TOMAPOWA

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Well... I splurged for a large scale (101" wingspan) 100cc SU-26 Sukhoi ARF... relatively cheap for its size, which had me a bit concerned, but upon delivery... it's an awesome, well-built airplane! Originally designed for a 100cc gasser... I plan to convert to electric... my biggest yet!

Nitroplanes had them on sale all winter... could not resist for the price!
http://www.nitroplanes.com/su26100cc101.html

I plan to use a 100cc brushless motor from Hobby King.

http://www.hobbyking.com/hobbyking/s...dProduct=14427

A good friend of mine from France purchased this motor for a large scale Carden ARF he converted to electric and said it packs quite a punch, and for the price you can not go wrong (something comparable like a large 100cc Hacker will cost around $800-900). Can't wait to get going on this project (maybe this weekend). I'm going to get a CF wing tube for it though since the aluminum one they provided appears fairly heavy for my liking (HK upgraded the tube from a 25mm to a 38mm tube, since some customers were experiencing failure of the original 28mm thin-walled tube).

I plan to use four (4) 5800maH 6s packs in a 12s2p configuration (11,600maH, 12s), along with a Castle Creations HV160 ESC and probably a 3-bladed Mejzlik 30" CF prop. It's a monster (will barely fit in my minivan) but should float like a kite. The expected weight should be around 28-30 pounds (my 89" electric A6M5 Zero weighs 28 lbs so this should be a joy to fly). I'll try to post some pics and updates as they occur... hopefully sooner than later!

F4 d best

Hi Tomapowa,

Do you have any updates on your 100cc electric set-up.

I would like to do the same but I would like to see some results and recomendations so I go in the right direction.

Can you post some photos of your set-up please?

Many thanks and regards.

Mario

TOMAPOWA

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Hi Mario,
Yeh, I got quite a bit done and have been taking pics here and there... just havn't had time to post yet but will do so soon... This thing was a little worse then I had thought... particularly the canopy which did not fit correctly at all... though the manual shows it in pics (you have to supposedly glue the plastic canopy on the frame)... mine came preassmebled and assembled wrong to boot... lots of shimming and sanding.

So far some of the issues I've encountered are:

1. Canopy came preassembled and did not fit correctly... 1/8+" short and out of square... the plastic used is cheap and not uniform
2. Hardware that came with airplane not only was insufficient, but it did not come with enought hardware for 2 servos in each wing.
3. The engine box needs to be reinforced... seriously!
4) The landing gear also needed reinforcement... one heavy landing would had tore the LG off...
5) The supplied wing tube was a little too wide... very difficult to get into either of the wings... (I'm using a CF one now)

I'll try to post some pics and text in the very near future... just trying to get work done on it quickly so I can fly her this summer!

Scratchie

.

TOMAPOWA

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Most my large electrics are typically a bit heavier than glow/gas versions due to batteries mainly (this Sukhoi will use 4 6s packs that weigh a total of 7 pounds!). Performance is subjective... thought I have found that smaller electrics boast a marked improvement in thrust/weight ratios. I tend to go the extreme with electrics... for one, it's a challenge since no one has done it yet, plus I'm an electrical engineer... nuf said! When it comes to a price tag, I now find that I can set up a large 1/4+ scale plane with electrics for the same price as setting up a gasser... 4-5 years ago, I could not say that. Actually, this 101" Sukhoi I set up came out $400 cheaper than a gasser... alone, the engine was $400 where a 100cc DA is 3x that price when setup with exhaust, etc...

TOMAPOWA

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A few videos of the 1st and 2nd run-up (2nd run-up, I tweaked ESC settings to get optimum current draw with max RPM). 7000+rpm pulling 150-160 amps... This thing is going to be ballistic!

http://www.youtube.com/watch?v=ZJez5ZP8Jc0

http://www.youtube.com/watch?v=0IEFmqLGxts

fc227

I know this is a old thread , But do you still have the plane ? I just acquired the same plane , air frame only. Just wondering how you like the electric?

TOMAPOWA

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Hi Fred,
Yeh been a while since I wandered on here and posted.... Yeh,still have the plane and flown maybe 6-7 times... a big floater actually... flies like it's on rails too. Big plane though and takes some effort to get down to the field so haven't flown as much as I would like. I'll try to post a video on here soon... think I have the 2nd flight on video somewhere on YouTube.

TOMAPOWA

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Ha... here's the maiden flight.... short and uneventful...
https://www.youtube.com/watch?v=WhWzAt0-krs

fc227

Looks good, Thank you