Re: KR> Wing tanks

Greetings This discussion throws my idea of stub tanks right out the window and with good reason as I am a complete novice (onlly just started finishing this project) and did not adequately consider CG. Rather learn on the ground than in the air! As a skydiver I have a good understanding of ho

Re: KR> Flipping on back

Well it’s already a retract but they have just took the lever out basically and lock them in the down position and glassed back over the holes in the wings and I just kind a like the looks of the retract Sent from my iPhone > On Dec 14, 2020, at 10:05 PM, Flesner via KRnet wrote: > > On 12/1

Re: KR> Belly Board v flap

Brendan, I'll toss out something to think about. I don't know the answer so perhaps someone will chime in with more information. I don't know the impact of where the hinge point for the belly brake is located; behind or forward of the aft spar. N133RM is a KR-2S and the hinge point is 6-8" forwar

Re: KR> Flipping on back

On 12/14/2020 9:56 PM, Craig Williams via KRnet wrote: I would like to put it on its back to cut the openings for the retractable gear + Any particular reason you decided to go with retracts? Larry Flesner _

Re: KR> Flipping on back

I flipped mine with no motor attached. See this video. https://youtu.be/sqOr4TdbAo4 Craig N51CW (formally N886MJ) N6423B > On 12/14/2020 9:08 PM Chad Robertson via KRnet wrote: > > > OK I have a question that may seem a little weird I am wanting to flip my > plane over on its back so that

Re: KR> Flipping on back

I would remove the prop then bolt a x-bracing made out of wood or metal that allows enough room for stub root wings to rotate and miss the floor. After the plane is inverted you can support the tail area just ahead of the vertical fin with an easy chair that is soft and fabric covered. With this ty

Re: KR> Flipping on back

Mine did not have the engine. But no problem. Tie a rope to the prop hub and the tail area. Then rest it on stands. See my old web page. Heading at the top - — Flipping the fuse http://www.philskr2.50megs.com/index.html Phil Sent from my iPhone > On 15 Dec 2020, at 13:08, Chad Robertson via

Re: KR> Wing tanks

On 12/14/2020 7:44 PM, Mark Wegmet via KRnet wrote: The CG issue would (I would think) depend on placement of the tanks - wing or tip - relative to the "normal" CG calculations for the airframe. + That is correct as with anyth

Re: KR> Wing tanks

On 12/14/2020 7:44 PM, Mark Wegmet via KRnet wrote: I need to understand how you get reduced load on the wafs with fuel in the outer wing. + The outer wing panel is always producing lift during flight, I would hope, so lets just set the pl

Re: KR> Wing tanks

Because when, in flight, all the weight is concentrated in the fuselage and the lift is distributed along the full span of the wing, the maximum amount of shear is applied to the wing attach fittings. When the weight is distributed along the span of the wing, it results in less shear at the wing

KR> Flipping on back

OK I have a question that may seem a little weird I am wanting to flip my plane over on its back so that I can work on the bottom side of it my question is can I leave the motor on it knowing that I have to drain all fluids and my next question is can I build I support that would bolt on where t

Re: KR> Wing tanks

Okay, maybe I'm not too bright... I need to understand how you get reduced load on the wafs with fuel in the outer wing. Assuming 6 pounds per gallon, how does (for example) a 10 gallon wing tank reduce stress on the waf if (lift issues aside) you maneuver in any direction, considering inertia and

Re: KR> Belly Board v flap

On 12/14/2020 5:47 PM, brendan palmer via KRnet wrote: If the belly board opens 80-90 degrees it may actually pitch the nose down slightly as it mainly applies a drag force. + OR, at 90 degrees you get a pressure build up

KR> builder / maintenance tip

While doing some work on the Challenger I needed to replace a plastic Adel clamp with a steel / rubber clamp in a very difficult spot to work.  Adel clamps, especially steel, can be hard to get the holes to line up with one hand on the bolt and one hand on the washer and nut.  I remembered ha

KR> Wing tanks

Larry said, > "Fuel in the outer wings also reduce the weight carried by the W.A.F.'s." That is so true. Tip tanks, or outer wing tanks, carry with them great advantages. Not only do they carry weight without affecting CG to any significant extent, but unloads stress at the wing root, making f

KR> Belly Board v flap

I modified my Kr2 flaps, made them from the rear spar with my own design hinges. They worked very well. They took the floating out and nice steep approach. Great on Short field approach with side slip. I just used 4130 angle attached to top and bottom of rear spar and protruding about 2 inches b

Re: KR> Belly boards and/or Flaps

I added flaps to my KR after 500 hrs of flying with no deployable drag, then flew it another 900 hours after the flap installation. My flaps were significantly larger than the "stock" flaps as mine hinged just aft of the rear spar and deployed down to 38°. They were the width of the stub wing

Re: KR> Belly boards

I can tell you I had to KR's. The one I built and Les Palmer's and the flaps did not do anything for either one of those airplanes. You could pull them on and you really could not tell a difference in landing or take off. Sent from my iPhone > On Dec 14, 2020, at 7:24 AM, Flesner via KRnet wro

Re: KR> Cowling?

Just FYI. I had a WW Cowl on my KR2. I do not believe that it was made for a KR2, and it was sold to me as a KR2S and was built for a KR2S. I had to make some modification to the cowl to make it fit my KR2. It was definitely better than starting from scratch. My Panther Building Documentation

Re: KR> Belly boards

On 12/14/2020 1:03 AM, Michael via KRnet wrote: I will also be moving fuel out the cockpit to stub wing tanks while I have the fuselage upside down ++ Keep in mind that you will be shifting your C.G. aft when you do that.  It is

Re: KR> belly boards

years ago when I had 81JM upsidedown I used carbon and resin to connect the flaps under the airplane making a belly board and stiffer flaps. can't say it did much good, though it never caused any problems. Easy to do and still there..