Re: Pietenpol-List: Pietenpol Propellers

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Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: "Ed G."
Harvey,It seems your Franklin engine is rated 80 hp at 2500 rpm. My Continental C 85 israted 85 hp at 2575 rpm, which makes them reasonably close.I get about 2450 rpm full throttle static and about 2550 rpm in level flight, fullthrottle. If the airplane were cleaner aerodynamically, I would exceed therated rpm of 2575 quite easily.The propeller I am currently using is a Colin Walker 72x43 wooden prop. Unfortunately,Colin Walker (of Surrey, British Columbia) has retired. However, thereis a rumour that somebody on Vancouver Island is going to take over his business.Colin made excellent propellers for many years and, if this is true, it isgood news. I suspect that a 72x44 CW propeller would be just right for my airplane,but the 72x43 I have is OK. (Remember, a "43 inch pitch" number on onepropeller may not match the same number on another make!)Getting the optimum fixed pitch wooden propeller for your airplane is a gamble.An aeronautical engineer friend said that usually a lot of different propellersneed to be tested to find the best one, but this isn't an option for mostof us. He also told me that Pietenpols don't do as well with certified productionprops as with custom-built ones. Metal props can be re-pitched; wooden propsdon't lend themselves to this kind of "tweaking". A ground-adjustable prop(eg. Warp Drive) pretty-well eliminates the gamble factor, but some don't liketheir appearance on a Pietenpol. You could go that route, as others have.If you can borrow a Sensenich 72CK 42 or 72CK44 for trials, you would then getan idea what prop you need for your particular airplane/engine combination. Eitherof these should be reasonably close to your requirement--at least for testing.Graham (Pietenpol CF-AUN) ________________________________________________________________________________
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> Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By:
Borrowing a prop for a Franklin will probably be difficult. The AC 176 series Franklin's prop flange has a 4" X 6 X 3/8" bolt pattern..It is fairly unique to this engine. Believe it or not they were in production before Continental or Lycombing ( That's what I read anyway) so they don't use a SAE pattern..I guess they just made one up that looked good on paper...Ed Grentzer>From: "Graham Hansen" >Reply-To: pietenpol-list(at)matronics.com>To: >Subject: Re: Pietenpol-List: Pietenpol Propellers>Date: Wed, 17 Aug 2005 15:57:23 -0600>>Harvey,>>It seems your Franklin engine is rated 80 hp at 2500 rpm. My Continental C >85 is rated 85 hp at 2575 rpm, which makes them reasonably close.>>I get about 2450 rpm full throttle static and about 2550 rpm in level >flight, full throttle. If the airplane were cleaner aerodynamically, I >would exceed the rated rpm of 2575 quite easily.>>The propeller I am currently using is a Colin Walker 72x43 wooden prop. >Unfortunately, Colin Walker (of Surrey, British Columbia) has retired. >However, there is a rumour that somebody on Vancouver Island is going to >take over his business. Colin made excellent propellers for many years and, >if this is true, it is good news. I suspect that a 72x44 CW propeller would >be just right for my airplane, but the 72x43 I have is OK. (Remember, a "43 >inch pitch" number on one propeller may not match the same number on >another make!)>>Getting the optimum fixed pitch wooden propeller for your airplane is a >gamble. An aeronautical engineer friend said that usually a lot of >different propellers need to be tested to find the best one, but this isn't >an option for most of us. He also told me that Pietenpols don't do as well >with certified production props as with custom-built ones. Metal props can >be re-pitched; wooden props don't lend themselves to this kind of >"tweaking". A ground-adjustable prop (eg. Warp Drive) pretty-well >eliminates the gamble factor, but some don't like their appearance on a >Pietenpol. You could go that route, as others have.>>If you can borrow a Sensenich 72CK 42 or 72CK44 for trials, you would then >get an idea what prop you need for your particular airplane/engine >combination. Either of these should be reasonably close to your >requirement--at least for testing.>>Graham (Pietenpol CF-AUN)>________________________________________________________________________________
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Re: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By:> "Graham Hansen"
Graham,The franklin will have a different bolt circle diameter so the props you mentionwill not fit.if he is doing a sensenich, it needs to be a W72F42Chris>
