Capt_Beavis
Posted a thousand or more times
2s was pretty weak on mine but it still flew. I am using a 6x4.5 prop and the Emax 1806. It has plenty of power with a 3s. Where are you putting your CG?
I maidened the Sportster today - it was brutal. I tried a bit yesterday and could not get enough lift. One huge weak point in this plane is the under-side of the fuselage near the rear of the wing. This part cracked along and the entire bottom of the fuselage came disonnected. The paper joint is also a weak joint on the under-side. Anyhow, nothing a few foam pieces for reinforcement and another stick of hot glue could not repair. So I was back out again today. The plane flew but it did a hard bank and ended up in a nose dive into a sidewalk. The COG seemed correct. I also have the correct thrust/down angle but one of my buddies said it may be too exaggerated. I'm using a 2300kv Power Up motor/800mah 2 S/GWS 7060 prop. That's the same combination I'm using for my Tiny Trainer. I have no weighed the Sportster but going to do that later on. I'm starting to think I may have 2 problems - not enough thrust; my TT seems kind of under-powered. I'd be interested to see what prop/motor combo others are using. I'm kind of frustrated; that's 3 of the minis in a row that have been lawn darts.
2s was pretty weak on mine but it still flew. I am using a 6x4.5 prop and the Emax 1806. It has plenty of power with a 3s. Where are you putting your CG?
The CG is right at the middle of the wing spar; so I think it's correct. I just ordered some EMAX 1806 motors from Amazon. I found what looks to be a pretty decent deal. I'll give these a go and run it with an 18 amp ESC and try 2 and 3 S.
http://www.amazon.com/gp/product/B00M7NTMRK?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
The CG is right at the middle of the wing spar; so I think it's correct. I just ordered some EMAX 1806 motors from Amazon. I found what looks to be a pretty decent deal. I'll give these a go and run it with an 18 amp ESC and try 2 and 3 S.
http://www.amazon.com/gp/product/B00M7NTMRK?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00
I have the 1806 on Tiny Trainers and they fly quite well with a 6.4 prop and both 2c & 3c. have a 12 AMP ESC in them. I don't see why a mini Sportster wouldn't do just fine that way.
JD
I have those motors coming in the mail. They have a pretty good deal on them at Amazon so I figured why not give them a shot.
Found out my CG was indeed too far forward. As for the reversed elevator.. well my ailerones were reversed. Have no clue how i missed that But now i finally have a flying plane. It just needs some fixing up
Life is funny. Somehow in the excitement of a new toy, seeing the direction of movement in a control becomes a simple 'It's moving' and we take off anyway.
Does anyone know why this design has fuselage doublers at the front?
Sorry to hear about your Sportster...I have 6 of them built 3 ready to fly and mine and the one I built for my neighbor fly incredibly well...I am using 3 cell 460 nano tech batteries 2204 2200kv motors and 7x3.8 props