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Sport Planes (Formerly I/C & Gas Conversion) Discuss I/C or Gas Conversions, Aerobatic Planes and Sport Aircraft

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Old 01-17-2011, 03:59 AM   #1
RickAvery
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Default H-9 P-40 Maiden. YEA!!

I got to maiden my Hangar 9 P-40 this afternoon & all went very well! She was very stable and needed just a few clicks of down & right trim to fly level. As was the case with my H-9 Spitfire, I'm not happy with the performance of the 15x8 3 blade EMP prop. I put an APC 15.75x13 3 blade on the Spitty after cutting it down to ~15" and what a difference! I thought that with the P-40 coming in 2lbs. lighter than the Spit, I could get away with the smaller cut prop. Nope!! She'll get the prop mod ASAP. Unfortunately, the majority of the flight pics turned out blurry. I don't blame the phototog, as I know all too well how tough it can be to use the telephoto lense as the sun is setting and have the pics clear. Blus skies!

Rick


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Old 01-20-2011, 06:00 AM   #2
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Lookin good Rick. That's the same prop I ended up with on mine. Cut it down to 14x13x3, to gain more speed and still had plenty of thrust on an E-Flite 60 and 6S.
She's a great flying bird.

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 01-20-2011, 07:18 PM   #3
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Thanks GG. It was your suggestion that led me to cut the prop for the Spitfire. Quite a noticeable difference. I have since found out that APC makes a 15x13.5x3 prop. If I hadn't already purchased a 15.75x13x3 prop, I'd just buy one of those. I still might. Blue skies!

Rick
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Old 01-20-2011, 07:30 PM   #4
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Very Nice! Congrats on the success!

2012 SEFF Night Bowling Champion!
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Old 01-20-2011, 10:46 PM   #5
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What a beautiful airplane. Congratulations.

A bit of advice on photography. Take the pics at high res but zoomed OUT a bit, then use an editing program to crop what you don't want.

Much easier to get a good pic that way.

...The Bum
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Old 01-21-2011, 03:30 AM   #6
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Thanks guys for the kind words! It is cool to see them take off and fly for the first time & even better when they fly well. (although my heart rate on the first lap and the first landing is probably through the roof). This is very fun! Saddlebum, I'll suggest your pic taking techniques to the phototog. Thanks! The wife, I mean Santa, put an ASM F7F Tigercat under the tree, so that's up next. Yipeeee, a big, (82"), twin!!! My wallet is saying Ohhhhhh Noooooo!! Blue skies!!

RIck
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Old 01-21-2011, 09:44 PM   #7
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Rick here's what's going in my 90" P-38, would do your Tigercat quite well.

Motors x 2
http://www.hobbycity.com/hobbycity/s...idProduct=2097

ESC's x 2
http://www.hobbycity.com/hobbycity/s...idProduct=3730

Packs x 4
http://www.hobbycity.com/hobbycity/s...idProduct=8587


APC 15 x 13.5 x 3

90 amps total, 303 oz/19 POUNDS thrust, and 70 mph.

All for under $300.00.

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 01-22-2011, 07:02 AM   #8
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Hi GG,
Thanks for the reccommendations. I haven't started puting the components list together yet. I think I'm going to choose a higher kv motor the keep my battery cell count to 6s or less. The model should weigh right around 20-22lbs. If I can get 2400 to 2800watts or so I'd be happy. I'm looking at the Scorpion S-4020-8, and a set of CC 80 to 100amp ESCs on 5 cells. It's a bit of a wallet reamer, but quality stuff to be sure. I'm also considering the bargin route with the G-Force, G60, 410kv motor on 6cells. I going to try and spin APC 15x13.5x3 props if the ground clearence is there. 14" might be max, in which case I'll cut down the APC props to fit. Good luck on the P-38!! Waiting for a flight report! Blue skies!

RIck
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Old 01-24-2011, 04:34 AM   #9
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Going to need a lot lower kv motor Rick to spin those props.
Ball park 70+ amps on those two set ups, per motor, Scorpion on 5S, G60 on 6S.

The set up I listed is a 6S set up, 45 amps per motor....................

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 01-26-2011, 11:13 PM   #10
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puuurdy!

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Old 01-27-2011, 03:51 AM   #11
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Very nice....

Confucius say: "Man who go to bed wif itchy butt, may wake up wif smerry finga."
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Old 03-27-2011, 12:32 AM   #12
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Originally Posted by RickAvery View Post
I got to maiden my Hangar 9 P-40 this afternoon & all went very well! She was very stable and needed just a few clicks of down & right trim to fly level. As was the case with my H-9 Spitfire, I'm not happy with the performance of the 15x8 3 blade EMP prop. I put an APC 15.75x13 3 blade on the Spitty after cutting it down to ~15" and what a difference! I thought that with the P-40 coming in 2lbs. lighter than the Spit, I could get away with the smaller cut prop. Nope!! She'll get the prop mod ASAP. Unfortunately, the majority of the flight pics turned out blurry. I don't blame the phototog, as I know all too well how tough it can be to use the telephoto lense as the sun is setting and have the pics clear. Blus skies!

Rick
Rick, where did you find the APC 15.75x13.5x3 prop? I can only find 15.75x13x3's.
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Old 03-27-2011, 06:28 AM   #13
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APC makes a 15.75 x 13 x 3 , and also a 15 x 13.5 x 3. But no 15.75 x 13.5 x 3.

http://www.apcprop.com/SearchResults.asp?Cat=2

When I die, I want to go like my Grandfather did, in his sleep...... Not screaming like the passengers in his plane.
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Old 03-27-2011, 01:03 PM   #14
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Ya, I must have misread an earlier post.
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