The wandering of the Sig Tiger is known as a Dutch Roll, in analogy with the round bottom Dutch sailing ships. It is due to too much dihedral/too little fin. It looks like you followed the plan. It would be difficult to reduce the dihedral. Try adding area to the fin. Post-It Notes are a quick way to add area. It would be fairly easy to make a larger fin. The long nose on this plane tells us it was designed at a time when wood propellers were used. Mine turned out nose heavy with the plastic prop. The long nose also means the prop area reduces the effectiveness of the fin. I went to the next smaller size of wood prop. Had to remove the weight from the tail which I added to balance the plastic prop. The wing area wants a bigger prop, but the fin must been enlarged to accommodate.
You won't find any vacume plastic parts in the kits and the wood quality with the vintage die crushing can be quite a disaster. I carved the motor. The guillows kit I'm sure is much better. Also I'm sure this design is going to be a brick in the air, it's small size and utiilization of many slab parts has my weight over 12 grams already , without wheels, prop, tail skid, cover, nose block. I figure 22 grams all done if I'm lucky. NOt many comet kits left around these days! Thanks
Yes , I've always loved Bethovens 5th. THe way it's begins with those singular low notes warning and yet yielding to the higher power of the horns and flutes culminating in a righteous full on gallop to the victorious desonte cresendo! It really is quite magnificent, I'm glad you enjoyed it.
Yes, I know the feeling, I am very lucky to have a field as big as this even though I want bigger! Building planes for small fields may be the way. Good luck and Cheers!
Looks to me like your toy airplanes are working as they should. I don’t see the frustration. As I told my daughter a few years ago after a full day of searching for the lost Peck-Polymers Nesmith Cougar she’d built that circled up and up and over a tree line into the next field and maybe beyond where it is gone forever, free flight is a cruel and heart-breaking game that admits only the sturdiest souls. In the free flight game, you build a beautiful thing out of balsa and tissue and you love this thing. Generally, the more love you put into it, the better it flies - when every stick is cut and sanded to fit “just so” and you really take your time sanding the assemblies so the tissue can lay on the frame and shrink down like it was born there, and you get good rubber for it and make a motor and match it to a good prop - and if you’ve done everything right the sky might love it more than you do and keep it. And that’s how you win the free flight game. It is the purest and best corner of the toy airplane hobby, and it looks to me like you’re doing it right.
@skipstalforce I enjoy watching you fly these plans they are pretty cool. I think this one had the human element to it for sure. Keep it up, brother 💪 🙏
Yes! THe motor in the finch is braided. But the fuse is very narrow in the back and I'm pushing the bounds of what will fit back there with the motor being ruffly twice the legth of the plane. On the next round I'll shorten it and add a gram of nose wieght. Thanks!
THanks Bry, I discovered the stalls and dives were caused more by my poor launching technique then anything else. Who knew it's like a good golf swing, something you have to practice!
