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Author Topic: McFarland's Akromaster 1st flights  (Read 938 times)

Offline Dick Carville

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McFarland's Akromaster 1st flights
« on: March 14, 2012, 01:19:03 PM »
Since Will Moore posted my new ship here; I thought I'd let folks know how the 1st flights went.

 Set up : Arrowwind  3526/05 685KV motor TP Bat 5S 2700 mah FM 9 timer

I statred with 2.5 min flights -was very disappointed . Plane took off and landed great grooved , but turn was very poor


Switched from the 13X4.5  pusher to  a 13X5.5 I got from Dennis A . It was much better ,but still not right. The glide told me it could use  a bit of nose weight, but the turn said tail weight for sure
- confusing!
I have lost of things in this ship I don't normally use IE. flex lead outs ; 4 inch bellcrank' Tom Morris controls.

I usually make my own control horns , but decided to try Tom's double  flap and elev horns this time.

After four 2.5 min flights I knew  something was wrong ( honestly I thought I built a dog!)

I had set the control throws with a trow meeter that I use for RC . Then I started looking at Tom Morris' data sheets for his horns. The sheet said I should have the elv horn bottomed out  close  to the horn wire to achieve a 1to1 ratio.  I had it at about the half way point.  I changed the ratio per Tom's sheet and ignored the throw meeter. I flew complete patterns today and am real happy The ship has corner and goes where I aim it

I Am using a bit more Bat power than I hoped for but I can live with it. I'm using about 2300mah of the 2700mah

I like the two ST 60 ships I converted to elect last seasion ,but this  ship has the potential to cause me to leave them hanging on the wall









Offline Wynn Robins

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Re: McFarland's Akromaster 1st flights
« Reply #1 on: March 14, 2012, 01:54:58 PM »
hey Dick - Nice to hear you got it sorted - It sure looks  nice model and would have been a shame if it didnt perform.

In the battle of airplane versus ground, the ground is yet to lose

Offline linheart smith

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Re: McFarland's Akromaster 1st flights
« Reply #2 on: March 15, 2012, 07:39:19 AM »
Hi Dick,

It looks good.  Cannot wait until Sunday to see it in action at Wrentham,  Ma.


Linheart
linheart

Offline Will Moore

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Re: McFarland's Akromaster 1st flights
« Reply #3 on: March 15, 2012, 04:05:46 PM »
Ditto Lin's comment, Dick !  Beautiful lines on that airplane.

We will see you this Sunday at the Wrentham field.

Now there are three of us flying competitively here in New England
Things take longer to happen than you think they will,

Then they happen much faster than you thought they could.
 AMA # 209

Offline Dean Pappas

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Re: McFarland's Akromaster 1st flights
« Reply #4 on: March 15, 2012, 09:12:36 PM »
I'm glad it's working better, Dick ... but how could the throw meter lie? HB~>
Regards,
  Dean P.
Dean Pappas

Offline Dick Carville

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Re: McFarland's Akromaster 1st flights
« Reply #5 on: March 18, 2012, 03:41:24 PM »
Hi Dean

I can't explain how or why the meter could be wrong. It does not make sense to me either.  It's a simple protractor with inch measurements on one side and metric on the other. I was carefull using it multiple times and thought I had about 35 degrees travel with a ratio of one to one

BUT when I examined where I had the adjustable elevator it was in the mid point of the range . The range is 3/4 inch to 1 inch. The elev push rod is in the flap horn  at 3/4 inch, so when I moved the elev horn to 3/4 I had to be at the mechanical 1 to 1 and the meter says I have more Elev than flap

The good news it now flies fine. I have  6 complete patterns on it and I'm very satisfied with how it flys

Dick

Offline Dick Carville

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Re: McFarland's Akromaster 1st flights
« Reply #6 on: March 19, 2012, 09:22:50 AM »
Hi TY


Here a a couple of pics of the elect area( hope I can post more than one. Every time I try to put up two pics it tells me "too much data")

The top hatch is OK ,but I think I'll go back to the bottom hatch on the next one. It's no big deal turning the model over on a rack and I like the access much better. You may not be able to see it but I had to use two hatches. The top hatch for the battery and a traditional cowling so I can get the motor in and out

Offline john e. holliday

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Re: McFarland's Akromaster 1st flights
« Reply #7 on: March 21, 2012, 08:53:36 AM »
What a night mare!   n~   Would hate to trouble shoot that. H^^
John E. "DOC" Holliday
10421 West 56th Terrace
Shawnee, KANSAS  66203
AMA 23530  Have fun as I have and I am still breaking a record.


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