rubber motors

Ask other modelers for a little help / knowledge ?

Re: rubber motors

Postby Wildpig » Mon Dec 09, 2013 7:59 am

I doubt that picture is the problem with uploading photos. Besides, she was ironing fabric, a legitimate airplane activity. :roll:
Seriously, I think the upload has to do with the different servers and a phpbb thing.

As for the Don Ross book and the workboard, they have been out of stock from Guillow's for quite a long time. Those kits you have, probably have been on the store shelf for a long time, too.

Amazon.com can get you the book.
Wildpig
 
Posts: 529
Joined: Thu Jan 26, 2012 9:41 am

Re: rubber motors

Postby davidchoate » Mon Dec 09, 2013 9:21 am

Last night I downloaded my P-40 pictures to Photobucket. Now I just have to figure out how to get them from photobucket onto my post.
davidchoate
 
Posts: 1263
Joined: Wed Aug 14, 2013 6:41 am
Location: PHiladelphia PA

Re: rubber motors

Postby davidchoate » Thu Dec 12, 2013 11:54 am

The weather has been horrible for flying here.Wind, snow,and ice. But I went to the park anyway. the whole walk there I kept seeing myself slipping and falling on my plane, and crushing it to splinters,thats how bad my luck has been with my FF Javelin sofar. The wind was still. Till I got ready to launch, of course. I raised the leading edge by 1/32" and changed the prop to 1 from a 400series Mustang. The result of this was either a vertical stall, or a dive into the ground. I can't make sense of it. But I learned that snow is perfect for crashing a plane into. I had alot of flights, and managed my Javelin home in one piece for the first time ever.honestly' I think it was the first time I brought any plane home in one piece. But anyway I'm going to do my experiments in the shop till the weather improves. I switched to a smaller prop, and will not wind up the motor so much. The shop is 150' by 50' and 30' to the ceiling. I'll let you know how it goes.
davidchoate
 
Posts: 1263
Joined: Wed Aug 14, 2013 6:41 am
Location: PHiladelphia PA

Re: rubber motors

Postby Steve Blanchard » Thu Dec 12, 2013 1:29 pm

David, If you are getting power stalls then you need to add downthrust to the nose block. Do this by adding shims of balsa behind the top of the nose block so the prop points more downward. I am saying this assuming that you have the model balanced properly and the glide is good. Without those 2 elements you will have a hard time reaching optimal flight performance.

I hope this helps,

Steve
Steve Blanchard
 
Posts: 343
Joined: Tue Jun 14, 2011 10:08 am

Re: rubber motors

Postby davidchoate » Thu Dec 12, 2013 3:08 pm

i did all that. shimming the prop, wings, and whatnot. But I'm not crazy. It is the outside. either the plane is too light for any type of wind, or air movement, or there are mysterious forces at work in the park I was flying in. I just did 4 indoor flights with the recommended thrust,balance, wing angle, and prop. results: perfect flight. on the 4th try it hit the open hood of a car and broke the landing gear. I can't time because it runs out of room before the motor is done. I like indoor FF.
davidchoate
 
Posts: 1263
Joined: Wed Aug 14, 2013 6:41 am
Location: PHiladelphia PA

Re: rubber motors

Postby Steve Blanchard » Thu Dec 12, 2013 3:52 pm

Sounds like you are having some success. That's great. What direction is it turning during the power phase? Maybe you can shim in more turn during the power phase. If it is going well to the right just add a shim to the left side to point it right and the opposite of course for left turn. When you add more side thrust often you reduce the down a little as well. That's something that always made me scratch my head on the boxes when they say "FLIES FOR OVER 100 FEET!" None of these models should be trimmed to fly in a straight line, except of course if you are flying the BLUR (that's a whole other discussion).

Good luck!

Steve
Steve Blanchard
 
Posts: 343
Joined: Tue Jun 14, 2011 10:08 am

Previous

Return to General Building Questions

Who is online

Users browsing this forum: No registered users and 29 guests