Scale racing

[pumpdoc 2]

ok what is 1/5 scale ? My R/C collection starts with Unlimted Hydros

don't know the scale but the avg. boat that we run is aprox.

3'-4.5' L with small chain-saw motors get some good speed out of them

a true 30-50 mph wicked is all I can say, when you catch a roost or a

wave wrong they go flying!!! I also have a good collection of scale

F1-R/C cars incl. a 6 wheel tyrell that I just found out that it's

worth to be in the 400-600$ range, not that it's for sale, and a cpl.

of slot cars Can-Am Mclarens, A '90 F1 Mclaren and a '92 Williams,

both of them are Tam's R/C's that have been thourly thrashed,but lovingly

repaired and run again..

[rodders47 2]

Hi Pumpdoc, well 1/5th scale is just that , a scale version of the worlds TOURING cars that are currently running in say the european 2 litre class or the north american touring car class, and we use bodies like the Honda Accord, Volvo s 40/60 etc etc

The cars have a 235 mm wheelbase, use a 23 cc engine and run on racing rubber of various grades. This rubber compound, whilst not filled with air but an inner liner, is sensitive to heat, so in order to race you have to get the tyres up to temp and also the 4 wheel disc brakes, some hydraulicly operated, some by cable, depends how BIG your pockets are :-)

the cars weight aprox. 10 kilos and the motor power output varies from 3.4 HP up to 6.5 hp and rev to about 19,000 rpm, are capable of about 100 kph down the back straight at our club

[rodders47 2]

Hi Pumpdoc, well 1/5th scale is just that , a scale version of the worlds TOURING cars that are currently running in say the european 2 litre class or the north american touring car class, and we use bodies like the Honda Accord, Volvo s 40/60 etc etc

The cars have a 235 mm wheelbase, use a 23 cc engine and run on racing rubber of various grades. This rubber compound, whilst not filled with air but an inner liner, is sensitive to heat, so in order to race you have to get the tyres up to temp and also the 4 wheel disc brakes, some hydraulicly operated, some by cable, depends how BIG your pockets are :-)

the cars weight aprox. 10 kilos and the motor power output varies from 3.4 HP up to 6.5 hp and rev to about 19,000 rpm, are capable of about 100 kph down the back straight at our club

[pumpdoc 2]

Cool sounds like fun I run a 27cc motor in my unlimited

by the way which I'll be running this weekend as the big

boys come to San Diego for the season finale. they race

the unlimiteds F1 tunnles flat bottom drag boats and one other class

I can't think of off hand. The scale Hydros will race fri. and sat.

in the scale raceing boat basin aprox 150mx40m. and then on sunday

we get to put on a show on the bay by the hot pits, they set up a

cpl. of turn buoys aprox 200m apart and we'll run a 7-10 min. race

at that distance and being early am. the water will have just a

slight ripple to it hopefly and with the right prop speeds

will reach 130-140 mph in the strts. and 60-90mph in the

turns depending on your line outside being fastest,

last yr we had 10 boats and it was a gas seeing 10

rooster tails side by side into the first turn, of course

4 boats didn't make it thru but it was fun our boats

as your cars are only limited by how deep your pockets

are race props being the big ticket item costing

as much as a motor for good ones all custom made no off

the shelf stuff.My first boat was wood construction, but

my current boat is 'glass 2 piece, and I had to make

the molds for it, about 60 hrs. of work to make the moulds

and 3 trys to get it right, the hull halfs that is, but when

it's done right and alltogether it is strong I flipped it on it's

1st shake down run at aprox 50mph a reverse 2-1/2

so it came down on it's top but after clean out of water etc.

it was back to it. A buddy is trying to get me to mount

a mini cam for the race on the bay, said he'll spring

for the goodies ,but it'll add a kilo to the boat which will

mean the only shots will be of the tail ends of the other

boats and that bites

[TotalF1 Jens 0]

That has to be seriously awesome to do, I've seen a couple of races and it's DAMNED crazy watching the things go!

All I have is a '91 Ferrari on my Scalectrix track, and also a '93 Mclaren

[rodders47 2]

Hi Jens , well if you get a chance to watch a European 1/5th race , go for it, it is a close racing as you are ever likely to see in F1 or whatever. I will try and find out when a race meet is programmed for near you.

