For the 1320 STC the aircraft must be in compliant with A-718 so therefore no additional cooling baffles needed.
Kevin1 --- In [email protected], William R. Bayne <ercog...@...> wrote: > > > The question (as I interpret it) seems an important one inasmuch as > the answer essentially addresses the "airworthiness" of a given > Ercoupe, with or without said baffles. Always remember I'm NOT a > mechanic...I do have considerable engineering and legal experience > reading and interpreting applicable specifications necessary to the > supervision and inspection of installations by others. > > As previously stated here, there are NO special cooling baffles > involved with a 415-C, or 415-CD with a 75 hp engine. > > If one upgrades the original C-75 to C-85 spec. for operation at the > 1400 lb. gross wt. of the 415-D under Type Certificate 787, then the > extra cooling baffles around the oil tank shown in the Ercoupe Parts > Manual, Fig. 17, Items 13, 14 & 15 are required (as explained in the > description of these items on p. 23). > > Since the 1320 lb. STC was approved using data from the 415-D Model > under TC 787, logic would seem to dictate that flight operations at > the higher weight would require the extra cooling baffles that are > required on the 415-D when a C-85 is fitted. > > I seem to recall someone knowledgeable having previously commented > that there was no actual flight testing associated with the review > and approval of said STC. It may be that the actual wording of the > STC paperwork does not specifically require the installation of these > baffles (I don't have a copy for reference, but would appreciate a > copy if anyone has the time and the inclination ;<). > > It is likely demonstrable that at 1320 lbs. with "standard day" > conditions the extra baffles are not necessary to meet applicable > cooling criteria, but that's a potential financial mine field in > today's regulatory climate probably best not entered. > > Hope this helps, > > WRB > > -- > > > On Aug 27, 2010, at 16:05, Ronin Sensei wrote: > > > > > > > > > > > Can anybody direct me to, or send me, a detailed diagram and > > instructions for installing the cooling baffles on a 1320 lb > > Coupe? (or a D model, since they are the same, I understand). > > This is driving my A&P crazy. > > Any help will be appreciated. > > Dave Winters >
