Larry Eddy

My Feedback: (24)

[link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=364]Read RCU's own Greg Covey E-Conversion article![/link]

StephenT

Medina Ohio!!
I've been there!!

Love the Extra 300. I also converted one. Mine is the smaller .25 Modeltech version. I tried the AXI 282010 and 10 Hecells. It flew Okay(like a tail heavy trainer) but the motor and batteries were too hot. Recently switched to my old Jeti 30-3 DD and 12 hecells and got outstanding performance for 7 minutes. With lipos it was even better.

Greg you inspire me.

StephenT

dottney

My Feedback: (2)

Stephen,
What size prop are you using with your Jeti 30/3? I'm running a couple on 10x7 on 8 cells. I didn't think you could push the Jeti 30/3 with 12 cells.
Dave

StephenT

Love the jeti


I have been using this jeti 30-3 for 2 years and have been flying it DD and geared 2: 1 in at least 5 different planes with 8 to 12 cells. I am using DD 9x7.5 and 10x6 props with 12 1800 mah Hecells giving 7 minutes run. My Extra 300 is to small to use in a geared configuration because I have to use a 15x8 prop.



Stephen T

Greg Covey

Stephen,

Nice job on your .25-size Extra 300 conversion!

Inspiration is what it's all about!

rccrazedman

My Feedback: (10)

what kind of a motor mount is that ?

StephenT

It is a hacker B 50 MM. It was not used on the Extra 300. Great planes GB fits both the AXI and JETI and the MM. I used it on My E-Magic.



This is what I used on the Extra. A Greatplanes .40 mount with the JETI cinched in with a hose clamp.
It makes motor alignment easy.

3dandpatternflyer

check out my dad's conversion here: http://www.rcuniverse.com/forum/Mode...2157054/tm.htm

pcampjax

My Feedback: (1)

I'm just finishing up a Graupner E300 following Greg's conversion suggestions.

AXI 4120/18
14X7 Prop
Jeti 77 Opto
Ultimate BEC
6S3P 6000 mAh Thunder Power LiPo.
I also went with standard servos and receiver.

I's could have it flying this weekend if my 6mm prop shaft adapter would come in...[>:]

Greg Covey

You'll like the Graupner Extra 300S design. It flies very well and lands softly.

If you need more power, don't be afraid to try a 15x8 prop in place of your 14x7 prop. There is still good ground clearance.

Good luck!

pcampjax

My Feedback: (1)

Well I just put four flights on the Extra. What a great plane! See my previous post regarding my setup. I checked the wattage with a freshly charged LiPo and at full throttle am pulling 580 Watts at half throttle 280. She flies like a rocket a full throttle so most of my flying is at 1/2 throttle. At full throttle it almost unlimited vertical! Because of the size and length of my LiPo's I mounted them as far forward as I could and with that I had to add about 9 oz of lead in the nose. When I say the batteries are far forward I mean it, I cut out a large hole through the firewall where the batteries run through so far forward they almost touch back of the motor. All out weight is about 8 lbs. Still it flies great. Inverted flight requires slight down (just breath on it).
The only "bad" tendency it has (I think it's because of the higher wing loading) is with the recommended elevator throw she wants to snap at full up elevator deflection. I just took some throw out and it’s a little better.
The guys at the field were impressed and one guy offered to buy it as is. He's probably going to build one for himself.

For those who are interested in building the E300S may I suggest using Greg's suggestions with regard to the LiPo's he used and exactly where he placed them. This way you'll keep the weight down.

All in all this is a great flying plane.

StephenT

pcampjax


My smaller 25 size Extra 300 conversion has the same speed and snap tendancy. I also fly most of flights on the low rate settings for elevator.
If I maintain speed the high rates are okay and there is no snap. Maybe its just that my thumbs are learning to adjust.