Last I talked with Bob out at Tru-turn, they had thoughts about a special electric only spinner.. but we're reluctant to do it as it wouldn't tolerate an inexperienced used. Flex the backplate by tightening the cone too much and BOING.. lost spinner.

Ultracote is slightly heavier than Monokote.. Something like 1/2 ounce per square yard I think.

I found a link to the chart I used awhile ago.. http://webpages.charter.net/rcfu/Hel...IOCWeight.html

Good info.

In my new extra, I run 4 ubec's. Two are in redundancy on each receiver, so that if one fails, the other one takes over. This was custom done by kool flight systems and they had to add diodes, etc on each end to keep from back feeding.

end result? if one receiver goes bad I still have lots of redundancy. if one or even two packs goes bad I still have full power to both receivers... if one ubec goes bad I still have total power as well...

Rob

the pic shows the 4 ubecs at the top of the page

Hello Guys,
Did you check out the new Irate lipolly cells they are supposed to be rated at a 10c discharge. And the biggest cell is 2600 ma I think. So maybe you can use less cels.
cheapbatterypacks.com has them.
There is also tanicpacs.com that sel the same lipolly cels in pacs, under a different name.
Check them out. I havent done the math so I don't know if they would be lighter then the TP packs, but it sounds as if they would be.
A 3p pack of the above mentioned cells should give you about 78 amps dicharge vs 48 amps for the TP You could even go to a 2p pack and still have 52 amps available.
I'm in not selling these cels, I'm also starting to get intersted in this electrical stuff, and have been doing some research.

John Salas

Checking the website data on the Irate's, it looks like a 3p pack of them would weigh slightly more then the 4p Thunderpower pack. A 2p Irate would weigh about the same as a 3p Thunderpower.

Not sure about current capability, that is still the big question.

Anybody using the Irate's?

How about the 2200's you get 66 amps for a 3p, I dont know the weight of the TP cells so I cant compare.

John

p3 ao40tkikeo309402-049402olrikfr94..........i'm confused[sm=confused.gif][sm=drowning.gif]

Raptor, so was I, but after some research i kinda got the hang of it. Some good info in the electric forum and also on rcgroups.com

John

When we did the watt meter test, it was drawing 65-67A on the ground, fully charged. I'd imagine it could get slightly higher in flight.

I didn't think about the dual UBEC's but makes sense.

I've seen some prototype TT electric spinners and they are lighter than the standard ones. I agree 100% with the concerns they have with over tightening, I've been known to bend a few lightened backplates. But I've learned with the electrics not to be so heavy handed.

Actually the current should drop slightly as the load is reduced. Weight savings using dual UBEC should be at least 2 ounces over a 2000mah Duralite Plus. I'd wonder about just running a single UBEC. I'd be tempted to use one and save another 20 grams.

Did you ever decide on a color scheme ?

Look on the internet

www.plprod.com

click on the picture of the pretty girl.
you can't read it unless you read french but lots of great color pictures

tommy s

Guys

How exactly are you attaching the prop to the motor. The shaft on Tony's motor sure looks like a YS crank shaft and thrust washer. Is that a commercial adapter, or is the end of a crank cut and drilled for the motor's shaft?

What you see in the pic is exactly what is supplied by Hacker. It's threaded 1/4-28, and the spinner and prop go on like any motor.

I just found a source for aluminum prop adapters for the Tru-Turn spinner. With that a few other things it's looking like I just might hit the weight limit.

Also, thanks for the PL link. I have researched that site for schemes. The one I think I'm going to use is a scheme I saw on a CA Models Fantasy.

Tony,

Where did you get the aluminum prop adapter for the Tru-turn? I'd like to get one myself.

Latest Flying Models mag in the U/C Stunt column.

http://www.us-aero.com/

Tony,

this is a great project,

do you mind posting some pics of the plane when you get a chance?

I looked at a pl lazulite last fall but they wanted so much for it.. Where did you get the kit?

are you using 8411's?

Are you aware of any potential CG issues? usually mods like this to a glow airframe make it hard to get the CG far enough forward.. Have you received your batteries yet?


Rob

Hi Rob,

I will definitely post pics of the finished model, along with some other data. I'm in the final stages of finishing the model right now.

I bought the kit from Central Hobbies about 8 months ago. They will not be bringing any more in, so getting PL stuff in the USA may be tough.

I'm using an 8411SA on the rudder, and 9411SA's on everything else. If I need more on the ailerons, I made the servo box large enough to instal 8411's.

CG shouldn't be a problem. I've got two sets of batteries, and one quick rough check seemed to show I could easily move them to get the CG. I'll know that accurately later this week.

How close are you Tony? I should be ready to do radio install this week. Still waiting on my batteries though.. hopefully today.

I'm going to fly this weekend, even if the fuse is unpainted. Probably Saturday, definitely Sunday. Come on up if you like!

Now thats a cool plane...Lets see some 3D too!!! I love the idea of electric conversions but that setup must be around 2 grand...right???[sm=confused.gif] im confucilicous

I did a quick and dirty calculation and it looks more like 3K to me and that's with only one set of batteries. Add another 750 for the second set.

Sam

3 grand?

Motor $400
SC - $200
Batt - $750 x 2

Total - $2100 for the power system.

Plus a couple of chargers and some odds and ends

minus a throttle servo, fuel tank,lots and lots of fuel at 50 bucks a case, 409 to clean the grease off the plane, starters, glow plugs, chicken sticks, receiver batteries and their respective charger.

The real test with the E. planes will be how long do the batteries and motors last. If for ever it's cheap otherwise the prices will have to drop dramatically to become mainstream. Mike

Doug,

I put the cost of the plane in the 3K.

Sam