High speed G-maxx for ISC event, 100mph or bust

[_paralyzed_]

Originally Posted by Kcaz25

Pretty sure he told me that he used the Turnigy I linked for the XTM speed runs in question.

YESSIR

I sit corrected.

[Kcaz25]

Originally Posted by _paralyzed_

I sit corrected.

Although he may(likely) have been better off with the CC HV110. He may be using one now, I haven't kept up.

-Zack

[jzemaxx]

Been there done that.... ;)

It ended up going a little faster just not on camera. Got tired of replacing tires and the rules at that time said no foams so I stopped running. I could have gotten well past 90mph with the power I had, but got tired. I tried the HV110 and Turnigy HV100. Both worked fine with pixstix. Also I was running a much larger 1521 motor

[Rivermaxx]

So what did your truck weigh rtr?

[jzemaxx]

With the 12S setup....it was 20lbs. Its a big truck...wheelbase is 16.5"...lol

[Rivermaxx]

My truck rtr should be ~9 #'s with a 14" wheelbase. Its definatly more arrowdynamic and lower to the ground with the duh short towers and revo shocks. I would think 1/2 the weight should take 1/2 the power to hit my goal.Not too mention my foam tires are not going to explode or fail at speed hopefully.

[JThiessen]

I wonder how much help putting tape over drag items might be? Such as underneath your battery trays, tape over/under the arms, seal the edge of the body to the chassis, etc. Might be worth a few mph.

ps.....hmmm, how about a big piece of shrink wrap over the rear a-arms...just don't get it too tight. There is just soooooo much drag on these MT's.

[Rivermaxx]

I was just thinking the same thing about the tape on bottom of the chassis and sealing the edge of the body to the chassis.

[Rivermaxx]

Its kinda hard to tell but the slipstream body Neil recommended is just about perfect!Thanks Neil. I was thinking of fastening it another way rather than cut holes in the body. Like some sort of velcro on the inside of the body but not sure with the paint on the inside of the body it would be able to hold at those speeds. Heres some pics:


Look how the body is lined up perfect with the bottom of the chassis.

This reminds me of John Forces top fuel funny car. This body is very sleek and aerodynamic it should work perfect. I am thinking about putting a foam bumper on the front and shave it down to act like a splitter. I could cut and bend the front titanium skid to be the front mount.

[suicideneil]

I wouldnt butcher the Ti skids too much, those things are so hard to get hold off & you'll regret it later down the line.

Velco pads is fine, use rear body posts in the front too as they have that cross brace; cut the actual stubs off then use velcro strips to stick the body shell to the cross braces- shouldnt be an issue with the paint coming off the body, not if you use an adhesion promoter and the proper flexible lexan plate.

The front skid itself could be an issue, seeing as it is angled in such a way as to direct air under the truck, therefore creating lift- needs a front wing I reckon, mounted off of the front bulks perhaps...

Too much fun to be had working all these things out, but thats half the fun....

[Rivermaxx]

I have about 5 sets of titanium skids so I am not worried about it too much. I think the skinny front skid causing lift wont be a problem because the wide front hood and windssheild should over come it with some good downforce. I am probably going to chop it and bend it down for the front bumper splitter I am thinking about making anyway . I am going to try it without a rear wing at first if that dont work I will put one on with very little or no downforce. The verticle up rights on the sides of the wing should help with high speed stability if there is an issue.
I just talked with the tire guy and hes taking too long to get those tire made. Hes had them for 2weeks allready, wtf! taking so long . He said he will have them done by and shiped by the 25th. Well see what happens. I hope this guy dont screw me.

[suicideneil]

I hope this guy dont screw me.

... No comment...

[_paralyzed_]

It seems to me the biggest problem at high speeds is the body acting like a parachute and the truck lifting, jze always ran no body. You can seal the edges of the body but the wheelwells will always be taking in huge amounts of air.

My thinking is that the body needs to be as "aerodynamically transparent" as possible. Basically a swiss cheese body. So the air doesn't get "caught' under the body. Once testing begins if you could sacrifice a body to try it could make a difference.

I really think they only lift at speed because of the body, they don't seem to lift bodyless.

Just thinking out loud.......

[jzemaxx]

Originally Posted by _paralyzed_

It seems to me the biggest problem at high speeds is the body acting like a parachute and the truck lifting, jze always ran no body. You can seal the edges of the body but the wheelwells will always be taking in huge amounts of air.

My thinking is that the body needs to be as "aerodynamically transparent" as possible. Basically a swiss cheese body. So the air doesn't get "caught' under the body. Once testing begins if you could sacrifice a body to try it could make a difference.

I really think they only lift at speed because of the body, they don't seem to lift bodyless.

Just thinking out loud.......

Actually I did run a body.....That is why it would act like a kite.

http://www.youtube.com/user/RCTVLIVE.../1/E1-XCew1rCk

[_paralyzed_]

Originally Posted by jzemaxx

Actually I did run a body.....That is why it would act like a kite.

http://www.youtube.com/user/RCTVLIVE.../1/E1-XCew1rCk

bad linky

.....swiss cheese body........