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Posted by 7rider | Aug 29, 2011 @ 01:04 AM | 4,140 Views
Power 25 1250kv APC 10x7E tests for P-47 with stock collet and Dimension Engineering SportBEC.

3S with Exceed 60A Opto ESC and Zippy 2650 3S 30C

Full throttle
467 Watts
41.9 Amps

4S with Exceed 60A Opto ESC and SkyLipo 2200 4S 20C 40C Burst

Full Throttle
932 Watts
63.2 Amps

About 2/3 throttle
493 Watts
32.9 Amps

418 Watts
26.82 Amps

What's interesting is the 4S produces more watts with less amps than the 3S if you compare the 467 watts (3S) and 493 watts (4S) figures.
As long as one doesn't go full throttle with the 10x7 on 4S, it looks like a good prop to go with for 3S and 4S since the E-Flite Power 25 1250kv has these specs regarding amps:

Continuous Current: 50A
Maximum Burst Current: 58A (15 sec)

Edit 11/18/2011: Regarding this statement:

What's interesting is the 4S produces more watts with less amps than the 3S if you compare the 467 watts (3S) and 493 watts (4S) figures.
I now know the answer after listening to Lucien Miller on ATTF. Basically, if you increase the voltage by going from a 3S to 4S battery, you need less amps to generate a given watt number which is why you go to a higher voltage battery when you need to generate more watts.
Posted by 7rider | Aug 22, 2011 @ 12:59 AM | 4,392 Views
Flew 4S for the first time on any plane tonight with the following setup for my P-47:

E-flite Power 25 1250kv (it turned out the 870kv I thought I had purchased with the P-47 was actually a 1250kv)
Exceed 60A OPTO Brushless Speed Controller ESC (w/o BEC)
Dimension Engineering SportBEC
APC 10x5E
SkyLipo 2200 4S 20C (40C burst)

And all I can say is WOW! The burst of power when I go full throttle took a few times to get used to. Along with the installed retracts and flaps, I added 14g of lead on the inside of the air flow exhaust to counteract any any extra weight up front.
Posted by 7rider | Aug 01, 2011 @ 01:00 AM | 3,380 Views
I enjoyed a few flights with my Parkzone P-47 today using both 2650 and 2200 3s batteries. The power system is an E-flite Power 25 870kv, Thunderbird 54 ESC, a Dimension Engineering SportBec, and an APC 10x7 prop. Landings were very smooth with flaps, but the plane rolls for a long time so I have to make sure to touch down early. I'm interested in putting in a 4S capable ESC so that I can use my two 4s 2200 batteries, although the present performance is fine. What's amazing is how quiet the E-flite Power 25 is. Someone asked if I had a motor on on when I was cruising a medium speed with the plane.

Edit 8/22/2011. I opened up the cowl to switch out the esc, and lo and behold, it was actually an E-flite Power 25 1250kv although the person I purchased it from said it was a 870kv. Pleasant surprise to see the more speedy motor.
Posted by 7rider | Jun 27, 2011 @ 11:59 AM | 3,905 Views
Tried to maiden my Parkzone P47 last Saturday, but the prop flew off the plane right as the plane was lifting into the air. Fortunately, the plane landed in thick brush and there was no damage. The problem is that the APC 10x7 E prop I have has a prop hub which is slightly too thin for the stock collet prop adapter so that the spinner nut has nothing to push against to force the prop and collet down tight against the 5mm shaft of the E-Flite Power 25 motor. Before it has a chance to do this, the spinner nut hits the flush area of the collet and runs out of thread. To remedy this, all I needed to do was to purchase an 11 cent zinc 1/4" washer from Orchard Supply Hardware and put it behind the prop to lift the prop hub about 1/16". This was all the height that was needed so that there was thread left for the spinner nut to tighten the prop and the collet. I suspect the Parkzone 2 blade prop suggested for the P-47 has a thicker prop hub than the APC E prop hub.

