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What could be done to reinvent the Affordaplane to a more homogeneous project?

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erkki67

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The sitting angle is 100deg, so with a foreseen 8deg Tilt back, ill get 118deg total.
but hey, this was just made to have something to sit on and test for my own needs, most probably a few things are going to change a bit, but it’s a good base to start with.
 

Hephaestus

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YMM

There's the thread looks like someone's doing an electric version at the moment.

Airfoil has issues that sound worse than the GU Rutan used.
 

FritzW

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Las Cruces, NM
I gave the program for our chapter meeting today (we've opened back up and we're re-starting our monthly pancake breakfast tomorrow). The program was on "the good, the bad and the ugly" of the Afford-A-Plane.

I didn't get rotten tomatoes thrown at me like I thought I would. Everyone was pretty open minded and we had some pretty productive ideas tossed around.
 

wicki1984

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Jun 23, 2020
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Hi everyone! I joined this group because I have plans for both the A-plane and a couple different versions of the mini-max. My plan is to build the A-Plane first and I have read all 38 pages of this forum. Towards the beginning it was briefly brought up using round tubular aluminum. I was having this same thought as well. It wasnt really talked about after that...or I missed it because the forum digressed for a while and I started drinking whiskey, made it a lot more enjoyable, lol. Is there anything inherently wrong with swapping out rectangular tubing instead using round? It would save a lot on weight. My thoughts were to to meet in the middle; since the 103 plans call for 1x2 I was going to use 1.5" round. The plan is to do straight cuts and use the gussets. I am considering putting a birdsmouth in the tubes along with the gussets, but I am not sure this is needed. I have a drum sander so doing the birdsmouth wouldn't be that difficult. Of course if I did the birdsmouth then why not weld it...hmmmmm choices. If I go with the gussets I plan on using rivets instead of the bolts. I did see using rivets instead of bolts was the general consensus on this forum. Excited to get to work on this plane when I get back from my deployment!
 

Aerowerx

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Marion, Ohio
As others have often said on here on HBA, stick with the plans. Unless you want to go through a complete engineering analysis. Such a change you propose is significant, essentially making it a completely different design.
 

addicted2climbing

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The LAK-16 airfoil doesn’t like smashed bugs or Moskitos on its leading edge, according to some pilots, its generating a lot of lift up until its getting dirty.
I just saw a video of an Lak-16 first flight with an E-Motor. Looks promising.

Marc
 

mullacharjak

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Nov 5, 2010
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183
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Peshawar Pakistan
Hi everyone! I joined this group because I have plans for both the A-plane and a couple different versions of the mini-max. My plan is to build the A-Plane first and I have read all 38 pages of this forum. Towards the beginning it was briefly brought up using round tubular aluminum. I was having this same thought as well. It wasnt really talked about after that...or I missed it because the forum digressed for a while and I started drinking whiskey, made it a lot more enjoyable, lol. Is there anything inherently wrong with swapping out rectangular tubing instead using round? It would save a lot on weight. My thoughts were to to meet in the middle; since the 103 plans call for 1x2 I was going to use 1.5" round. The plan is to do straight cuts and use the gussets. I am considering putting a birdsmouth in the tubes along with the gussets, but I am not sure this is needed. I have a drum sander so doing the birdsmouth wouldn't be that difficult. Of course if I did the birdsmouth then why not weld it...hmmmmm choices. If I go with the gussets I plan on using rivets instead of the bolts. I did see using rivets instead of bolts was the general consensus on this forum. Excited to get to work on this plane when I get back from my deployment!
An older Ultralight the TEMEN monofly used round tubes everything including the fuselage.The fuselage tubes are 3 x 080. The wing spar I think is a single 5 inch OD pipe. It has a pusher engine and tricycle landing gear.If you want to use round tubes for some reason and avoid modifications then its a good choice.Its similiar to an Affordaplane.
 

Victor Bravo

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Jul 30, 2014
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KWHP, Los Angeles CA, USA
The LAK-16 shown in the photos above has round tubes instead of square. They look bolted instead of riveted but that's irrelevant. I am guessing that the Lithuanian engineers (perfectly good, trained Comrade-Engineers) must have considered the relative advantage/disadvantage of square tube, performed the People's Proletariat Calculation of Mathematical Superiority, and found that the round tube was better or lighter or easier. Even for a basic quick-build high-drag, low-cost, child-safe, baseball bat of an airplane like this.

So although it certainly would require plenty of new engineering analysis, the "re-invented Affordaplane" per the OP might stand to benefit greatly by using round tubes. I'm guessing that the round tube version will save some weight....
 
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