And believe me 30 minutes of racing is sure body draining, like I'm a wreck after 30 mins. I have no idea how F1 guys last 2 hrs

Rod

[rodders47 2]

Hi guys/ Jens well I goofed there. the 1/5th cars are 535 mm wheelbase ( not 235mm as I said ) and well they have a minium weight of 9.5 kg's without fuel ( um no driver to contend with LOL) and have from 3.4 to 6.5 Horsepower to deal with on tyres with a compound similar to normal race tyres. Some are fitted with Hydraulic brakes ( if your pocket is deep enough that is ) but over all is very good racing ..I LUV IT

[pumpdoc 2]

Well to make a long story short---wipe out-----

Sun. 7:00am Mission bay is glass-they set out the

turn pylons for a 3/4 mile oval with 1/4 mile straights-

1/8 mile turns 6 of us with 10 ft. spacing side to side

I got lane 5 not bad you can carry more speed into

the turns and if you are fast you can cut in on the

straights-on the boat you have throttle, turn,front trim

via mini elevators and rear trim via turn scag (frt-rear) it

helps the boat to bite into the turn if it isn't set right----

spin-out or worse! the prop drive has a fluid clutch

so you can idle the motor, on your controler

you run the trims with slide switches and joys for

go fast an turn- well we do a GP type start and a formation

lap to get lined up-you cross the line early you have to

circle back-I thought I was going to cross early so

I throttled back and then honked on it out of the first

turn I was dead last-so I got on it hard out of the turn

while trying to adjust trim etc. oopppsss

I'm about 2/3rds the way down the straight and next

thing I see is this BIG a## BOAT doing a blow over

and I'm thinking glad it's not---oh s##te it is ME!!!!!

game over boat in 3 pieces------------------but it did

look cool!!!!! the wife said

there goes your mad money for the yr hahahahaha

[rodders47 2]

Hi Pumpdoc,

Well I used to fly model aircraft in England. I Built this very true to scale british norman Islander , twin engine, modeled after a company that flew them in the Guernsey Islands.

They wanted some pics of the plane in flight and offered me a free flight & w/end in Guernsey and a tour of the company in return .

So I get a mate with a good camera, and off I go flying this model, he kept saying lower and closer so he could get some good close up shots, so I throttled back on the engines, set the flaps half way down and came round nice and slow and low, great pic , really looked the part, so I just opened the throttles and ummmmmmm the B.....y thing stalled ( forgot to put the flaps up) and well it finished up in smaller pieces then the original kit !!!!!. BLACK bag time :-(

Alas I missed out on the B.......y free trip also

Joys of modelling

[pumpdoc 2]

Joys yes I too tried my hand at powered flight,

it got to be rather sad you spend all,that time etc.

cutting glueing, dopeing looks all pretty, you send it

up and splatt!!!! it's all in pieces again!!! so I switched

to gliders, we have some wicked places for gliders out here

and the sand dunnes are perfect for learning without to much

damage done, but it tis not the same rush as with

powered flight, just a lot cheaper. They had me on

the gun at 78mph at point of hull taking flight,

it was even showed on the local news,but I didn't see

it, I'm trying to get a copy of the tape from the station

but no word yet.

[pumpdoc 2]

Joys yes I too tried my hand at powered flight,

it got to be rather sad you spend all,that time etc.

cutting glueing, dopeing looks all pretty, you send it

up and splatt!!!! it's all in pieces again!!! so I switched

to gliders, we have some wicked places for gliders out here

and the sand dunnes are perfect for learning without to much

damage done, but it tis not the same rush as with

powered flight, just a lot cheaper. They had me on

the gun at 78mph at point of hull taking flight,

it was even showed on the local news,but I didn't see

it, I'm trying to get a copy of the tape from the station

but no word yet. My wife just reminded me to not

foget my try at submarines, built this beut of a

Trident boomer compleat with "A" motor missles

launched while on the surface of course, first

couple of cruises not bad down and up, in the pool

next time out on a lake, down and-----gone!!!

