Easy to follow Plans - I made the hydro in a week working 2 hours per evening - 2700kV brushless motor, 60Amp speed controller and 2000mAh LiPo battery pack (reduced from 4000mAh to save weight)
Still changing prop sizes/pitch
Click HERE to download video of the Clyde Puffer maiden voyage - 30Mb
Plans for Aircraft, Boats, Tanks, Crawler Crane and even a Duck
Ultimate Biplane Plans 3.4Mb - Collection of plans and photos and manuals for the ultimate Biplane (0.40 - 0.60 size)
Ultimate Build Slideshow - 5.5Mb
Ultimate Biplane Video 16.5 Mb - A clip of my scratch built aircraft, take off, general burn around and landing
First Run Video 6Mb - too heavy and CG too far forward
I have been working alonside crawler cranes for many years and I thought building a scale model of one would be an interesting project.
To keep things a reasonable size I decided that a model in the region of 1/20th scale was the ideal size for budget and available materials.
I searched the web for Crawlwer Crane Plans and it did not suprize me that there where none available, free or for sale. Another scratch build project. I found the full size crane that I would use for the dimesions and started measuring.
After many measurements and claculations I changed the scale to 1/21st Scale - not standard but this scale enabled the main stuts of the lattice boom to be 3mm, and I just happened to have 3mm brazing rods so the decision was made.
The Radio Control model has two servos controled by a small FM receiver
servo No.1 lowers and raises the boom through a 6:1 pulley system (the full size crane uses a 12:1 ratio)
servo No.2 Lowers and raises the hook block via a 4:1 pulley system as in the full size crane
The slew and tracks are not powered due to the small scale of the model but are made to replicate the full range of movement.
more coming soon - model not finished yet!
Click here for plans and updated photographs of the crawler crane project