Search found 111 matches

by ChrisACT
Wed Mar 25, 2015 10:35 am
Forum: Australian Event News
Topic: Speed Week 2015
Replies: 39
Views: 19359

Re: Speed Week 2015

http://www.abc.net.au/news/2015-03-25/s ... er/6346026

ABC is reporting that Trent Clare crashed and has been airlifted to Royal Adelaide hospital.

Is he OK?
by ChrisACT
Mon Jan 05, 2015 9:08 pm
Forum: Chassis, Suspension and Saftey
Topic: Frame modification
Replies: 7
Views: 3657

Re: Frame modification

DLRA wrote:Chief Motorcycle Inspector - Graeme Hadley - motorcycle.steward@dlra.org.au..
Thanks for that. I've sent Graeme an email.
by ChrisACT
Sat Jan 03, 2015 10:34 pm
Forum: Chassis, Suspension and Saftey
Topic: Frame modification
Replies: 7
Views: 3657

Re: Frame modification

The requirements for this class include: An OEM frame must be used. Steering head angle may be altered, but must remain in its original location. Swing arm length, type and mounting method may be altered. Brackets, braces, mounts, gussets, etc. may be moved, modified or removed. Perimeter type fram...
by ChrisACT
Sun Nov 30, 2014 8:32 pm
Forum: Build Diaries
Topic: APS/G 250
Replies: 256
Views: 80081

Re: APS/G 250

I can't think of any production two stroke motorcycles bigger than the Suzuki GT750 waterbottle and Kawasaki H2.
by ChrisACT
Sun Nov 30, 2014 4:23 pm
Forum: Build Diaries
Topic: APS/G 250
Replies: 256
Views: 80081

Re: APS/G 250

Engine Class Rules say: 7.J.5 Class F: Shall be comprised of major parts and components designed primarily for use in motorcycle engines. No restrictions on fuel. Superchargers or turbochargers are not permitted. Fuel injection is permitted. 7.J.6 Class G: Same as Class F, except it is limited to e...
by ChrisACT
Sun Nov 30, 2014 1:42 pm
Forum: Build Diaries
Topic: APS/G 250
Replies: 256
Views: 80081

Re: APS/G 250

gennyshovel wrote:But it's not a motorcycle engine,,,,,,,,,
What a pity eh !
Modified Production rules states:
The engine shall be from the same manufacturer as the frame.
I can't find anywhere in the rules where it says that it must be a motorcycle engine.

Yamaha engine. Yamaha frame. No problem. :mrgreen:
by ChrisACT
Sat Nov 29, 2014 10:49 pm
Forum: Build Diaries
Topic: APS/G 250
Replies: 256
Views: 80081

Re: APS/G 250

hay Pete, i look at that photo and see cams, valves, springs, shims and buckets all condensed into one piston, :lol: ,, might have to start lookin for a Mach 111 or 1V motor, :wink: ,,, Jet ski's are your friend. Yamaha GP1300R. 1300cc, two stroke, water cooled goodness. 170HP stock and that's with...
by ChrisACT
Sun Aug 24, 2014 9:29 am
Forum: Engine Development and Performance
Topic: Methanol, Nitromethane,,
Replies: 12
Views: 6388

Re: Methanol, Nitromethane,,

The exhaust gas temperature will be different with methanol too. It runs cooler. With two strokes that has a big affect on the power band. The cooler temperature effectively increases the speed of sound inside the expansion chamber. The net effect of this is that the engine will rev higher on methan...
by ChrisACT
Sat Apr 19, 2014 10:00 am
Forum: Chassis, Suspension and Saftey
Topic: suspension yea or nay
Replies: 50
Views: 23112

Re: suspension yea or nay

Honda's under-slung fuel tank didn't work because centre of gravity isn't the primary issue with motorcycle handling in the way it is with cars. Mass centralisation is probably the big deal with bikes. Hanging the tank under the engine distributed the mass instead of centralising it. With a FF bike,...
by ChrisACT
Wed Apr 16, 2014 12:11 am
Forum: Engine Development and Performance
Topic: Pulse jet Bike
Replies: 53
Views: 21134

Re: Pulse jet Bike

This is the sort of thing I'd expect could be done at club level, reasonably safely without having to involve radical technology (or fuels) and the accompanying mega budget.


Click here to learn how to add YouTube Videos to your phpBB forum
by ChrisACT
Tue Apr 15, 2014 7:37 pm
Forum: Engine Development and Performance
Topic: Pulse jet Bike
Replies: 53
Views: 21134

Re: Pulse jet Bike

Pulsejets run great on propane. Hybrid rockets fuelled by wax should only spit chunks if they're poorly designed. Getting the correct mix of oxidiser and fuel as well as the right sized nozzle enables the correct heat and pressure inside the combustion chamber which minimizes the fuel breaking up. H...
by ChrisACT
Tue Apr 15, 2014 12:31 am
Forum: Engine Development and Performance
Topic: Pulse jet Bike
Replies: 53
Views: 21134

Re: Pulse jet Bike

Maybe I should dig out one of my many UFO's (un-finished objects) http://www.dlra.org.au/forum/download/file.php?id=260 Saw this guy https://www.youtube.com/watch?v=CDDI5h8JQE0 going over 200mph in 2.5 seconds... with just hot water. Got the details of his engine... 110L through a 75mm nozzle so I ...
by ChrisACT
Mon Apr 14, 2014 5:25 pm
Forum: Engine Development and Performance
Topic: Pulse jet Bike
Replies: 53
Views: 21134

Re: Pulse jet Bike

(I don't think solid fuel rockets would be controllable enough) Hybrid rockets can be throttled. You can use parafin wax as the fuel and oxygen or nitrous as the oxidiser. It's completely stable (safer than petrol or methanol anyway) and there's no need for the complex turbo-pumps or scary cryogeni...
by ChrisACT
Thu Apr 10, 2014 2:13 am
Forum: General Information
Topic: drive by wire
Replies: 17
Views: 7967

Re: drive by wire

ACT Chris wrote Sounds like you want the direct throttle connection a mechanical linkage provides. Bingo :D ....What I have planned would make for a rather long and convoluted mechanical linkage, wire from point A to B would make things easier. cheers Ahh ... now I geddit. It's a packaging issue. W...
by ChrisACT
Tue Apr 08, 2014 9:21 pm
Forum: General Information
Topic: drive by wire
Replies: 17
Views: 7967

Re: drive by wire

Thanks Ian :) .....Yes that's the very reason I don't want what is out there on offer i.e. where the ecu decides on what it wants to do from the input you make. if there is nothing available I will have to design and make my own or comprise with a mechanical one. cheers If you don't want the ECU de...