Electric IMAC Plane poll?

[sideways]

I'm going with the tried and true Hacker C50-14XL, with a Masterspin 99 from memory.
Running 2 x 5S (10S) in probably a 5000 mAh Zipp-H pack, maybe slightly bigger.

Everything is with the builder so i can't do pictures or anything.

The plane is a Tempest, designed by John Payne.
I'm having mine built ready to paint and cover, but you can buy them as a kit.

	Quote: Originally Posted by Haggy
	What plane and setup are you running - or planning on running??? Cheers Chris

[BoneDoc]

That will work on a pattern plane, but it's a tad small for a 50cc conversion.

[Radioactive]

Great combo, but not enought for imac... basic would be fine, as it's an open/intro class, so bring, and fly what you have!! I'd love to fly an electric 35% or larger for IMAC, but i do not believe we can get in two sequences;( without landing in between) , with current technology, especially if it was windy! I do believe we are inching closer with new Battery technology etc!

[sideways]

Not sure who said it was an Imac setup?.....It's a Pattern Plane.
He asked about it, I answered.....

There's actual not much difference in size between this and my Comp-Arf 2.1
The big issue is the weight. It's around 2kg lighter than your average 50cc plane.
I guess to be fair the scale planes have more drag.
But seriously, how much power do you need, this setup is good enough for many of the name-brand pilots in F3A.

My point is, if someone with more time than me built a plane like this, but moved the canopy back and added a cowl to make it look like an extra, all within the 10% rule, why wouldn't it fly? (Yes i know there's a bit more to it, but you get the picture)

And yes you could fly this plane in the basic class, but that would be unfair to the other competitors, . The only chance they would have is that i can't fly for St.

[BoneDoc]

Well, I don't even know where the "question" is?

The question of the thread is for IMAC, hence an IMAC plane, presumably a 50cc at the smallest. I wasn't refuting your claim, I was simply clarifying in case others would want to copy your setup for their 50cc conversions.

[rmarsden]

	Quote: Originally Posted by Radioactive
	Great combo, but not enought for imac... basic would be fine, as it's an open/intro class, so bring, and fly what you have!! I'd love to fly an electric 35% or larger for IMAC, but i do not believe we can get in two sequences;( without landing in between) , with current technology, especially if it was windy! I do believe we are inching closer with new Battery technology etc!

Much closer than you think. Here in San Diego, there are two pilots flying ~90 inch wingspan planes which easily complete Intermediate IMAC sequences twice and have been doing so for the past three years. One is a 2.3 meter Comp-Arf Extra 330L and the other a 30% QuiQue Yak-54 - flown by RayFulks and Pedro Brantuas. These will soon be joined by a pair of 101 inch QuiQue Yaks which should also be able to complete the sequence twice.

Their success obtains from using the right combination of motor and prop to provide optimum efficiency. The motors are Neu 2215 series with gearboxes. The props are custom made 28x20 wooden props. The high pitch on the prop allows it to turn more slowly to obtain the same pitch speed and thereby maximize efficiency. This likely has the secondary benefit of reducing P-factor since there is less angular momentum stored in the more slowly turning prop.

The two new planes will both be using Neu 2230 series motors with gearboxes. As soon as they fly, I'll let this forum know the results. I hope to see them both in our next EMAC on May 9 or at our SEFSD Spring Fling Exhibition May 15-17.

[1bwana1]

EMAC has certainly proved that electric power can be setup to fly IMAC sequences well. I think Josh (BoneDoc) was also able to fly two Sportsman sequences with his 89" 3D Hobbyshop AJ-Slick with no problem.

Hey Josh, how are things going back in Texas? Sorry, I didn't get to say goodbye in person before you left. We all miss seeing you and the girls at the field.

