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Performance STOL Double Slotted Flap system now STC'd for the PA-18

bob turner said:
Re: comparing flaps of the same length?

My impression of the much longer Husky flaps was that they were not nearly as good as a stock set of Super Cub flaps adjusted to the max allowable extension. My guess would be that the more effective Cub flaps would be even better if Husky length. I think my opinion is worthy.

Next question: has anyone installed these STC flaps on a Dakota slotted wing?
Click to expand...



Yes, skip the slots and just do the Flaps
 
hottshot said:
Yes, skip the slots and just do the Flaps
Click to expand...
Bob,
Not sure where that theory that Cub flaps were superior to much larger Husky flaps originated ....... Might want to rethink that one.
In the original Piper test pilots report of the then new "125" Super Cub he commented Super Cub was a perfect balance of wing and power, but felt the new flaps were NOT as effective as he had expected.........
If you were to hook Husky flaps onto a Super Cub, they would be a VAST improvement over standard Cub flaps,
Possibly even more than the 90" Sullivan flaps...... If you dig cub flaps and feel they are great, that is fine.
But folks have been modifying now for 60 years to make them work ALOT better............. These new Performance flaps may turn out to be the best mod ever offered since Roger Borer offered us his prop.[emoji6]

Sent from my LM-X210 using SuperCub.Org mobile app
 
Bob,

No offense intended, but if that's your honest opinion, you need to get some instruction in a Husky.

MTV
 
Funny that this comes up. I shipped Doug Keller a set of Husky flaps and all the associated hardware from a wrecked border patrol Husky I had years ago. He built a Super Cub wing with Husky flaps. Must have seen an improvement with these slotted flaps since he took them all the way though certification.
 
Steve Pierce said:
Funny that this comes up. I shipped Doug Keller a set of Husky flaps and all the associated hardware from a wrecked border patrol Husky I had years ago. He built a Super Cub wing with Husky flaps. Must have seen an improvement with these slotted flaps since he took them all the way though certification.
Click to expand...

That was one heck of a performing Super Cub with the big wing and Husky flaps as seen in Big Rocks & Long Props Vol. 2
 
Steve Pierce said:
Funny that this comes up. I shipped Doug Keller a set of Husky flaps and all the associated hardware from a wrecked border patrol Husky I had years ago. He built a Super Cub wing with Husky flaps. Must have seen an improvement with these slotted flaps since he took them all the way though certification.
Click to expand...
Steve, It seems to me that it would be a lot easier to modify a -18 wing for the double slotted flaps than it would be with the long Husky flaps which would require aileron modifications as well. I like the long 110" flaps on my E-AB Cub.
 
skywagon8a said:
Steve, It seems to me that it would be a lot easier to modify a -18 wing for the double slotted flaps than it would be with the long Husky flaps which would require aileron modifications as well. I like the long 110" flaps on my E-AB Cub.
Click to expand...

I've converted a pa-12 s to long flaps on covered wings, little of a pain, but doable... he already had squared off wing....
 
mike mcs repair said:
I've converted a pa-12 s to long flaps on covered wings, little of a pain, but doable... he already had squared off wing....
Click to expand...
That's my point, from the perspective of the person developing and earning the STC he wants the end result to be as easy as possible to accomplish so that he can maximize his potential customer base. Keeping the installation labor down is a big plus.
 
Does anyone know what the difference in weight is between the 2, 3 and 4 hanger setups? Only number I can find is that a 2 hanger certified setup is about 12lbs more than stock flaps, but nowhere have I seen a listed weight of each setup.

Cheers,
Jeff
 
I’m speaking out of turn but I’d assume you can get close enough by figuring the weight percentages on the 2 hangar flap then doing the math on the added length. Guessing it would be within one or two lbs unless there are significant reinforcements on the longer flaps?
 
jimboflying said:
I added a simple external retract spring which helped a lot.
Click to expand...
I assume one end of the spring is attached to the attachment bolt in the flap, the other end appears to be attached to a fitting of some kind with a bolt holding it to the forward hanger. Did you drill a hole there to mount this. I have been trying to do the same thing, but hesitated to drill a hole in the flap hanger.
Thanks
 
Tgskillskill said:
Does anyone know what the difference in weight is between the 2, 3 and 4 hanger setups? Only number I can find is that a 2 hanger certified setup is about 12lbs more than stock flaps, but nowhere have I seen a listed weight of each setup.

Cheers,
Jeff
Click to expand...

Probably not as much as we would think for the length. The experimental version has a different doubler for inside the flap hanger and does not use the thick doublers on the false spar at the hangers. I will have to look in my notes at those weights.
 
Cathy has been flying my Super Cub getting ready to take it to the Ladies Love Taildraggers Fly-In next weekend with two other local women in their Super Cub and PA12. She can not pul the 4th notch but slows her down fine to make some nice landing. I never noticed a difference in the amount of force taken to pull the flaps full on with my alreadty shortened flap handle with a 4 notch pawl.
 
planenuts said:
I assume one end of the spring is attached to the attachment bolt in the flap, the other end appears to be attached to a fitting of some kind with a bolt holding it to the forward hanger. Did you drill a hole there to mount this. I have been trying to do the same thing, but hesitated to drill a hole in the flap hanger.
Thanks
Click to expand...
I answered my own question, the picture of the external spring is going from the hole in the front hanger to the lower part of the split flap, not the first section.
Thanks
 
Tgskillskill said:
Does anyone know what the difference in weight is between the 2, 3 and 4 hanger setups? Only number I can find is that a 2 hanger certified setup is about 12lbs more than stock flaps, but nowhere have I seen a listed weight of each setup.

Cheers,
Jeff
Click to expand...

Totaled installed weight of a set of certified Performance STOL Flaps is 25.0 lbs.
Total weight removed, old flaps and associated parts is 13.2 lbs.
Inboard false spar doublers used on certified flaps but not experimentals are 9.8 oz per pair
Outboard false spar doublers used on certified flaps but not experimentals are 15.4 oz per pair
Cherry rivets used on all four false spar doublers weigh 4.5 oz.
Total weight of 3 hanger 90" flaps for a Dakota Cub slotted wing is 27 lbs for both flaps and hardware.

One side flap and hardware.
32743.jpeg

Certified flaps have a straight flap hanger doubler where this one has a relief cut out of the forward end.
32741.jpeg
 

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These are what the certified flap hanger stiffeners look like. I keep them in the freezer until I install them. It is a real tight fit and have had no issues installing them after I started sticking them in the freezer to shrink them a bit.
IMG_20190704_070501.jpg
 

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Steve,

Thanks for the 2 great posts above. REAL DATA !!! and sound installation tips.

I use liquid nitrogen ( -320 ) to install bearings, plugs and etc. without having to pound or press them. It was only a couple hundred bucks to get a special 3 liter thermos that the local compressed gas company would fill for me. Like so many tools, that might initially seem over the top; once you have them, you can't imagine doing the job without it.
 
I weighed every part going on and coming off on the certified version. They were dead on when the said the the certified version adds 12 lbs. I even weighed the Cherry Max stems and washers after I pulled all the rivets. Silly I know but some people like to drink, I like to weigh Super Cub parts. ;)
 
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