I ran to short of an antenna wire lost contact

and the failsafe floats didn't deploy, never found it

[rodders47 2]

Well I built a Fully Scale version of an F-15 C fighter aircraft, 7'6" long with TWO ducted fan engines that run at 46,000 RPM, This aircraft had fully retracted landing gear ( Olio's) that were oil filled ( all made by myself except the Fibreglass airframe), with an airbrake and ejection canopy and pilot etc. Cost 5,000 UK Pounds all up and the first flight was sure nerve racking.

I flew that baby for years, no problems at all and was clocked at about 20 feet of the runway at 250 MILES per HOUR !!!!!!! Went like S.....T off a shovel

Sold it beforte returning to OZ for 3,000 pounds!!

[pumpdoc 2]

Hot Damn Rod another nut like me,

ever try Rocketry?? I have a buddy who works for

Rockwell building rockets for a living, any way a few

yrs back we built a Saturn 5---3 stage monster

from escape rockets to tail 12'-6" tall-aprox

42lbs. when ready to launch, we took it out to the

desert here in So. Cal. to do a morning launch.

this guy is a frickin loon he made the solids himself

God knows with what, 1st stg. was 6' tall with 5 engines

1-1/4" dia. (id.)x4' long aprox burn time 8 sec. with

3 of those on pad before release, 2nd stg. 3 eng.

1" id. x 18" 3.5 sec. burn, 3rd stg. 2 eng. 1/2" dia.

x8" long, 2sec. burn. Each stage had it's owen

parachute and the Last (Apollo) had a mini cam in it

with aprox 25 sec. film in it, ther must have been

100 people watching, when it left the pad it was

making a noise I've never heard,anyways it started to

corkscreww and wobble a bit then just as I thought

that it was going to tumble it got right staged once

twice and all you could see was smoke!!!! got all the

parts back in good shape camera only lasted 4secs.

before it got knocked out of foucus and the altm.

didn't work so only a geuss as to how high,

we had a spotter team on a nearby mtn. 5miles

away and at 4,200' and they filmed it going above them

by maybe 1,000-1,500' more thats the most outrages

leagle rocket I've done, don't even ask about our radar

shots they looked as big as a cruise missle but were the size

of a baseball bat.. What do those turbofans run, money wise??

I've heard of them but never laid hands on one.

[rodders47 2]

Hi pumpdoc

well these turbo fans that I used in the F-15 were just a nitro race motor with a ducted fan attached to the crank. But I did start building a TRISTAR L 1011, I used to work on the fullsize aircraft, using 3 model JET engines running on parafin( kerosene or A1 jet fuel). these engines are great but cost about $3000 us EACH complete with all the computer ECM systems etc. I never did get to finish that project though. I needed 3 of those JET engines, cost $9000.00 plus all the rest of the gear

[pumpdoc 2]

Rodders you got my wife all p**sed off, I've been holed up

in the garage messin with the toys as she calls them, I got to see up close

a 1/5 scale sedan--nasty-- looks like fun a guy had one out

last weekend at this big concrete lot that goes 300m x400m,

it was a trash transfer station and now its unused, any way

that ride smoked big time I broke out my '91 Mclaren nitro new

OFNA/PICCO Outlaw .26 37,000 claimed r's and after 3 tanks

I tried to race him in a straight line ---good thing it wasn't for

pinks I'd be out a car, I think he called it a Bergzoni or Bergon something like that 23cc motor with a Merc. CLK body I think he said he had about

1,500$ or so in it turn key

[rodders47 2]

yep Bergonzoni, same as mine. The very latest model is all alloy, costs $4,500 Aud and well looks extemely sexy !!!!

Mine has a 23 cc motor revs to 19,000 and puts out 3.4 hp. does 90 km/h on our tracks back straight. The latest model with all the good bits puts out 6.4 hp and goes like S...T off a shovel or a rat up a drain pipe LOL

Good fun mate and well the next best thing to real fullsize racing there is

I also have a 1/10th scale Nitro Tourer powered by a .12 cu in motor that revs to 47,000 rpm and runs on 15% nitro/synthetic oil / methanol. This baby does over 100 kp/h on our back straight and handles like on rails.

The Motor alone costs nearly $1000 aud has a ceramic piston with hard chrome cylinder and super high speed, very expensive ball races throughout. Puts out 1.5 hp and the car weighs 1.5 kg

work those figures out in us weights LOL power to weight ratio is very impressive