Thursday, 16 September 2010

A slight technical hitch!

The 2010 UK speed championships was held on the 11/12th of September and I ran Black Knight on the Saturday afternoon. Here is a pic of the prepared car


Everything went well for the first run and I managed a speed of 151.51mph. Here is a short video. I am waiting for the better one to be delivered

http://www.youtube.com/watch?v=CB_moXZ2DTM

The next run I installed the ignitor in the rocket but it was a different type with no groove in. The groove is to allow the expanding gasses to escape. As the rocket was ignited the gasses built up inside the motor and had nowhere to go so it exploded destroying the car. Here is a pic






I am in the process or rebuilding the car with a few upgrades.

Watch this space

Cheers

Friday, 16 July 2010

Preparing for the 2010 RC Car Speed Championships

I havent been around for a while but I have been working on the car. The car is basically the same since the last run and I am optimising it for speed. I have installed a new ignition device with a remote relay to fire off the chrge to ignite the rocket. I can now fire the charge from the 3rd servo. I tested this and it works great!

I have fitted a large 3ft X type parachute that is deployed using a small charge of black powder. This has been tested and works good stopping the car almost instantly.

I have tested the car and I managed a speed of 189mph on the radar gun. This shows that that 200mph is in reach with this setup. I will be preparing the car with a fuel load and run up for 200mph for the 2010 UK speed championships on September 11/12th.

Nic Cas is also preparing a car and will be running on August 15th 2010. He is also trying for 200mph. Friday 13th of August might be a good day to try for 200mph!

I have the parts for the upgrade of the Black Knight into the Black arrow. The names are following the UK rocket program of the 1950-60s. The next design uses a 54mm rocket motor 450mm long with 40lbs of thrust for 20 seconds. I will use the original accumulator but fit 2 external N2 tanks feeding the accumulator through a regulator to deliver a steady 750psi through the burn.

The problem for the next rocket is the line of sight. This is overcome by the use of an FPV system. I have ordered a long range system and the idea is to fit a camera on the car and wear video goggles to see out of the car in real time. I will test the system by modifying the car with an electric motor and running the length of the track. The track will be a suitable 2mile runway such as Bruntingthorpe. This is planned for 2011.

I'll post some pics and vids as I get them

Cheers