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Old Aug 24, 2014, 02:10 PM
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United States, TX, Johnson City
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Great looking plane and great info.
Thanks
Twisted
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Old Aug 24, 2014, 02:44 PM
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Bricks are exploding off of buildings, snakes turning into sticks, cows giving condensed milk, birds huddled in the shade with squirrels and cats....it's too hot outside at the moment.....

So I opened up more space at the rear battery hatch underneath the pilots feet, continued to widen the front bulkhead mouth some more as well as dremel out some more room in the nose cone to allow for larger battery.....I can now stuff a GFORCE 4s 40C 3300mAh LiPo (350g's) into the battery base with ease and without coiling up the battery leads. Placing the back of the battery in first leaves the Deans connector out front. Connect the Deans connectors and push battery wires in on top of the battery into the battery compartment continues the natural bend of the battery wires....this is a much easier battery deployment. The nose cone needs only a small amount of dremel to make it easier for the battery wires to fit into its recessed area and without placing any pressure or hardship on the nose cone.

So if a 2600mAh gave me 5minutes.....a 3300mAh should be able to give me 6-7minutes even with the weight penalty.....now it's time to learn how to land this airframe a little on the heavy side!!!

Total flying weight via 3300mAh LiPo = 2233grams
Total flying weight via 2600mAh LiPo = 2164grams

It appears the GFORCE 40C 3300mAh LiPo sets back into the battery compartment enough to keep the COG within the 80-85mm placement....so the weight is pretty well distributed .....now I just need to get myself mentally ready to fly this thing on the heavy side of physics

TwistedGrin
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Old Aug 24, 2014, 08:38 PM
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United States, TX, Johnson City
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Twisted why are you getting such low flight times off the 2600, I would expect at less 9 minutes. Is the plane that heavy? Are the motors larger then 400.

Ken
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Old Aug 24, 2014, 09:09 PM
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Australia, VIC, Melbourne
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I don't think there would be a way to get 8-9mins on that battery. I was only getting 8min max from gentle puttering flying from my Spitfire with a 2800mAh 4S using a two blade prop. This is bigger, heavier, twin motored and has less efficient three blade props. 5mins sounds about right without stressing the battery.
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Old Aug 24, 2014, 10:40 PM
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Yep, I can compare flight times once again from the B-25 on a Zippy Compact 4s 25c 2700mAh LiPo... it gets around 5 minutes....the P-38's on that same battery can get around 6minutes. So the 5min mark on the 2600mAh is most likely about right on the BF110....the 3300mAh will have a weight penalty so we can't just add on battery storage alone in the consumption calculation.....I expect to get around 6-7 on the 3300mAh.

The 278gram Grayson 4s 30c 2600mAh LiPo in the forward nose balances this airframe at suggested COG (80-85mm).

The motors are 850's and swinging very aggressive 9x6x3 ( I think they could be considered 9x7's if you ask me)...but don't get me wrong I like the set up....this airframe gets along....I like it!!!

70grams additional weight more than my 2600mAh LiPo's should be a easily gobbled up by this airframes wing....lots of area at the fuselage. Kauz is getting 10minutes out of Zippy 3000mAh on his set up...so I am going conservative on 7minutes via 3300mAh. A quick and dirty on some similar LiPo:

Grayson Hobby Gold 4s 30c 2600mAh: 115x33.75x33.4 @ 278grams
HK Zippy Compact 4s 25c 2700mA: 137x44x23 @ 278grams
HK Zippy Compact 4s 20C 3000mAh: Not shown anymore
Motion R/C Admiral 4s 30c 3000mAh: 135x44x24 @ 310grams
HK Zippy Compact 4s 35c 3300mAh: 145x44x25 @ 350grams
Value Hobby GFORCE Elite 4s 40c 3300mAh: 136x44x28 @ 362grams
Value Hobby GFORCE Elite 4s 30C 3300mAh: 136x45x24 @ 320grams.....looks good
Killer Planes Preditor (FMS) 4s 30c 3300mAh: 134x45x23 @ 308grams...looks better!
Killer Planes Preditor (FMS) 4s 35c 3300mAh: 139x43.5x31.5 @ 370grams
Gens Ace 4s 25c 3300mAh: 137.81x42.71x30.36 @ 380grams
Motion RC Admiral 4s 40c 3600mAh: 135x45x30 @ 380grams
Motion RC Admiral Pro 4s 50c 3600mAh: 136x45x31 @ 376grams
HK ZIPPY Compact 4000mAh 4S 25C: 147x44x31mm @ 370grams
Motion RC Admiral 4s 30c 4000mAh: 135x45x32 @388grams

TwistedGrin
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Old Aug 24, 2014, 11:12 PM
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HK ZIPPY Compact 4000mAh 4S 25C: 147x44x31mm @ 370g

What aeromaniac and I are using. Well I will be when I finally get time to do a hatch

I was not far from getting the B-25 but decided I wanted the 110 more. From your description TG I'm now really glad of that as I'm off a moderate grass strip.
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Old Aug 25, 2014, 08:08 AM
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Aye 10:4 Griphin,

I am following you guys of course...interested in creating the "hatch" depending on how the 3300mAh LiPo performance goes......I may be springing for those lighter 30c 3300's too.