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RE: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: harvey.rule(at)bell.ca
Chris and Ed,Harvey has an adapter on the Franklin which allows him to use the Continental props. It had been machined for that purpose.I saw it in May when I was at Ottawa and, at that time, a McCauley metal prop (for a Continental) was fitted. His friend, an Aircraft Maintenance Engineer (as I am), told him a wooden prop would be safer with that adapter. I agree with his engineer.Harvey bought his GN 1 in an advanced state of construction and all this stuff was done by the builder.It would be better if he could find a wooden Sensenich for the Franklin, but I think that is not too likely. A custom-built prop to fit the Franklin would, if he decides to go that route, allow him to ditch the adapter.Graham ________________________________________________________________________________Subject: RE: Re: Pietenpol-List: Pietenpol PropellersDate: Thu, 18 Aug 2005 07:19:39 -0400
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RE: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: harvey.rule(at)bell.ca
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RE: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: harvey.rule(at)bell.ca
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Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: "Graham Hansen"
Harvey,It is possible that Preceptor discouraged you from using a Warp Drive propelleron your N3 Pup because it had a direct drive two cylinder 4-stroke engine. Withonly two cylinders, the power impulses are going to be widely spaced. A friendhas an N3 Pup with the two cylinder 40 hp Mosler which has relatively highcompression and lots of "snap".I have never heard of such a restriction on a four cylinderdirect drive engine and know of quite a few four cylinder Continentals (A 65, C85, C90 & O200) that seem to be successfully mated to the Warp Drive props. Iwas thinking of getting a Warp Drive prop for my 65 hp Wag-A-Bond and you areinstilling some doubts in my mind.Has anyone on the list any information on this? Graham (Pietenpol CF-AUN)________________________________________________________________________________
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RE: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: harvey.rule(at)bell.ca
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Pietenpol-List: Pietenpol-List Digest: 5 Msgs - 09/03/05

Post by matronics »

Original Posted By: Tim Willis
Hi Tim,Welcome to the group, sounds like you are set up to have some fun. I myself am relatively new to the group and my Piet doesn't look much like an airplane yet. Given time it will, just have to keep plugging away at it bit by bit and one day it will be finished.As you have already noticed, this group has a wealth of information that the members are happy to share with other Piet enthusiasts. So, if you have a question, fire away, someone can probably solve your problem.I think the most important thing is to just keep at it, sometimes your progress will be good, other times not so good, but any progress is a learning experience................keep on Pieting !!RegardsMark SJapan....Typhoon # 14 passing by.----- Original Message -----
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Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: hans.vander.voort(at)alfalaval.com
27, 2005) at 09/06/2005 09:51:30 AMTim,Welcome to the Pietenpol club.Don't forget to get your tailwheel endorsement.Or better yet try to get your PPL in a tail dragger.Hans________________________________________________________________________________Subject: Re: Pietenpol-List: Pietenpol Propellers
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RE: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: harvey.rule(at)bell.ca
27, 2005) at 09/06/2005 10:01:28 AMHarvey,I also bought my Prop from Tennessee prop.It is driven by a Corvair about 100 HP @ 3100 RPM (it is probably closer to70 Hp@ 2700 RPM) and the prop hub is 3 inch.The 3 inch was suggested by Tennessee prop as the best solution for that HPrange.Hans________________________________________________________________________________Subject: RE: Pietenpol-List: Pietenpol PropellersDate: Tue, 6 Sep 2005 10:05:31 -0400
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>>> Re: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: Sncliffe(at)aol.com