-Steve-

[ou7475]

Hi all just wanted to post my recent findings. I will fly Basic Imac this year again with the following set up:

AW Extra 300 100cc plane I took around 18 oz of wood out of the plane by just removing the pipe tunnels and trays in middle and back and about 4 oz out of the Canopy. I used Ti racebolts and Ti washers with PSP standoffs for a 3.8 oz motor mount. CF wing tube Stab tube and waiting on LG but no one makes them yet. TI Axials and TBM lite tires with CF Spinner. My AUW with out flight packs is 22 pds.
32.8 oz running 9200 16S4p A123 yes that is right A123 yes tab bit on the heavy side compared to several AW 100cc Yaks and 260 at my field that were 29.10 and 29.6 and 29.4 with out 32oz of fuel.
They are turning 27*10 TH Mejzlik 6500-6600 Rpm and fly very well vs my 27*12 TH Mejzlik @ 42.6 Volts 192Amps @ 7340 Rpm is very very impressive.

2. A123 16S3p 6900 a savings of 2.4 pds making my plane AUW lighter than my peers 30.4 pds. i have not flown this yet for 2 sequences on basic but think i might be able too with the right throttle management.

3. Lastly I have 4 6S1p 5450mah Eon lite coming at 6.3 pds so 12S2p @ 80 percent is 8720 flight usable Mah on lipo but AUW is 28.3 pds much lighter plane than my peers before their fuel. i have only flown my plane a few times because of bad weather in okla but at 32 pds it flys very well and has tons of power. Will be playing around with other set up soon possible 5450 Eon 12S3p and will let you know! I also started a thread on FG AW extra 300 Electric.

[gareth.ky]

That's gonna be awesome!

[gdryer]

Wow. One of our IMAC team has a member flys the same plane on a DA-100 and it performs very well. I look forward to your results as I am thinking about a bigger plane for next years IMAC. Currrently I am flying Basic using a Hangar 9 Sukhoi (electric). I assume that you are using the Jeti ESC?

[sweetpea]

I met a guy out here in the NW that was flying a 35% plane on an Hobby King electric setup. It flew just fine sequences.

[timbo0279]

I have flown a fair bit of electric gear.. nothing as big as 25% or upwards... and I think its absolutely awesome.. plug and play.. no mess no fuss.. no tuning... and it may be on my list of things to do in terms of GS.. one day..

But as far as the environment is concerned.... and reducing carbon emisions etc etc etc.. people loose sight of the fact that the carbon footprint used to make these highly toxic batteries (Lithium polymer, a123 bla bla bla) is often just as large if not larger than using a petrol engine for the life of your model.... There is a reason why you can look directly at the sun whilst in china... and its because your having to look through the mind blowing volume of toxic fumes etc etc pumped out of the factories while making the massive volumes of batteries (and allother kinds of hardware) that we use, damage, discard every day...

For me.. the switch to electric wouldnt be a move to save the environment, it would be for the benefit of no mess no fuss and reducing noise levels etc etc etc.... cause as far as I am concerned.. I dont think we are doing the planet any favours by switching over....

oh and I voted yes... heh heh heh

[Gil]

	Quote: Originally Posted by timbo0279
	For me.. the switch to electric wouldnt be a move to save the environment, it would be for the benefit of no mess no fuss and reducing noise levels etc etc etc.... cause as far as I am concerned.. I dont think we are doing the planet any favours by switching over....

Hear! Hear!

[gdryer]

	Quote: Originally Posted by sweetpea
	I met a guy out here in the NW that was flying a 35% plane on an Hobby King electric setup. It flew just fine sequences.

That might have been me!

Hangar 9 Sukhoi 33%, Turnigy 80-100-130, Turnigy K-Force 120Amp ESC, Turnigy 6S-4000 batteries x 4 (12S2P).

[fastace]

a well set up electric IMAC model will perform just as good as the gasser IMAC model. same goes for PATTERN models . back in my early days of Pattern flying with some greats such as Hanno Prettner and top aussie pilot Tom Prosser, they and i both said; one day these models will have electric motors fitted and sure enough 20 plus years later , they do. Electric propulsion areobatic models etc etc is very very big in Europe, were abit behind over down under.