Richard Paul

iTrader: (5)

What you want is a "Motor" vs an "engine". They for the most part give max torque at stall speed. Like electric, hydrulic, vacuum etc.
I don't think this is compatable with chassis dynamics as we know them. Or driving in a high performance manor with said chassis.

Granted no one has had to think of new chassis designs to work with this type power curve. Still hp has to have the componant of speed an distance added to torque. But ploting that curve should give a linear line. I have never tried it. You guys need the mental ************ more then I.

Rotarian_SC

So that's why we turn to the forum instead of women *smacks forehead*

Richard Paul

iTrader: (5)

I don't know if I want to touch that.

I do know that as much as I love the forum, Women are better and I love them expotentionaly more.:D Even if they are more trouble.

Ajax

So what kind of chassis do you think handles this motor? Because I have one
Wouldn't you love to have that kind of power curve in an RX8? Just cut everything off at 10k RPM.

epitrochoid

looks like we better get an electric motor in there!

Richard Paul

iTrader: (5)

Ajax, I don't know how you came up with those plots but a good test is that torque and hp must cross at 5252 rpm.

bobclevenger

Note that those plots are for a .07hp motor!
Power curve is in watts and peaks at about 55 watts (746 watts per hp if you want to do the math, anybody).
The motor in question seems to be running on one volt (40 watts at 40 amps, from the curves).

twospoons_

F=ma. If force is the same, acceleration is the same. Hence a flat hps curve will lead to a linear increase in velocity. (If you take air drag out of the equation)

Rotarian_SC

Don't worry about it. Women are better.

I bet 44 will be disappointed by that comment though

zoom44

HEY!! :D i can ban you ya know hehehej/kj/k

MikeLMR

or run at a constant 13KRPM with a CVT I'd run one in an rx8 .... but it'd have a lexan bodyshell

Richard Paul

iTrader: (5)

Just hit me, I'm a little slow. Lexan body, DAH! Great hint. Slotcar. :D
I knew there was something strange when ajax wanted a .07hp motor.

epitrochoid

torque is a force, not horsepower.

Ajax

it's one of the mods i have in one of my 4 1:10 RC cars.

I think that's the plot for my 8x4 (8 turns 4 winds).. One of the 2 fastest I own.. It will literally tear the tires off the rims if you drive it on pavement.

EDIT: Oh yea, it's running a slipping diff. The whole car is titanium linkages and carbon fiber chassis. Probably weighs about 5lbs with a battery. 0-60 in 1 second :b

Richard Paul

iTrader: (5)

Why on that scale would you use titanium? Aluminum is lighter and will be strong enough. It is easier to work with and cheaper.

Ajax

Titanium for linkages is pretty much imperative when you drive offroad. The shock you take on an impact is incredible. Aluminum linkages would bend under the force, whereas titanium just takes a beating and doesnt think twice about it.

We don't use anything aluminum that is exposed to stress. My tranny screws are aluminum and some of the standard mount screws are. That's it. Everything else is stronger material.

I don't have any on road vehicles. If I did, I would totally agree with you that aluminum would be the way to go for most of the parts. I dont actually aluminum screws because they wear too much when you do a rebuild. The heads strip far too easily and I like to tear down and rebuild a tranny in a matter of a few seconds.

As far as titanium goes though, I have titanium linkages and kingpins on almost every offroad RC I own. Some of them have more TI than that. Yea, it is expensive, but it's easily justifiable vs the standard parts.

globi

Ajax, just curious since I've never heard of carbon fibered RC cars. Is there a website?

rotarygod

Alot of R/C car chassis are made out of carbon fiber. When I did it as a kid they were graphite chassis but close enough.

Ajax

Graphite is and was very popular but no longer for offroad. I had graphite shock towers for a while and i snapped them after 1 race. They were just too brittle.

As far as websites go, both pro teams losi and associated use carbon fiber for the chassis.

Losi: http://www.teamlosi.com
Associated: http://www.rc10.com

Richard Paul

iTrader: (5)

Back on topic you guys. It's Airplanes remember?

rotarygod

Everything flies Richard. Some of them need to be going faster than others to do it.

Richard Paul

iTrader: (5)

I know that, I once flew a Formula Atlantic car in Newfoundland, right into a traffic light at about 140 mph. When your driving and you realize that the steering , the brakes, and throttle have no effect on the cars direction, your flying.
And it's probably going to hurt.

slavearm

How about really getting on topic and talking about RP building an Axial Flow for the 8?

epitrochoid

yeah really...my RP shifter has me all excited about the AFB!

Aoshi Shinomori

140mph How bad was the medical bill? Glad you made it, otherwise no blower for me :p