Edit 8/22/2011. Upon closer examination, it appeared the the APC 10x7 E had been reamed a little wider than necessary which is why the washer was needed.
Posted by 7rider | Apr 08, 2011 @ 03:04 PM | 4,057 Views
I found out yesterday how much easier it is to solder on a Deans with a chisel tip vs. a pointed tip. With a chisel tip, you have a lot more surface area to transmit the heat and melt the solder. I don't believe how much aggravation I would have saved if I had been soldering Deans connectors with a chisel tip from the beginning. Hat tip to Lucien Miller for his great video which shows him using a chisel tip:

How to Properly Solder a Deans Connector by Innov8tive Designs (9 min 15 sec)

Posted by 7rider | Mar 05, 2011 @ 09:25 PM | 4,066 Views
Hyperion ZS2213-22 862KV motor
Castle Creations Thunderbird 18 esc
APC 11x4.7 SF Prop
Spektrum AR500 receiver
4 x Emax ES08MA metal gear servos
Dubros micro pull-pull
Posted by 7rider | Feb 24, 2011 @ 01:30 AM | 4,137 Views
Twisted Hobbys Vector built with 24g Blue Wonder, Turnigy Plush 12 amp ESC, three HXT 900 servos, and Spektrum AR6110E receiver. Fly with 500 2s, 800 2s, or 500 3S batteries with an APC 9x4.7 Slow Fly Prop. Mainly used Welder Glue to assemble plane. Great for practicing hovering and harriers.
Posted by 7rider | Feb 24, 2011 @ 01:13 AM | 3,674 Views
I visited Bayfront Park in Menlo Park for the first time this afternoon around 4 PM. It's very easy to reach on the east end of Marsh Road off Highway 101.

It was too windy for me to control the Alula well, but the Merlin did great with the consistent afternoon wind. I would just get some altitude with the Merlin's motor and let the wind take it from there. The wind there makes me want to get a Weasel. I guess I should visit in the morning when the wind is less strong if I want more control over the Alula. The heavy groundcover was great for belly landings.

Posted by 7rider | Feb 17, 2011 @ 10:06 AM | 3,311 Views
I've been doing my first harriers and hovers with a Twisted Hobbys Vector, and an interesting for me is that if I visualize myself performing a hover while I'm doing a bicycle trackstand at a stoplight, it really helps me maintain the trackstand. This seems strange to me at first since the muscles involved in a 3D foamie hover and a bicycle trackstand are totally different, but perhaps the brain is dealing with some base fine motor nerve impulses for both activities which are similar.
Posted by 7rider | Feb 17, 2011 @ 10:03 AM | 3,954 Views
Just did a test bind of an OrangeRX receiver, and it bound very quickly with my Spektrum DX-7. It seemed to bind even faster than some of my Spektrum receivers. I'll do a range test in the next week, but I'll still probably be only using this receiver with parkflyer, close-in foamies.
Posted by 7rider | Jan 28, 2011 @ 01:03 PM | 3,836 Views
Felt a little dizzy inhaling the toluene fumes from the Welder Glue I used to assemble the Twisted Hobbys Vector earlier this week. It reminded me of the Testors Glue I used when I was a kid. After that first time using Welder Glue, I now only use it outside or in a larger room with open windows. I built my first EPP hinges with Welder Glue this week, and they are pretty amazing in their durability and flexibility.

I added a Hyperion Servo Rate Adjuster to my Fun Cub. One of the channels wasn't working, so I had to attach the Y extension to the channel that was working. The pot was also a little bit difficult to access underneath the cut shrinkwrap. The flaps do look a lot cooler now that they're slowed down, and they should help mitigate the ballooning effect when I initiate them.
Posted by 7rider | Jan 18, 2011 @ 02:00 AM | 3,787 Views
Maiden on 1/16/2011

HeadsUpRC 3536-10 (105g)
Suppo 40A with Castle Creations 10A BEC - used a Great Planes Deans Parallel adapter to connect to a 3s/2200a battery.
Prop: 11x5.5 APC
Servos: (Elevator & Rudder: Hitec HS-81), (Ailerons & Flaps: EMAX ES08MA Metal Gear Sub Micro Servo)
Receiver: Spektrum AR6200

Aluminum motor mount provided by Sotog on rcgroups.

Beefed up landing gear with extra piano wire attached with shrink tubing.

