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RE: Great Planes Super Sportster EP with Modified Power... - 11/12/2010 7:36 PM   
opjose



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From: Poolesville, MD, USA
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quote:

ORIGINAL: guapoman2000

opjose,

I have never come across anyone expressing an Electrical (Motor) Power system with your posted equations as noted above.



I see 80% quoted all the time in different E-Flyer magazines, as a quick way to check if your motor to prop ratios are OK.

The idea is to leave enough overhead for the motor to unload, but not so much that your throwing away current or incorporating excess weight.


This is only a guideline but doesn't address motor sizing, etc.

My new SS EP is using a 750KV motor with a 14.8v 4S 3650 pack and a 12x7E prop.

I have my flight timer set to 14 minutes, but I tend to push flights beyond that without worry.




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RE: Great Planes Super Sportster EP with Modified Power... - 11/25/2010 12:25 AM   
guapoman2000



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From: Orlando, FL, USA
Status: offline 		Guys,

Flew my Great Planes Super Sportster EP again this morning at my Club that is on the way to work and what a delightful Sport model.

I am still flying the model with the HIMAX HC3630-1000 (1000 Kv) and swinging the Master Airscrew "Wooden" Glow 10 X 7 with very good results using the light and generic 3-Cell, 2200mAH, 25C, Li-POLYs. I place the timer at nothing over 7-minutes and because of her light weight, it is almost always Dead Stick landings as it continues to float and float but, I have it dialed in and landings are picture perfect and right in front of the pilots station.

I have just ordered some fresh 3-cell, 2600mAH, 30C, Li-POLYs and watch out!

Carlos

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RE: Great Planes Super Sportster EP with Modified Power... - 11/25/2010 11:19 PM   
guapoman2000



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From: Orlando, FL, USA
Status: offline 		A WARM Thanksgiving wishes to all!

Oh wow!

Thanksgiving morning produced one of the best weather conditions ever in Central Florida with completely Dead Calm and nice and sunny with Dark Blue Skys! I stayed for 5 hours!!!

Some pictures of my Sportster EP:











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RE: Great Planes Super Sportster EP with Modified Power... - 3/19/2011 9:38 PM   
Pistol Pete


 

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From: Seffner, FL, USA
Status: offline 		Havent been in this thread in a while...

Mine met the ground at well over 50mph on a dive when the elevator broke and poof! It was indeed spectacular.

Still have box cover decorating inside garage door...and thats about it.

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RE: Great Planes Super Sportster EP with Modified Power... - 3/19/2011 10:05 PM   
opjose



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Status: online 		Interesting... that's exactly how my first one went in.

The CA hinges that are provided deteriorate after a year or so and will crack and break.

I recommend using somebody else's CA hinges, such as the Dubro ones.



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RE: Great Planes Super Sportster EP with Modified Power... - 3/21/2011 1:27 PM   
Pistol Pete


 

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Status: offline 		It was the wood itself that broke width wise on both sides.

I was impressed that the servo was able to push against such high wind to the point of failure.

"Another" lesson learned.

I do have the fuselage inmortalized in google sketch up with the thought of some day making it a tad bigger.

Thanks for all the tips and responses that I got from this piece of the world.




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RE: Great Planes Super Sportster EP with Modified Power... - 3/21/2011 4:54 PM   
opjose



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quote:

ORIGINAL: Pistol Pete

It was the wood itself that broke width wise on both sides.

I was impressed that the servo was able to push against such high wind to the point of failure.

''Another'' lesson learned.




That may have been due to flutter.

The large tail surfaces are prone to this at higher speeds than the plane was designed for....



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RE: Great Planes Super Sportster EP with Modified Power... - 10/19/2012 7:25 AM   
guapoman2000



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Status: offline 		Can't believe it has been over 2 years since I have flown my beloved Great Planes Super Sportster EP!!!

After a very Long Shelving of the model, I dusted it off and carefully looked it over with a fine eye and hands such that I decided to re-enforce the Vertical and Horizontal Stabs (this is the weak part of this model) and installed light wire-wrap gauge wire to keep the Horizontal Stab from flexing and making some wired noises during fast speed passes! I double checked all other control surfaces and it is ready to fly once more!

This model has lots of flights and it somehow keeps flying solid everytime!

A few pictures of my work tonight!









Yes, you might say it will take to the skys in the morning!!!

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RE: Great Planes Super Sportster EP with Modified Power... - 10/19/2012 11:36 PM   
guapoman2000



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This model being a few years old and not flown for a little over 2 years did great after a few hours looking it over last night and fixing and improving a few things on it! It flew like it was on rails!!!

Take Off:


Low Pass:


Low and Slow:


A few pictures just sitting pretty!








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RE: Great Planes Super Sportster EP with Modified Power... - 10/20/2012 2:05 AM   
guapoman2000



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RE: Great Planes Super Sportster EP with Modified Power... - 10/20/2012 2:07 AM   
guapoman2000



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