AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Dressing the props Goto page 1, 2, 3  Next          AirTalk.org Forum Index -> Planes, gliders and flying in Australia View previous topic :: View next topic   Author Message Peter and Susan Guest Posted: Wed Dec 14, 2005 9:58 am    Post subject: Dressing the props In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? Thanks Peter Cokley Back to top Stealth Pilot Guest Posted: Wed Dec 14, 2005 2:58 pm    Post subject: Re: Dressing the props On Wed, 14 Dec 2005 09:58:38 GMT, "Peter and Susan" <petanoz (AT) hotmail (DOT) com> wrote: Quote: In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? Thanks Peter Cokley for wooden props the prop is left horizontal. this prevents any free moisture in the wood from percolating to the lower blade and throwing the prop out of balance. for metal props they are sometimes left vertical to prevent birds from resting on them, usually though they get left horizontal because it looks right. 3, 4, 5, 6 bladed props are usually too high to reach and get left where they are. stealth pilot Back to top John Mackesy Guest Posted: Wed Dec 14, 2005 10:59 pm    Post subject: Re: Dressing the props Peter and Susan wrote: Quote: In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? Thanks Peter Cokley In the 4-engined ASW type I was associated with, my preference was to leave the props wherever they stopped. When the aircraft was in the hangar for maintenance, it was usual to to turn the (3-bladed, 14' 6" dia square-ended) props so that they presented as a 'Y' - that way, no one was liable to walk into a head high sharp steel edge. *Some people* liked to see the props 'right dressed' when the aircraft was parked, but if I saw an aircraft like this I was inclined to turn a couple of the props and upset the effect. In any event, it's not a good practice to walk through propeller arcs. John Mackesy Back to top matt weber Guest Posted: Thu Dec 15, 2005 2:20 am    Post subject: Re: Dressing the props On Wed, 14 Dec 2005 22:58:47 +0800, Stealth Pilot <tailwind (AT) iinet (DOT) net.au> wrote: Quote: On Wed, 14 Dec 2005 09:58:38 GMT, "Peter and Susan" [email]petanoz (AT) hotmail (DOT) com[/email]> wrote: In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? Thanks Peter Cokley for wooden props the prop is left horizontal. this prevents any free moisture in the wood from percolating to the lower blade and throwing the prop out of balance. for metal props they are sometimes left vertical to prevent birds from resting on them, usually though they get left horizontal because it looks right. Much better reason for leaving them Horizontal. You and various other runway bits don't run into them. If they are horizontal, whatever it is, won't fit under the wing either. For various reasons, people are more likely not to notice vertical obstacles.... Back to top prep@prep.synonet.com Guest Posted: Thu Dec 15, 2005 8:01 am    Post subject: Re: Dressing the props Stealth Pilot <tailwind (AT) iinet (DOT) net.au> writes: Quote: for metal props they are sometimes left vertical to prevent birds from resting on them, usually though they get left horizontal because it looks right. Having the balades vertical also makes them a bit harder to walk into in a dark hangar... Don't ask how I know. -- Paul Repacholi 1 Crescent Rd., +61 (0 9257-1001 Kalamunda. West Australia 6076 comp.os.vms,- The Older, Grumpier Slashdot Raw, Cooked or Well-done, it's all half baked. EPIC, The Architecture of the future, always has been, always will be. Back to top --user-- Guest Posted: Thu Dec 15, 2005 10:41 am    Post subject: Re: Dressing the props "GB" <g.b (AT) sonicresearch (DOT) mailme.org> wrote Quote: John Mackesy <mack (AT) melbpc (DOT) org.au> wrote in news:dnq4jp$nas$1 (AT) possum (DOT) melbpc.org.au: parked, but if I saw an aircraft like this I was inclined to turn a couple of the props and upset the effect. For what it's worth, I've never been comfy with moving props, ever. I remember hairs rising on the back of my neck