I like the B-25 .....but the small wheels can only handle perfect pitch grass.

The large wheels of this Dynam BF110 are excellent......YeeHaaaa!!!

TwistedGrin
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Old Aug 25, 2014, 10:33 AM
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I would NOT want to be the rear facing gunner in a BF110....looking at the tail all the time and then the heat from the gun not to mention the smoke and the occasional hot bullet casing in yer face. !!!

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Old Aug 25, 2014, 10:50 AM
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USA, TX, Corpus Christi
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Successful Maiden

I finally got mine into the air this weekend. On the first takeoff, I found the ground handling to be very poor, which was surprising. Once in the air, it was an easy flyer. It doesn't lack for power. I did the battery hatch mod and went with 4S 3300 60C batteries. Probably overkill, but it's what I use in my 70mm edf's. Landings with half flaps were no issue at all. Other than the poor ground handling, the only other issue I had was getting the retracts to initialize. I think maybe shimming the retract mounts to get a little more forward rake will help with the ground handling. I found as someone else mentioned, just point it into the wind and nail the throttle. Not a scale takeoff but...... All in all I think it is a keeper.
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Old Aug 25, 2014, 11:07 AM
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JpFlyer - Congrat's on a good flight and landing. Thanks for the write up and review too!!

What's your flight times on that 4s 60c 3300mAh LiPo??

TwistedGrin
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Old Aug 25, 2014, 11:40 AM
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Timer

Quote:
Originally Posted by TwistedGrin View Post
JpFlyer - Congrat's on a good flight and landing. Thanks for the write up and review too!!

What's your flight times on that 4s 60c 3300mAh LiPo??

TwistedGrin
I set my timer for 5 minutes. I haven't recharged the batteries to see what's left, but I think another minute or two is doable.
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Old Aug 25, 2014, 11:53 AM
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Quote:
Originally Posted by jpflyer View Post
I set my timer for 5 minutes. I haven't recharged the batteries to see what's left, but I think another minute or two is doable.
Ya I am interested to hear what you got....I flew for 5min via 2600mAh and came down with 3.82v...hoping larger LiPo will provide lots more air time. However the added weight may penalize the consumption curve....so appreciate the info when you get it

TwistedGrin
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Old Aug 25, 2014, 02:28 PM
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I would like to do the "hatch" and fly with a gforce 4000mah 4s. =D
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Old Aug 25, 2014, 03:38 PM
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Quote:
Originally Posted by jpflyer View Post
I finally got mine into the air this weekend. On the first takeoff, I found the ground handling to be very poor, which was surprising. Once in the air, it was an easy flyer. It doesn't lack for power. I did the battery hatch mod and went with 4S 3300 60C batteries. Probably overkill, but it's what I use in my 70mm edf's. Landings with half flaps were no issue at all. Other than the poor ground handling, the only other issue I had was getting the retracts to initialize. I think maybe shimming the retract mounts to get a little more forward rake will help with the ground handling. I found as someone else mentioned, just point it into the wind and nail the throttle. Not a scale takeoff but...... All in all I think it is a keeper.
JpFlyer - I have seven Dynam airframes...the only time I have experienced a retract not working was after I found a week connection on my "Y" cable. There is also about a 30second delay after the battery is initialized to the ESC. I have found if I try to toggle before the requisite retract chirp....nothing happens.

When you say poor ground handling....do you mean nose over during taxi or just squirrely to steer left right with the tail wheel?

TwistedGrin
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Old Aug 25, 2014, 04:11 PM
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retract s

Quote:
Originally Posted by TwistedGrin View Post
JpFlyer - I have seven Dynam airframes...the only time I have experienced a retract not working was after I found a week connection on my "Y" cable. There is also about a 30second delay after the battery is initialized to the ESC. I have found if I try to toggle before the requisite retract chirp....nothing happens.

When you say poor ground handling....do you mean nose over during taxi or just squirrely to steer left right with the tail wheel?

TwistedGrin
As to the retracts, it is usually one or the other that will not cycle. Unplug the battery and plug it back in, sometimes several times then they work in unison. It doesn't do that on my Dynam Me 262. As to ground handling, difficultly maintaining a straight takeoff roll, in a scale like manner.
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