Sunday was a nice flying day here in the Wasatch Front. it was a bit windy in the hours before noon as a small front passed over, but the early afternoon was great.
Norm Whittle brought out his new Pathfinder Twin. I believe he's found the best combination of engines for this design. He's using the ball bearing OS .15's used in higher performance applications.
In case you are new to the forum, or missed earlier posts from last year, the Twin was designed to compete in the Profile 40 class of competition.
By pure luck, it turned out to be an excellent stunt ship. Gordan says his is the best flying plane he owns, and that's saying a lot. Norm, who's no slacker when it comes to stunters, liked flying Gordan's so much he built one of his own. He was still working out the fuel loads and such when he took it to the NW Regionals. Had he not run out of fuel, He "cuda bin a contenda."
Whereas Gordy and I have been using 20% nitro in our .15fp's and la's to run a pair of 9X4 props, Norm had to detune his a bit, and runs 10% fuel. Great runs are occuring for him, almost every flight.
Gordy and I have opened up our venturii's to .250, and may be able to cut back a bit on nitro. Gordy changed to APC 8X4, and then 9X4 props with 1/8" clipped from each end of the prop. Our runs are now much steadier.
More trimming and changes will be followed up on next session. We think we may need to go to slightly longer lines. Mine are the shortest at slightly over 62' centerline to centerl;ine, while both Gordan's and Norms are 64, and a little bit.
Lap times seem to be in the 4.8 to 5.0 range using these line legnths.
In the following pictures, Gordan's is the red one, mine is the blue and yellow one, and Norms is the Blue and Silver.
[photo not recovered: 29236.jpg]
[photo not recovered: 29237.jpg]
Gordan has also started applying the trim to his Pathfinder LE.
Here are a few pictures of it as it looked on Sunday.
[photo not recovered: 29238.jpg]
[photo not recovered: 29239.jpg]
I don't have a scan of it, but I saw several pictures of Jim Tichey's rendition of the LE. Super job so far. Jim's has the PA .40 lite with a pipe mounted in his.
Norm Whittle brought out his new Pathfinder Twin. I believe he's found the best combination of engines for this design. He's using the ball bearing OS .15's used in higher performance applications.
In case you are new to the forum, or missed earlier posts from last year, the Twin was designed to compete in the Profile 40 class of competition.
By pure luck, it turned out to be an excellent stunt ship. Gordan says his is the best flying plane he owns, and that's saying a lot. Norm, who's no slacker when it comes to stunters, liked flying Gordan's so much he built one of his own. He was still working out the fuel loads and such when he took it to the NW Regionals. Had he not run out of fuel, He "cuda bin a contenda."
Whereas Gordy and I have been using 20% nitro in our .15fp's and la's to run a pair of 9X4 props, Norm had to detune his a bit, and runs 10% fuel. Great runs are occuring for him, almost every flight.
Gordy and I have opened up our venturii's to .250, and may be able to cut back a bit on nitro. Gordy changed to APC 8X4, and then 9X4 props with 1/8" clipped from each end of the prop. Our runs are now much steadier.
More trimming and changes will be followed up on next session. We think we may need to go to slightly longer lines. Mine are the shortest at slightly over 62' centerline to centerl;ine, while both Gordan's and Norms are 64, and a little bit.
Lap times seem to be in the 4.8 to 5.0 range using these line legnths.
In the following pictures, Gordan's is the red one, mine is the blue and yellow one, and Norms is the Blue and Silver.
[photo not recovered: 29236.jpg]
[photo not recovered: 29237.jpg]
Gordan has also started applying the trim to his Pathfinder LE.
Here are a few pictures of it as it looked on Sunday.
[photo not recovered: 29238.jpg]
[photo not recovered: 29239.jpg]
I don't have a scan of it, but I saw several pictures of Jim Tichey's rendition of the LE. Super job so far. Jim's has the PA .40 lite with a pipe mounted in his.
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I'm wondering why everything is spinning around?
John Miller
John Miller