when a pre-PPL instructor rotated a prop to pre-flight it one day, and just last weekend I came across a <2cc model engine with prop attached, and I couldn't even bring myself to swing that! I still have the scars from my model aero days :) Flick starting a 6.5 cc racing motor with a toothpick prop, on 60% nitro......... Quote: Not sure where I picked that up from, but I did. In any event, it's not a good practice to walk through propeller arcs. "Does Jack Newton swim in circles?" G -- "When all you have is a flamethrower, everything looks like a speed camera." (Peter) Back to top RT Guest Posted: Thu Dec 15, 2005 11:20 am    Post subject: Re: Dressing the props "Peter and Susan" <petanoz (AT) hotmail (DOT) com> wrote Quote: In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? S'interesting! At the moment all 6 other respondents have referred to the disposition of the blades as 'dressing'. However, my understanding of the term 'dressing' from the 1960's on was that it referred to the removal of damaged material from the leading edge of the blades. Haven't seen the picture under discussion Back to top JD Guest Posted: Thu Dec 15, 2005 7:27 pm    Post subject: Re: Dressing the props GB wrote: Quote: John Mackesy <mack (AT) melbpc (DOT) org.au> wrote in news:dnq4jp$nas$1 (AT) possum (DOT) melbpc.org.au: parked, but if I saw an aircraft like this I was inclined to turn a couple of the props and upset the effect. For what it's worth, I've never been comfy with moving props, ever. I remember hairs rising on the back of my neck when a pre-PPL instructor rotated a prop to pre-flight it one day, and just last weekend I came across a <2cc model engine with prop attached, and I couldn't even bring myself to swing that! Not sure where I picked that up from, but I did. In any event, it's not a good practice to walk through propeller arcs. "Does Jack Newton swim in circles?" G Having owned a plane with an inverted engine that needed to be rotated through two full turns in preflighting to make sure you did not have a hydraulic lock, I have had a lot of practice at this, but also have a very healthy respect for them. Also frequently have had to hand start both this engine and others - wooden prop trailing edges are a lot more comfortable to handle! JD Back to top John Mackesy Guest Posted: Fri Dec 16, 2005 1:31 am    Post subject: Re: Dressing the props (quote) 'For what it's worth, I've never been comfy with moving props, ever.' Good point. Then again, a stone cold R3350 with no fuel pressure, ignition off and with low tension magneto ignition being turned by a weedy (then) 65 kg airman isn't likely to take much notice. I've also 'pulled through' R1830's on Dakotas, (good exercise on a subzero morning) as did many of my colleagues. It's perfectly safe, though not advisable on a hot engine. John Mackesy Back to top --user-- Guest Posted: Fri Dec 16, 2005 3:22 am    Post subject: Re: Dressing the props "John Mackesy" <mack (AT) melbpc (DOT) org.au> wrote Quote: (quote) 'For what it's worth, I've never been comfy with moving props, ever.' Good point. Then again, a stone cold R3350 with no fuel pressure, ignition off and with low tension magneto ignition being turned by a weedy (then) 65 kg airman isn't likely to take much notice. I've also 'pulled through' R1830's on Dakotas, (good exercise on a subzero morning) as did many of my colleagues. It's perfectly safe, though not advisable on a hot engine. John Mackesy Didn't some of these big radials need to be pulled though by hand before they were started? To clear the oil that drained into the bottom cyclinders I was told. Back to top Pits Guest Posted: Fri Dec 16, 2005 3:28 am    Post subject: Re: Dressing the props --user-- wrote: Quote: "John Mackesy" <mack (AT) melbpc (DOT) org.au> wrote in message news:dnt1te$b6h$1 (AT) possum (DOT) melbpc.org.au... (quote) 'For what it's worth, I've never been comfy with moving props, ever.' Good point. Then again, a stone cold R3350 with no fuel pressure, ignition off and with low tension magneto