Sharpie markers used to decorate the plane.
Posted by 7rider | Dec 11, 2010 @ 04:45 PM | 3,801 Views
When I initially put on the wheel pants for my 3DHS SHP, I tightened the bolts and I heard a cracking sound, meaning I had cracked the epoxy and fiberglass structure of the wheel pants. I tried not to overtighten the bolts, but I wanted to make sure the wheel pants were on securely. I still kept the pants on, but on my first landing one of the pants cracked enough so that it became loose.

In order to remedy the situation, I applied Mr. Sticky`s Underwater Glue to the contact areas where the wheel pants meet the bolt and the landing gear. The reason I used this type of epoxy is because it's flexible. So not only does it reinforce and fix that area of the wheel pant where there's stress, it's flexibility also keeps it from cracking in the future.

On future 3DHS wheel pant installations, I'll always add the Mr. Sticky`s Underwater Glue to the wheel pants before my first flight.

It appears Devcon also has a competing product now called Devcon H2 Hold Underwater Wet Dry Epoxy.
Posted by 7rider | Nov 30, 2010 @ 08:45 PM | 4,136 Views
Landed the ParkZone BF-109 twice last Friday without a noseover. On Sunday, I maidened a 3DHS SHP V2 47" I purchased from a RCGroups member who also happens to be a fellow flyer at RSA. I just needed to give a few clicks of elevator for it to glide instead of dip with the throttle off, and the rest of the flight was fun. One of the wheel pants cracked a little upon landing, and I'm going to fly sans pants for awhile. If I put the pants back on, I'm going to put some dense foam between where the pants and the landing gear meet since when you crank down the wheel bolt, it puts a lot of pressure on the fiberglass pants.
Posted by 7rider | Nov 05, 2010 @ 01:10 PM | 3,757 Views
Maidened Multiplex Merlin V2 yesterday at RSA. E helped with the launch, and the flight and landing went well. The Merlin V2 build includes the Himax 2212-1180, 8x5 prop, Thunderbird 18 ESC, four HS-55 servos, and an AR6255 receiver. I flew the Merlin twice. Once with a 500 mAh Blue Lipo and the other time with a 800 mAh Blue Lipo. I noticed some sound with the engine at full throttle, and I'm wondering if there might be a bearing issue since this is the engine from the V1 crash with a new bell and shaft. The heavy duty filament tape did a great job of protecting the belly of the fuselage on its hard dirt landings. Looking forward to more Merlin flights this weekend.
Posted by 7rider | Oct 31, 2010 @ 11:23 PM | 6,142 Views
Planned the plane with Halloween colors, but when my son saw the plane he said, "It's a Giants plane!"
Posted by 7rider | Oct 11, 2010 @ 05:57 PM | 3,361 Views
Flew the ParkZone Sukhoi-26 XP quite a bit at the local park yesterday. The rolls and snap rolls are spectacular with the plane. First time I flew the batteries out till they pulsed. Nice plane to fly with some wind. Can't wait to see a slightly larger monoplane with Horizon Hobby's new brushless micro brick they're using for the Beast UMX.
Posted by 7rider | Oct 10, 2010 @ 12:36 PM | 4,505 Views
Maidened the Gee Bee Y yesterday. It was a bit nose heavy with the Turnigy 2217-1050 up front with a Zippy 2200 3S. I'll have to try a lighter battery next time or add some weight to the rear. Landing was not pretty, and cracked one of the wheel pants, crunched in the bottom attachment of the firewall screw mount. Even with the low rates and expo I had on the plane, it was a fast and nervous flight. I hope to have more fun next time by moving the CG rearward, using a lighter battery, and adding more expo to the elevator.
Posted by 7rider | Oct 10, 2010 @ 12:14 PM | 4,773 Views
The stock wire landing gear on Multiplex planes like the Gemini, Acromaster, Easy Cub, and Fun Cub can be too flexible and bouncy. When I purchased an Acromaster from Draknkep, I noticed how he made his landing gear stiffer by attaching an additional wire to his landing gear with shrink tubing.

I did the same thing this morning with 3/32" wire for the landing gear on my Fun Cub. It was a quick mod, and the landing gear is noticeably stiffer.