | Chris | Home Built | 1 | February 27th 04 09:23 PM |