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Dave Smith Models Aerostar 62

Build questions

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cymaz29/06/2010 17:11:08
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1941 forum posts
456 photos

 
Hi All
 
I have been given the above plane half finished by someone else who lost interest in it..
My question is does anybody know what the dihedral angle of the wing is?? I have done my best to put 32mm from the mid point / centre line of each wing tip. A bit of trig and I have 0.47 degrees on each wing or 0.94 in total. Does this sound about right??
 
Any other hints and tips about this old pattern ship would be really great.
Will post photos soon............
Steve Houghton29/06/2010 17:48:44
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193 forum posts
44 photos
Peter,
 
I have an Aerostar 62 kit still boxed, waiting to be built when I have a spare moment!
I'll try to look out the instructions, or measure it up for you.
 
Regards, Steve
 
Lee Smalley29/06/2010 22:20:31
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1935 forum posts
52 photos
yeah if you are going to put a powerful/heavy engine up front shorten the nose otherwise you will not get the c of g without a load of lead 
Steve Houghton29/06/2010 23:28:35
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193 forum posts
44 photos
Peter,
 
Dug out my Aerostar intructions. You were bang on with the dihedral of 32mm under each tip - was that a lucky/educated guess or were the wings already glued?
 
DSM recommends marking the centre line on each core tip (before fitting balsa tips), and then using a strip of 32mm wide 1/8" balsa pinned to each tip along the centre line. With the root touching the building board, this gives the correct dihedral of 32mm to the centre line of each tip.
 
CG is 150mm from LE at wing root.
 
If you need any more info from the instructions, let me know.
 
I see from the receipt that I bought the kit in 1993, so it's probably time I got started!
cymaz30/06/2010 06:29:14
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1941 forum posts
456 photos

 Cheers Lee and Steve. Steve, I was given the kit for nothing 1/3 built. I only ask about the dihedral as the previous builder put the wing tips on before glueing the wings together to get the angle correct
cymaz13/07/2010 12:13:39
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1941 forum posts
456 photos

 
Sorry for the delay...I have put a ASP70FS in my aerostar, the only thing is I have put the motor tight up to the firewall and putting servos and battery in the tail and put 90g of lead up there as well.
 
The C OF G does seem rather far back at 150mm, does anybody know if it can be brought forward without affecting the handling and making it unflyable???
Lee Smalley13/07/2010 12:40:35
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1935 forum posts
52 photos
nope do not bring it forward!   it will be nose heavy as it is mine was!!  i wish i would have chopped some of the nose off mine as it would nose over on take off if the grass was a tad long
cymaz13/07/2010 14:29:32
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1941 forum posts
456 photos

Cheers Lee
 
just done a quick C OF G check with the servos and lead in the tail. It's looking like the battery with a bit of luck will be enough to get the c.o.g right with some moving around.
 
 There is little or no room at the rear for the servos to be mounted very close to the tail, in fact I can have a closed loop elevator and push rod rudder is the most effective way to get the servos rearward.
 

Rudder Servo


Elevator Closed Loop Servo



Edited By Peter Smedley on 13/07/2010 14:43:15

Edited By Peter Smedley on 13/07/2010 14:43:59

Edited By Peter Smedley on 13/07/2010 14:45:15

cymaz25/07/2010 15:54:27
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1941 forum posts
456 photos

 
 
 
Well.......the pictures will prove I've finished her. IT FLIES BRILLIANTLY. No tip stall nice easy landings. It will need some more  work to trim up correctly and I maidened it without the cowl. But a big A++. If you have got one in a box may I suggest that you build it and fly it. BTW I put the landing gear on a plate under the tank and not in the wings
 

Edited By Peter Smedley on 25/07/2010 15:55:01

The Giggler13/08/2010 11:44:27
27 forum posts
Peter, do you have the dimensions for this plane, wingspan and fusslarge lenght without the cowl, was the undercarrage originally where it is in the pics ?
cymaz19/08/2010 20:42:17
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1941 forum posts
456 photos

Yep its a Dave Smith Aerostar 62. 62 " wing span 56" long. 150mm cog is good. The oiginal place for the undercarriage is out on the wings. Since I used a servo for each aileron and therefore had to cut a box out of the foam wing, I thought it best not to make more holes for the U/C fixing blocks. The original set up is  for one aileron servo.

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