My research on the subject of Corvair crankshafts indicates, but has not proven, that nitrided crankshafts offer significant improvements in fatigue resistance and wear resistance. Further research indicates that ion nitriding is the superior method of nitriding for Corvair crankshafts.
At my request, Nitron has agreed to provide ion nitriding services to people building Corvair engines for aircraft use. Nitron is offering this service as a Good Samaratin gesture because we believe that this is a significant risk reduction to builders. It is difficult to quantify the improvement without large scale testing. Due to the unique nature of each Corvair crankshaft, the improvement will always vary. Awaiting large scale testing would deny individual builders access to a process believed to be an improvement.
Having the crankshaft nitrided is certainly not a guarantee against breakage. Most aircraft crankshafts are nitrided, and even purpose designed certified quality nitrided aircraft crankshafts break.
Nitron will perform only the ion nitride service on a crankshaft. Nitron is not equipped or trained to evaluate the airworthiness of crankshafts. An unairworthy crankshaft, even one with an obvious flaw, sent to Nitron, will merely become an unairworthy crankshaft which is nitrided. The final and only evaluation of airworthiness will always fall in the hands of the builder, and the pilot in command of the aircraft on the day it is operated. The builder relies solely on his own skill and judgment in the evaluation of the crankshaft, and is solely responsible for its use. It is still the responsibility of the builder to operate the crank with good judgement and exercise every reasonable opportunity to reduce the stress on the part.
The experimental nature of builders' projects means that each and every one is a unique aircraft. It is impossible for Nitron or any other service provider to have control over how the crankshaft was manufactured, used, modified, installed, and operated. Therefore, service providers cannot be held liable for its operation.
In consideration of the covenants and conditions stated, Buyer agrees to hold Nitron harmless and indemnify Nitron as follows:
Dated this _________ day of _______________, 20________.
Builder Signature ________________________________________________________________________
Name and Address (please print)____________________________________________________________
Phone Number ________________________________________________________________________
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