Hi Harvey...I ordered a 3 1/2" thick hub because My Franklin crankshaft has a 3 1/2" long snout on it..Steve at Tennessee Props said he alread had a 3 5/8" thich blank made up so that's what I ended up getting....Ed Grentzer>From: Harvey Rule >Reply-To: pietenpol-list(at)matronics.com>To: pietenpol-list(at)matronics.com>Subject: Re: Pietenpol-List: Pietenpol Propellers>Date: Mon, 05 Sep 2005 18:54:49 -0400>>>>I'll be ordering from Tennessee but one of the criteria of ordering is to >know the hub thickness.I have all the rest of the info but this.Could >someone inform me of this piece of data,thanks.>>>>>>>Harvey ..They both have on line order forms on their web sites at; >>www.sensenich.com and>>www.tn-prop.com..I bought from Tennessee because their price was half the >>price of a Sensenich uncertified prop without the brass leading edge..I >>set out to buy a Culver prop and found that Tennessee had bought them >>out...They have the template for the older Franklin hub..Which ever way >>you go make sure you stress your bolt pattern to them..The PLZ Franklins >>use an SAE pattern and when you say Franklin that's what they seem to >>think you need. I got mine several months ago and the workmanship in it is >>top notch and it has a nice classic shape to it...Ed Grentzer>>>>>>>From: harvey.rule(at)bell.ca>>>Reply-To: pietenpol-list(at)matronics.com>>>To: pietenpol-list(at)matronics.com>>>Subject: RE: Re: Pietenpol-List: Pietenpol Propellers>>>Date: Thu, 18 Aug 2005 07:19:39 -0400>>>>>>>>>That's correct;the man I bought it from told me that he didn't think the>>>adaptor set up was all that safe and he felt that it was too heavy with>>>the metal prop.So much so,that he felt there was a danger of tipping>>>over easily.He suggested that I switch to a wooden prop and the AME that>>>is helping me said that a wooden prop would also be smoother.So I'm in>>>the market for a wood prop with either a 72X42 or 72X43 for the 80hp.I>>>have sent out letters to both Sensenich and Tennessee and have received>>>no info back.I believe that they want all the particulars with regards>>>to bolt pattern etc.before they will get back to me.In one situation you>>>have to fill out an order form first.So I have to wait till I can get>>>back to the aircraft to glean all that info.I will be selling that>>>McCauley prop if anyone is interested.And the adaptor as well.With a>>>wood prop on I may be able to reinstall the starter.That ,however may>>>just put me right back where I started with the danger of tipping.With>>>the starter,the metal prop and adaptor on it will tip over unless I tie>>>a rock to the rear,HAHAHA!I'd probably land up in the Redeau River eh>>>guys!>>>>>>-----Original Message----->>>From: owner-pietenpol-list-server(at)matronics.com>>>[mailto:owner-pietenpol-list-server(at)matronics.com] On Behalf Of Graham>>>Hansen>>>Sent: August 17, 2005 9:38 PM>>>To: pietenpol-list(at)matronics.com>>>Subject: Re: Re: Pietenpol-List: Pietenpol Propellers>>>>>>>>>>>>Chris and Ed,>>>>>>Harvey has an adapter on the Franklin which allows him to use the>>>Continental props. It had been machined for that purpose.>>>>>>I saw it in May when I was at Ottawa and, at that time, a McCauley metal>>>>>>prop (for a Continental) was fitted. His friend, an Aircraft Maintenance>>>>>>Engineer (as I am), told him a wooden prop would be safer with that>>>adapter.>>>I agree with his engineer.>>>>>>Harvey bought his GN 1 in an advanced state of construction and all this>>>>>>stuff was done by the builder.>>>>>>It would be better if he could find a wooden Sensenich for the Franklin,>>>but>>>I think that is not too likely. A custom-built prop to fit the Franklin>>>would, if he decides to go that route, allow him to ditch the adapter.>>>>>>Graham>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>________________________________________________________________________________
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> Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: "Graham Hansen"
> To: > Subject: Re: Pietenpol-List: Pietenpol Propellers> > Harvey,> > It seems your Franklin engine is rated 80 hp at 2500 rpm. My Continental C 85is rated 85 hp at 2575 rpm, which makes them reasonably close.> > I get about 2450 rpm full throttle static and about 2550 rpm in level flight,full throttle. If the airplane were cleaner aerodynamically, I would exceed therated rpm of 2575 quite easily. > > The propeller I am currently using is a Colin Walker 72x43 wooden prop. Unfortunately,Colin Walker (of Surrey, British Columbia) has retired. However, thereis a rumour that somebody on Vancouver Island is going to take over his business.Colin made excellent propellers for many years and, if this is true, itis good news. I suspect that a 72x44 CW propeller would be just right for myairplane, but the 72x43 I have is OK. (Remember, a "43 inch pitch" number on onepropeller may not match the same number on another make!)