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my little trainer

d8veh

Elite member
#3
It needs to balance about 25% of the way from the front of the wing to the back. I'm going to be surprised if you don't need to shorten the front of that plane, or, of course, you could move the wings forward. have you only put the wings on for the photo or are they in the intended position?. The rest looks pretty good, and it's going to fly if you get that balance point right.
 
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#7
It needs to balance about 25% of the way from the front of the wing to the back. I'm going to be surprised if you don't need to shorten the front of that plane, or, of course, you could move the wings forward. have you only put the wings on for the photo or are they in the intended position?. The rest looks pretty good, and it's going to fly if you get that balance point right.
Im using a heavy drill battery, the balance is about 25- 30%. i need to sort out the landing gear, then i can do some more tests! I can move the battery and the wing sepparetly where ever i need! See the video and reply what you think! Thank you!
 

d8veh

Elite member
#14
1150g (40oz) is a bit heavy, most of my planes are 850g (30oz) or less. I suspect you are correct, your battery is heavy.
That's nothing. i don't know how long you've been around, but when I started there were no small servos and you needed a 4 oz receiver battery too. It was very rare to have a plane under 3lbs (1361g). they all flew, though some of the 7lb trainers were a bit tricky to get into the air if you had a short runway.
 

Merv

Legendary member
#15
That's nothing. i don't know how long you've been around, but when I started there were no small servos and you needed a 4 oz receiver battery too. It was very rare to have a plane under 3lbs (1361g). they all flew, though some of the 7lb trainers were a bit tricky to get into the air if you had a short runway.
Yes I’ve been around long enough to remember those days. The days of the slimers. Thankfully, everything is smaller, lighter & cleaner now.
 

Keno

Well-known member
#16
Yes I’ve been around long enough to remember those days. The days of the slimers. Thankfully, everything is smaller, lighter & cleaner now.
Heck everything weighted 7 pounds or more for trainer. We had a grass field and big wheels were a must. That 40 needed to tuned perfect. Happy flying
 
#17
Great flight, congratulations. Tell us more about your homemade foam board.



1150g (40oz) is a bit heavy, most of my planes are 850g (30oz) or less. I suspect you are correct, your battery is heavy.
The foamboard started out as foam ceiling tiles 2 x 2 feet, 1/2 inch thick. I sanded down the pattern and the back side reinforcement, so i was left with 1/4 inch thick foam. I glued three tiles together with hot glue to make larger board. Then i glued cooking paper on both sides and i was ready to go! :D total cost: 2 euros for foam, 1 euro for cooking paper, 2 euros for PVA glue. Sanding took me about 30 minutes!
 
#18
I used bisycle spokes for landing gear, plastic pottle bottoms for wheels and the wing is held on by rubberband from my old pants! :D I was little bit hurry to get it ready, so i used what was at hand! :D
 

d8veh

Elite member
#19
I used bisycle spokes for landing gear, plastic pottle bottoms for wheels and the wing is held on by rubberband from my old pants! :D I was little bit hurry to get it ready, so i used what was at hand! :D
A true engineer is someone that can do something for a penny (Cent) that any fool could do for a pound (dollar/Euro). I hereby award you your degree with honours.
 
#20
I just finished the new landing gear and also made some reinforcements to the body. Now im on my way to try it out! :D
 

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