ignition being turned by a weedy (then) 65 kg airman isn't likely to take much notice. I've also 'pulled through' R1830's on Dakotas, (good exercise on a subzero morning) as did many of my colleagues. It's perfectly safe, though not advisable on a hot engine. John Mackesy Didn't some of these big radials need to be pulled though by hand before they were started? To clear the oil that drained into the bottom cyclinders I was told. You were told correctly Back to top Stealth Pilot Guest Posted: Fri Dec 16, 2005 7:22 am    Post subject: Re: Dressing the props On Thu, 15 Dec 2005 21:20:46 +1000, "RT" <notr.thomas (AT) nowhere (DOT) com.au> wrote: Quote: "Peter and Susan" <petanoz (AT) hotmail (DOT) com> wrote in message news:newscache$qpfhri$1yq$1 (AT) elise (DOT) onthenet.com.au... In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? S'interesting! At the moment all 6 other respondents have referred to the disposition of the blades as 'dressing'. However, my understanding of the term 'dressing' from the 1960's on was that it referred to the removal of damaged material from the leading edge of the blades. Haven't seen the picture under discussion true but I couldnt see a novice knowing that. Back to top Ron Cuskelly Guest Posted: Sat Dec 17, 2005 12:57 am    Post subject: Re: Dressing the props JW² Thanks for the kind words about my photo. I assume you mean this one? http://www.adastron.com/squawkid/h1vhbrf.htm The captain of VH-BRF on that occasion was Lloyd Maundrell and he would have deliberately dressed the props like that for reasons other than making Ron's photo look good ;-) As I understand it, with flying boats, a three-bladed prop is dressed like an inverted Y to provide maximum clearance for small boats to pass under the wing. With landplanes it's the opposite. A three-bladed prop is dressed like a Y (with the lower blade vertical) so that engineering work stands can pass down either side of the engine. "Dressing props" does have two meanings. As others have stated, it also refers to blending out chips in metal blades. Cheers Ron JW² wrote: Quote: Stealth Pilot wrote: On Wed, 14 Dec 2005 09:58:38 GMT, "Peter and Susan" [email]petanoz (AT) hotmail (DOT) com[/email]> wrote: In the recent discussion regarding AVIS pictures, there was the remark that the props of the plane in the picture were not dressed. I assume that means the props were not in some special arrangement? What is that special arrangement, please? Thanks Peter Cokley ==== Reference Ron Cuskelly's beautiful picture of VH-BRF on the lagoon at Lord Howe Is., I have often admired the dressage of the props. Specially done, Ron? JW² ==== Back to top Peter and Susan Guest Posted: Sat Dec 17, 2005 1:15 am    Post subject: Re: Dressing the props "Ron Cuskelly" <ron (AT) adastron (DOT) com> wrote Quote: As I understand it, with flying boats, a three-bladed prop is dressed like an inverted Y to provide maximum clearance for small boats to pass under the wing. Cheers Ron Ron, how were the props dressed on the flying boat? Looking at the picture, perhaps the props were too high for a boat underneath so either a walk on the wing or using the engine? I am grateful for the quality of the responses to my original question which started this thread!! Thanks one and all!! Cheers Peter Cokley Back to top xxxxxxx Guest Posted: Sat Dec 17, 2005 2:18 am    Post subject: Re: Dressing the props GB wrote: Quote: John Mackesy <mack (AT) melbpc (DOT) org.au> wrote in news:dnq4jp$nas$1 (AT) possum (DOT) melbpc.org.au: parked, but if I saw an aircraft like this I was inclined to turn a couple of the props and upset the effect. For what it's worth, I've never been comfy with moving props, ever. I remember hairs rising on the back of my neck when a pre-PPL instructor rotated a prop to pre-flight it one day, and just last weekend I came across a <2cc model engine with prop attached, and I couldn't even bring myself to swing that! You don't do "pre-flight" inspections I gather? 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