> > Getting the optimum fixed pitch wooden propeller for your airplane is a gamble.An aeronautical engineer friend said that usually a lot of different propellersneed to be tested to find the best one, but this isn't an option for mostof us. He also told me that Pietenpols don't do as well with certified productionprops as with custom-built ones. Metal props can be re-pitched; wooden propsdon't lend themselves to this kind of "tweaking". A ground-adjustable prop(eg. Warp Drive) pretty-well eliminates the gamble factor, but some don't liketheir appearance on a Pietenpol. You could go that route, as others have.> > If you can borrow a Sensenich 72CK 42 or 72CK44 for trials, you would then getan idea what prop you need for your particular airplane/engine combination.Either of these should be reasonably close to your requirement--at least for testing.> > Graham (Pietenpol CF-AUN) > > > ________________________________________________________________________________
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> Re: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By: Kenneth Heide
>>>That's correct;the man I bought it from told me that he didn't think the>adaptor set up was all that safe and he felt that it was too heavy with>the metal prop.So much so,that he felt there was a danger of tipping>over easily.He suggested that I switch to a wooden prop and the AME that>is helping me said that a wooden prop would also be smoother.So I'm in>the market for a wood prop with either a 72X42 or 72X43 for the 80hp.I>have sent out letters to both Sensenich and Tennessee and have received>no info back.I believe that they want all the particulars with regards>to bolt pattern etc.before they will get back to me.In one situation you>have to fill out an order form first.So I have to wait till I can get>back to the aircraft to glean all that info.I will be selling that>McCauley prop if anyone is interested.And the adaptor as well.With a>wood prop on I may be able to reinstall the starter.That ,however may>just put me right back where I started with the danger of tipping.With>the starter,the metal prop and adaptor on it will tip over unless I tie>a rock to the rear,HAHAHA!I'd probably land up in the Redeau River eh>guys!>>-----Original Message----->From: owner-pietenpol-list-server(at)matronics.com>[mailto:owner-pietenpol-list-server(at)matronics.com] On Behalf Of Graham>Hansen>Sent: August 17, 2005 9:38 PM>To: pietenpol-list(at)matronics.com>Subject: Re: Re: Pietenpol-List: Pietenpol Propellers>>>>Chris and Ed,>>Harvey has an adapter on the Franklin which allows him to use the>Continental props. It had been machined for that purpose.>>I saw it in May when I was at Ottawa and, at that time, a McCauley metal>>prop (for a Continental) was fitted. His friend, an Aircraft Maintenance>>Engineer (as I am), told him a wooden prop would be safer with that>adapter.>I agree with his engineer.>>Harvey bought his GN 1 in an advanced state of construction and all this>>stuff was done by the builder.>>It would be better if he could find a wooden Sensenich for the Franklin,>but>I think that is not too likely. A custom-built prop to fit the Franklin>would, if he decides to go that route, allow him to ditch the adapter.>>Graham>>________________________________________________________________________________Date: Thu, 18 Aug 2005 11:29:55 -0700 (PDT)
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>> RE: Re: Pietenpol-List: Pietenpol Propellers

Post by matronics »

Original Posted By:>> owner-pietenpol-list-server(at)matronics.com
>>>>>> That's correct;the man I bought it from told me that he didn't think the>> adaptor set up was all that safe and he felt that it was too heavy with>> the metal prop.So much so,that he felt there was a danger of tipping>> over easily.He suggested that I switch to a wooden prop and the AME that>> is helping me said that a wooden prop would also be smoother.So I'm in>> the market for a wood prop with either a 72X42 or 72X43 for the 80hp.I>> have sent out letters to both Sensenich and Tennessee and have received>> no info back.I believe that they want all the particulars with regards>> to bolt pattern etc.before they will get back to me.In one situation you>> have to fill out an order form first.So I have to wait till I can get>> back to the aircraft to glean all that info.I will be selling that>> McCauley prop if anyone is interested.And the adaptor as well.With a>> wood prop on I may be able to reinstall the starter.That ,however may>> just put me right back where I started with the danger of tipping.With>> the starter,the metal prop and adaptor on it will tip over unless I tie>> a rock to the rear,HAHAHA!I'd probably land up in the Redeau River eh>> guys!>>>> -----Original Message-----
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