Shaun Walsh

I do like to be generous on the power/weight ratio? on the basis that it's easy to throttle back but if you ever need more power and it's not there then you can have problems. But you are right, 70W/lb would give you a flyable model. I looked around for suitable brushed ESCs and the Hobbyking ones you found were the only suitable ones I found too. And you're right about the availability of Speed 600 motors too!

Alternatively if the speed 600 motors are a tight fit in the nacelles then a couple of 2834 motors would give a bit less but perfetly adequte power.

I would go brushless, its getting harder to source ESCs for large brushed motors and brushless motors have a much better power to weight ratio. Assuming a total mass of approx 5 lbs and a requirement of 120 watts/lb gives a total of 600 watts or 300 watts per motor. The Graupner speed 600 has a diameter of 36mm so a pair of 3535 outrunners would be about right, you would have to select the correct Kv value for the size of prop required. 3535 motors Lets assume you go for the 3535-1090. Putting the figures into eCalc and with a 10x5 3 blade prop each motor draws a max of approx 25 amps producing a static thrust of about 1300g each. With 2 motors running on a single 3s 4400 mAh battery you should get around 5 minutes flying, two 3000 mAh 3s batteries should give around 7 minutes flying.

Taco

"This is the first time I have come across the use of a Taco on an electric motor" WARNING, do not apply Mexican food to electric motors! ?

"I do wish someone would start kitting it again! It was a far better trainer than most of today's models, and the quality of the original Veron kits was superb!" You mean like this? Veron Robot kit

Downloaded it again this morning, it's now sorted.

Not sure if the contacts are the same shape but might be worth a try. Battery box Or cut out the old box from the TX back and glue the new one in, a bit drastic though.

You would normally charge at 1c so a 4000mAh battery would charge at 4 amps. How long it takes to charge depends upon how much charge was in it to start. Assuming 75% of capacity has been used it should take about 45 mins to an hour depending upon how gently the charger puts the last bit of charge into the battery.

A very good point. Cost of a model much more than the cost of a new battery.

That will partly depend upon the lowest voltage at which receiver will operate. So what is the receiver make and model?

As the Ruckus is based on the Riot I would expect it to be better built than the Acrowot and heavier. I would probably benefit from the same motor/esc upgrade I made to my Riot. The Foam-e Wots are quite lightly built and float but the Ruckus/Riot have more momentum.

try eBay, got a replacement switch for my Spektrum DX6 from someone who was breaking a failed TX for parts.

Are you sure there is no load, have you disconnected the pushrod or removed the servo arm. Digital servos often buzz if there is a slight load around the centre point but should be quiet if the load is removed.

Which model servo?

I wouldn't change the dihedral. Is the COG correct? What motor/prop combination is fitted. Does the rolling reduce if you throttle down? I have seen a model do this before, vastly overpowered KK Outlaw would oscillate madly around the roll axis until it was flying at speed or throttled down, caused by the torque produced by a large motor swinging a big prop.

Before retirement, one of the pieces of equipment I was responsible for was an ultracentrifuge, 100,000 rpm in a sealed vacuum chamber producing 800,000xg. The rotors were machined from solid Titanium and had a limited service life after which you used them at your own risk (we decommissioned them!) the rotors cost more than £10k each. The vacuum chamber was half inch thick steel and the whole thing was epoxied to the floor just in case a rotor failed resulting in the total destruction of the machine.

You mean like this one? Majestic Major PS Not a good idea to post your mobile number on a public forum unless you really like scammers calling you.

g meter; Spektrum G meter Next question, what value of gee constitutes an overload for that particular model and manouver ? If the wings fold, you are in an overload situation! If not, you're OK. I never rely on Velcro on the bottom of the battery to secure it from solo flight. All my batteries are either held in with one or more Velcro straps or wedged into the forward section of the fuselage where the only way out is backwards where it will only experience slightly over one G in a vertical climb.

I bought some Velcro the other day, it was a rip off!

800g, 1HP and water cooled, anyone like a challenge?

Have you tried swapping the elevator and rudder servo plugs around on the receiver, if it's still the elevator that oscillates then it's the servo that's the problem, if it's now the rudder that oscillates then the receiver or transmitter are the problem. In that case swap receivers to determine which is faulty. If nothing oscillates when you swap plugs over it was a dirty/poor connection. I had this problem and spraying the plugs and sockets with contact cleaner followed by plugging/unplugging the servo solved the problem.

You are right, just read the OP post, fell out in a loop. The battery in the Carbon Cub is underneath and held in (or not) by a velcro strap and the hatch/catch. Looks like the battery was badly secured. As I said, they have to be easily removable, preferably not that easily though

The reason why batteries are ejected from models when they crash is because they have to be easily removable. This is done either manually at the end of each flight or automatically when the model hits something immovable. From memory, fuel tank installation is usually done in a manner which means that removal is anticipated to be a rare event and so they are more securely installed. Also, from the moment you start the engine the mass of the fuel tank starts to decrease which means that towards the end of the flight there is less energy available for ejection. If the mass of my battery decreases during a flight it means that the battery is on fire and battery ejection is probably the least of my worries!

I learned on Mode 1 back in the 1970s in Essex, returning to the hobby 45 years later most of the members of my local clubs fly Mode 2 so in order to get sufficient tuition time I decided to swap modes. It was a bit difficult at first, the worst problem was cutting the throttle when I wanted up elevator ?. After 3 years I think I have got the hang of it?