Original Posted By: ""
Any one familiar with this block http://www.donovanengineering.com/Block ... k.htmlwant to know if it would hold up to the prop loads.Ken________________________________________________________________________________Date: Mon, 8 Sep 2003 10:56:36 -0500
Pietenpol-List: Model a engine blocks
Pietenpol-List: Re: Model a engine blocks
Original Posted By: "Christian Bobka"
Ken,That block looks great! I appears to have the same dimensions as the A sothe difference would be between the cast iron structure supporting a babbitbearing vs. an aluminum structure supporting a insert bearing. I would beconcerned about two areas, the effective thrust area of insert bearing onthe crank and the ability of the aluminum case to support the gyroscopicloads of the prop.Considering that they cast the block themselves and likely machine thecrank, it would be worth a phone call to see if they would add a few incheson the end of the crank and add few inches of snout (for lack of a betterword) to the end of the block.Robert HainesDu Quoin, Illinois________________________________________________________________________________
Ken,That block looks great! I appears to have the same dimensions as the A sothe difference would be between the cast iron structure supporting a babbitbearing vs. an aluminum structure supporting a insert bearing. I would beconcerned about two areas, the effective thrust area of insert bearing onthe crank and the ability of the aluminum case to support the gyroscopicloads of the prop.Considering that they cast the block themselves and likely machine thecrank, it would be worth a phone call to see if they would add a few incheson the end of the crank and add few inches of snout (for lack of a betterword) to the end of the block.Robert HainesDu Quoin, Illinois________________________________________________________________________________
RE: Pietenpol-List: Re: Model a engine blocks
Original Posted By: owner-pietenpol-list-server(at)matronics.com
I talked to them. They make about 25 at a time. They are about $13,000each assembled (long block). They sold one to Hawaii for a Peietenpol.Bob-----Original Message-----
I talked to them. They make about 25 at a time. They are about $13,000each assembled (long block). They sold one to Hawaii for a Peietenpol.Bob-----Original Message-----
Re: Pietenpol-List: Re: Model a engine blocks
Original Posted By: Mike
I have to say it is better to glue the gussets first than glue the crosspieces.For the spruce pieces it is better because the gusset is stronger, when itdoes not have a notch cut in it, and the end grain glue joint doesn't holdmuch anyway.For the 3" Ash pieces on the floor it is even more important because theyact mainly in compression and it seems the gusset would act as a buffer toprevent the hard end grain of the ash from pushing into the relatively softside grain of the spruce longeron.Skip________________________________________________________________________________Date: Wed, 10 Sep 2003 08:22:50 -0700Subject: Re: Pietenpol-List: Re: Model a engine blocks
I have to say it is better to glue the gussets first than glue the crosspieces.For the spruce pieces it is better because the gusset is stronger, when itdoes not have a notch cut in it, and the end grain glue joint doesn't holdmuch anyway.For the 3" Ash pieces on the floor it is even more important because theyact mainly in compression and it seems the gusset would act as a buffer toprevent the hard end grain of the ash from pushing into the relatively softside grain of the spruce longeron.Skip________________________________________________________________________________Date: Wed, 10 Sep 2003 08:22:50 -0700Subject: Re: Pietenpol-List: Re: Model a engine blocks
Re: Pietenpol-List: Re: Model a engine blocks
Original Posted By: "Mike"
Maybe this would be a better choice http://www.handhantique.com/touring.htmKen----- Original Message -----
Maybe this would be a better choice http://www.handhantique.com/touring.htmKen----- Original Message -----