It will no doubt climb better, it probably will go some faster but you can't expect extremely high cruise speeds because top speed is more a factor of the airframe drag, etc. To wit, the retractable gear Ercoupe, how much faster did it go than the ordinary Ercoupe?
Grover On Wed, 21 Apr 1999 09:30:57 EDT [EMAIL PROTECTED] writes: >Hello Group, > >Some thoughts about big engines... > >Someone may be able to answer this question..... Just how fast can the >coupe >go without falling apart ?? > >The Never Exceed Speed is 144 mph.... and coupes without aeliron >weights, >(and excess play in the control system), may develop aeliron flutter >at a >much lower airspeed - and come apart..... > >So, I think I am right that the 0-200 STC limits the engine output so >that >these speeds cannot be attained - by limiting the prop that can be >legally >used..... > >Now we try to evaluate the 120 HP Franklin engine STC.....More power, >more >speed .... Will it be limited to safe airspeeds by the approval of >proper >props??? > >Well, I can see benefits from better climb rates, etc., but do think >this may >lead to folks using higher airspeeds --approaching the critical limit >(s), >and airframe failures. > >Now, I know that all pilots will observe the critical limits of their >particular airplane, (Ercoupe or other type) and never exceed >them..... so >all will be OK.. > >Yeah! > >Yes, I have thought of alternative engines for the coupe, and find >that a >properly operating Continental 75/85/90 does just fine. An 0-200 might >be an >excellent alternative on rebuild as long as you observe the prop >choice and >airspeed limits.... > >Fred Weick spoke about trying a 125 hp Lycoming with a particular prop >they >were testing ---getting excellent higher airspeeds..... ( but, I am >sure >using the aelrion weights in place to prevent flutter)......"---it did >about >150 mph with that Propeller-engine combination----"(pg 181,The >Ercoupe, A >touch of Class" - quoted from International Ercoupe Association >Newsletter, >September - October, 1974.) > >So, who knows, the Coupe may stay together, with no problem; and as >long as >the extra power is controlled for better climb rates, all should be >OK. > >Guess, I will stay happy with the original engine. Now, when I need to > >overhaul..... who knows. > >Fly Safe - Have Fun >Carefully! > >Harry >93530 >Blacksburg, Va. > > > ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]
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