X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 29 Jan 2014 07:55:41 -0500 Message-ID: X-Original-Return-Path: Received: from mail.bbsyd.dk ([89.184.128.195] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTP id 6707507 for lml@lancaironline.net; Wed, 29 Jan 2014 04:56:39 -0500 Received-SPF: none receiver=logan.com; client-ip=89.184.128.195; envelope-from=tj@yacht-pool.dk Received: from TIM (unknown [95.154.58.204]) by mail.bbsyd.dk (Postfix) with SMTP id 540123B8027 for ; Wed, 29 Jan 2014 10:56:02 +0100 (CET) X-Original-Message-ID: From: =?Windows-1252?Q?Tim_J=F8rgensen?= X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Short mount X-Original-Date: Wed, 29 Jan 2014 10:56:01 +0100 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_009E_01CF1CE0.B30EB010" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 This is a multi-part message in MIME format. ------=_NextPart_000_009E_01CF1CE0.B30EB010 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable "Tim, why do you need any mount at all? They normally come with the = kit=85. :-) there was none with my kit.... needed it for something else.... none of your business.... the dog ate it.... Hmmm, ok... It comes down to stupidity. On my part. Yes, it=B4s out = now..... I thought my engine mount would look really cool with a chrome job stuck = to it. It kinda did, but I later learned that chrome jobs do not go hand = in hand with structural steel parts, especially chrome molybdenum parts, = due to possible "hydrogen brittleness". There is no way of telling whether or not the mount is still good, but I = don=B4t want to find out the ugly way. I did, however, decide to finish the aircraft with untamed confidence in = own CG judgement skills (yes, I hacked off a perfectly good cowling for = the long mount, custom painted it with a checkered pattern and installed = short cables and wiring) and weigh it, before changing the engine mount. = I would not have liked to install another short mount only to discover = later, that I should have had a long mount.... If you are in search of a mount, buy the long one." Thank you, but no thanks! The long mount, in itself, is nothing to wish for. The (only!) good news = in my case is, that the CG is absolutely perfect with the short mount. = 360 builders, read carefully now: My setup is MKII tail (much safer and better looking :-) Outback gear (little effect on CG) No antennas in V-stab No rudder trim (but the balanced rudder still weighs a ton or so) Hyd pump behind pilot seatback Header tank Battery on firewall in passenger footwell (rudder pedals in pilot side = only) O-360-A1A engine Hartzell prop (HC-F2YR-1F with F7068-2 blades, presumably made of lead) Heavy paint job (UV primer, 2 coats of white, 2 coats of blue on bottom = half, 4 coats of clear, some of the lot wet sanded off again) Empty weight 1205 lbs. (incl. 7qts. oil, fire extinguisher, medical kit = and unusable fuel) Empty CG @ FS 23,05" Most fwd CG condition imaginable (header full, wings empty, 220 lbs = pilot, no passenger), CG @ FS 24.45. One TicTac in luggage compartment = required and kids under 220 lbs shouldn=B4t play with aircraft anyway. I = am a 250 lbs. kitten, so my most fwd CG is @ FS 25. I can only loose 28 = lbs without having to carry a TicTac. Most aft CG condition (hardly!) imaginable (header empty, wings empty, = 55 lbs. luggage, 530 lbs. pilot & passenger), CG @ FS 28,76 or 1.54" = fwd. of aft CG limit and perfectly acceptable, even with the dangerous = small tail. Short engine mounts are GREAT! The story is, of course, different for those with a 320 engine, an MT = prop and perhaps even a MKII tail. If anyone would like the full W&B worksheet, please contact me directly = and I will send it. Yes, it uses metric units; all your prayers = answered! Regards Tim Jorgensen 360MKIIOBFB 99.99% ------=_NextPart_000_009E_01CF1CE0.B30EB010 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
"Tim, why=20 do you need any mount at all? They normally come with the kit=85.=20 :-)
 
there was none with my = kit....
needed it for something = else....
none of your business....
the dog = ate=20 it....
 
Hmmm, ok... It comes down to = stupidity. On my=20 part. Yes, it=B4s out now.....
I thought my engine mount would look = really cool=20 with a chrome job stuck to it. It kinda did, but I later learned=20 that chrome jobs do not go hand in hand with structural steel = parts,=20 especially chrome molybdenum parts, due to possible "hydrogen=20 brittleness".
There is no way of telling whether or = not the mount=20 is still good, but I don=B4t want to find out the ugly way.
I did, however, decide to finish = the aircraft=20 with untamed confidence in own CG judgement skills (yes, I=20 hacked off a perfectly good cowling for the long mount, custom = painted=20 it with a checkered pattern and installed short cables and wiring) = and=20 weigh it, before changing the engine mount. I would not have liked to = install=20 another short mount only to discover later, that I should have had a = long=20 mount....
 
If you are=20 in search of a mount, buy the long one."
Thank you, but no thanks!
The long mount, in itself, is nothing = to wish for.=20 The (only!) good news in my case is, = that the CG=20 is absolutely perfect with the short mount. 360 builders, read carefully = now:
 
My setup is
 
MKII tail (much safer and better = looking=20 :-)
Outback gear (little effect on = CG)
No antennas in V-stab
No rudder trim (but the balanced rudder = still=20 weighs a ton or so)
Hyd pump behind pilot = seatback
Header tank
Battery on firewall in passenger = footwell (rudder=20 pedals in pilot side only)
O-360-A1A engine
Hartzell prop (HC-F2YR-1F with F7068-2 = blades,=20 presumably made of lead)
Heavy paint job (UV primer, 2 coats of = white, 2=20 coats of blue on bottom half, 4 coats of clear, some of the lot wet = sanded off=20 again)
 
Empty weight 1205 lbs. (incl. 7qts. = oil, fire=20 extinguisher, medical kit and unusable fuel)
 
Empty CG @ FS 23,05"
 
Most fwd CG condition imaginable = (header full,=20 wings empty, 220 lbs pilot, no passenger), CG @ FS 24.45. One TicTac in = luggage=20 compartment required and kids under 220 lbs shouldn=B4t play with = aircraft anyway.=20 I am a 250 lbs. kitten, so my most = fwd CG is @ FS=20 25. I can only loose 28 lbs without having to carry a = TicTac.
 
Most aft CG condition (hardly!) = imaginable (header=20 empty, wings empty, 55 lbs. luggage, 530 lbs. pilot & passenger), CG = @ FS=20 28,76 or 1.54" fwd. of aft CG limit and perfectly acceptable, even with = the=20 dangerous small tail.
 
Short engine mounts are = GREAT!
 
The story is, of course, different for = those with a=20 320 engine, an MT prop and perhaps even a MKII tail.
 
If anyone would like the full W&B = worksheet,=20 please contact me directly and I will send it. Yes, it uses metric = units; all=20 your prayers answered!
 
Regards
Tim Jorgensen
360MKIIOBFB 99.99%
 
 
 
 
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