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Modifying certified to experimental in Aus.-auto engining and avionics
Evening all.
I started a similar thread a while ago, but have done some more reasearch since. I will be sending this post to SAAA, to see what they think. As I understand it, you may put an auto engine into a certified aircraft in australia, and the legislation states that a request to do so must be given. SAAA seem to deal with substantial usage of 21.191(g) in relation to amateur buuilt aircraft, that are major portion built. In this case, the aircraft is built as a certified aircraft, an only the propulsion is experimental. No problems. This does not apply here. I wish to deal with 21.191(a) reasearch and development. Under AC 21.1 -7.1.3 allows for (and specifically states) allows for R & D on commercially or amateur built aircraft. Under this section, the CofA is valid for only one year, or earlier if cancelled. This can be renewed for further development. After the completion of a R&D phase, the owner may apply for a 'special certificate of airworthiness-experimental' certificate under 21.191(i), which allows for private use of a previously certificated aircraft under 21.191(a). This is then valid for an unlimited period, as per normal procedures for amateur built aircraft. Also, CASA or an AP (Authorised Person) may issue this certificate under instrument as stated in the legislation. Does this instrument state specifically for authorisation under 21.191(g), or does it include all of 21.191 (a)-(i)? (Which in this case I think it would.) (Any SAAA APs out there with an input?) An example of this would be in the change of say a C172, to use a Holden alloytec engine with a reduction drive. This engine develops about 190 something Kw of power, unmodified. Other engine/aircraft combinations could also be used, ie:subaru EA81unmodified in a 152, EA81modified in a warrior/archer, VW in a 150. Other things would be the use of a glass cockpit in an aircraft. Remove the current instrruments and replace with say, for example the Dynon EFIS 10A, and there engine management system. This removes instrument clutter, allows for redundancy, as the screens and inputs are interchangable. (Some Std instruments would be kept for safety sake), but the sale of the other instruments would subsidise the cost of the EFIS, $2100.00 USD. at the moment). Yes I know there will be weight and balance differences, but am seeing aviation dying due to the high cost of aircraft parts. There are also other benefits, such as no shock cooling due to liquid cooling, auto engines are more tolerant of bad fuel, smoother running, easier starting. Please don't flame me on this one. I am looking at opinions, and whether I'm going down the right track. Thanks in advance for any replies. Rob Melbourne Australia. |
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