Showing posts with label built. Show all posts
Showing posts with label built. Show all posts

Tuesday, November 29, 2011

Video: Tim W's affordaplane.

On Turkey day I went and saw Tim W's plane. I also took a little video. I was at the wrong end of the field, but he did get the plane airborne a couple times. It was a little windy, so I don't blame him for not flying the pattern. Enjoy!

Click here: Tim's Affordaplane

Thursday, November 24, 2011

Tim W's Affordaplane.

Hey everyone, this morning I visited Tim W at the airfield. The weather concerned me on the way out. It was a little windy, a bit hazy, and the clouds were quite low. When I got to the airfield, he took me on a tour of his plane, and the build decisions he made.

Welcome to my first impression of the airfield... :-) Poor plane.

My first impression of Tim's plane however, was very good, and it stayed that way. His modification list is quite extensive. The winds were a bit high, so Tim kept his flying to a couple of quick runs down the runway.

Performance wise, with his MZ201 powered Affordaplane, is a mixed bag. The planes level maximum airspeed is in the 65mph range. However the climb performance is disappointing.
Hi Tims plane.

So, what all did tim do? He tried to make the plane easily disassembled. He did something similar to Gent's tail, where the horizontal stablizer can fold. ... except the control horns interfere with the rudder. On the bright side, having a hinge means you can use the pins as a quick removal tool. The main and TE spar are also held on with pins.
The tail originally just had single bracing wires, but Tim saw the leading edge dancing during flight, and he decided they needed some more bracing. While we're on the subject of flying surfaces, he also sealed the elevator and alerion gaps.

I really liked the landing gear. It's fiberglass rod, and beyond providing some shock absorption they are lighter than the per plans landing gear. They also fail progressively on a hard landing. (Tim's turning out to be a good test pilot.) Due to the way they are attached, they are easily replaced.
While we're looking at Tim's planes legs, I'll note that he did not use the solid aluminum round bar to transfer strut load from one side of the plane to the other. He used some flat 2024 plate. You can also see he doubled up the bottom tube. The stock gear were hard enough on the frame to bend it.

The MZ201 he's running is the planes second engine. It was originally on a Kawasaki with a reduction drive. His engine mount is 2" longer than per plans. Despite that, he has 20oz of lead on the tailskid.

I like the prop.

He also ran all cables for the control surfaces. I'm not sure I'd make the same choice, but I have the whole r/c plane thing going for me. But look at those beautiful belcranks. The cables also facilitated the folding tail.

Thank you Tim for letting me look at, and show off your plane.

Tuesday, November 22, 2011

Rogers Affordaplane

Roger completed his plane in the last few days. He built a fiberglass fuel tank, that fits in place of the wing seal. He also made his using aluminum ribs.

He tells the story best, Roger wrote:
"I made quite a few changes to the plane and did not
want to talk about them until the thing flew. It will now be until spring
because of the cold weather. Some of the things I changed are; gap seal fuel
tank, droop tip wings, wing ribs made from sheat aluminum, US 35b wing foil. I
uses a 400cc polaris snowmobile engine which should put out about 40 hp as
arranged. I also made my own prop with ptips. It pulls very well. It weighed in
an 72 lbs. Many of the changes I made did reduce the weight. The finished wings
without droop tips weighted 27.5 lbs the tips were about 4.5 lbs each. The gap
seal tank serves two purposes of tank and most of the gap seal. I also went with
Y struts to make it easier to get in and out. I will try to post pictures when I
can figure out how to do that. There are some pictures on cheapaircraft 2 under
kenneths and under Rogers. They were posted by my son. I put it in our county
fair in Aug. and won a sweepstakes with it. I also took it to our local flyin
and did a bit of taxi work. It handled better than I had expected on the ground.
I also got a little experience in a two seater but it was a trike gear. I need
tail dragger experience and that a a bit harder to come up with here. I do not
know the final weight but I believe it will be under 300. I learned a few things
along the way like fiberglass tanks do not hold up to ethanol fuel. I had to
coat the inside of the tank. I would like to find plain gas but can't find any
here locally. I spent less than $2,500 out of pocket but I am a really good
scrounger. If you want any more information please contact me direct and I can
give you more info. Keep building. Roger"

"I was very careful to check out weights of all the changes I made
and everyone except putting very large tires on were under or at the weight that
the plans would have been. and the wheels were lighter than wheel borrow so that
would have been close to a wash. I wanted large tires to make up for no
suppension. The sheet aluminum ribs were almost half the weight of doing the
foam ones. I made one out of foam to compare. It took me about 20 minutes per
rib to make them but the time is in making the jigs. once set up they are almost
fun to make and turn out exactly the same every time"





That's a darned good looking plane. I can't wait till spring when we can get some flight reports about it!

Some new information from the horses mouth:
"I do not know the weight of everyone elses wing, but mine did come in with fabric and paint at 27.5 and 27.8. One wing was a bit heavier because I ran out of 1.8 ounce fabric and finished that wing with a bit of 2.7 ounce cloth which I had on hand. I did install droop tips which weighed about 4.5 lbs each The material is siding coil which comes in 2' x 50' rolls."