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the prefect platform for aerial photography

Old 10-03-2006, 03:38 PM
  #51  
steve_molmer
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Default RE: the prefect platform for aerial photography

Flyfast1 :
With the ground clearance of the lift master you can strap a very large camcorder to the main gear without a problem.
I have a Friend in FL. that uses a large camcorder on his lift master to record video all over the Orlando area.
It works very well, the plane doesn't even notice the extra load of the recorder and battery packs.
I will ask him to send me some video in a week or so so you can take a look.

It is not a good idea to strap a camera on top of the plane "in line" with the prop wash.
I have tried this in the past with very bad results on other large models
Old 10-03-2006, 06:00 PM
  #52  
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Default RE: the prefect platform for aerial photography

Steve,

What is the problem with mounting a camera on top of the wing directly in line with the prop wash?

I called Cedar Hobbies today about the Lift Meister. They do not have any and the next shipment is due in November, so they put me on a waiting list.


-Ed
Old 10-04-2006, 10:52 AM
  #53  
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Default RE: the prefect platform for aerial photography

Flyfast1 :
When you place an object that big at that point on the wing you block a good bit of the air from hitting the tail surfaces.
This is a real problem on a tail dragger at takeoff and landing.
Rout the exhaust off to one side of the plane and mount the camcorder to the main gear against the fuse.
This is the idea place for the camera.
Old 10-04-2006, 11:12 AM
  #54  
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Default RE: the prefect platform for aerial photography

This is a ground test of the complete system on the lift master.
note that the vibration on this video clears after the dampeners warm up on the engine mount.
I fixed that this morning. Issue was a bad mounting clip on the gear.
here is the link. http://media.putfile.com/low-res-ground-test-10-01-06
Old 10-04-2006, 12:09 PM
  #55  
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Default RE: the prefect platform for aerial photography


ORIGINAL: Flyfast1


I called Cedar Hobbies today about the Lift Meister. They do not have any and the next shipment is due in November, so they put me on a waiting list.


-Ed
Im not suprised that those sell out as soon as they get them, looks like a really great airframe. I might have to get on the waiting list myself

JettPilot
Old 10-05-2006, 05:28 PM
  #56  
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Default RE: the prefect platform for aerial photography

JettPilot,

How do you mount your camera to the wing?

-Ed
Old 10-05-2006, 11:16 PM
  #57  
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Default RE: the prefect platform for aerial photography

Sorry, did not see your question the first time around... I used velcro, its easy to put on, it holds very well, the plane would come apart before the camera would come off, but I can still very carefully "peel" the unit off if I need to do some work on it, or even if I want to fly the plane without the camera. Got it from Wallmart, 6 feet heavy duty velcro for 5 bucks in the crafts department.

JettPilot
Old 10-06-2006, 11:46 AM
  #58  
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Default RE: the prefect platform for aerial photography

JettPilot,

Good to know, thanks. I think I will use a similar setup, except closer in on the wing. I think I'll build a cradle or housing to hold the camera and attach that with velcro. Then I can use velcro to hold the camera in the cradle.

Thanks,

-Ed
Old 10-10-2006, 01:11 AM
  #59  
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Default RE: the prefect platform for aerial photography


ORIGINAL: A10FLYR

I don't have a prop problem!!!
Nice and cool! That's what I'm looking for a long time!!!

What is the angle between the engine and the fuselage or the wing?
Old 10-10-2006, 08:46 AM
  #60  
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Default RE: the prefect platform for aerial photography

ORIGINAL: forbidden_city

Nice and cool! That's what I'm looking for a long time!!!

What is the angle between the engine and the fuselage or the wing?
0° but I'd bet that the Nitro Models Cessena 337 would be a better plane to convert. Just put the camera on the front instead of a motor.
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Old 10-11-2006, 12:38 AM
  #61  
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Default RE: the prefect platform for aerial photography


ORIGINAL: A10FLYR

0° but I'd bet that the Nitro Models Cessena 337 would be a better plane to convert. Just put the camera on the front instead of a motor.
Thanks! Cessena 337 looks beautiful but it needs a "pusher" propeller? I want to avoid that because it's more expensive and difficult to find.
Old 10-16-2006, 03:17 PM
  #62  
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Default RE: the prefect platform for aerial photography

I apologize about the delay in posting progress on this project.
Just got back in town this morning.
It‘s raining, it figures
I am going to finish the receiver tonight and post picts in the morning.

Now that I have some time this week the flight video needs to be edited so I can post.
Hope to have that done by mid week.

If you are building the lift master to use flaps here are the trim settings:
Rudder .. 1 ½” high and low
ailerons .. 1 ½” low 1 7/8” high (mix 10% rudder recommended on low)
FLAPS .. ½” LOW with elevator ¼” down, 1 ¼” high with elevator 3/8” down.
You may need to make slight adjustments do to deferent equipment and weight in the plane.

Bit of warning here I have made several flights at over 15 min per.
To come up with these settings, they should give you good stable results.

If want a real white knuckle ride.
set your ailerons as flaperons (1” down), use your flaps as spoilers (1” up).
Put the plane in a steep dive, cop the throttle and hit the switch with the above pre set setup. (use the additional wing supports or make the wing into a one piece before you try this)
You will see the plane go from about 65 mph down to 30 mph or so in a very short distance.
Note this is what you will see viewing form the cameras as you make the dive.

Do not try to set the plane up with the settings that are referred to as crow.
This is not a stick or an aerobatic air frame.
It is great for dives or to slow you down when descending but not for landing.
On this large of a wing you will stall and crash if you use this setting to close to the ground.
I broke 2 propellers and an axial on the main gear when I tried to make it work.
The plane works fine with the flaps on low rate for landing.

As a footnote, if I can find them I am thinking of adding a set of air sirens I have laying around for affect on the bomber version that is in construction.
With this big of a plane it adds a hole new meaning to the faze “In coming”.
Enough for now
Cheers





Old 10-19-2006, 04:56 PM
  #63  
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Default RE: the prefect platform for aerial photography

Finally completed and tested the new ground station.
If the rain holds off this weekend I will record a few more videos.
If it storms Ill be edit and posting the video that I have now.
As I had stated in an earlier post, I have been building a universal video receiver.
It is based on the control board sold by http://www.radio-kits.co.uk/
Using 2 law-mate revivers and an antenna divider rated at 2.5 GHz I am able to tune in all of the 900, 1.2 and 2.4 GHz bands from one unit.
Since I can adjust both the frequency and the IF that I want to receive, I can use any transmitter that may be available at any time.
But most importantly I can eliminate about 99% of the background static in the ISM band as well as adjust the gain level of the LNA bank for best received signal.

Below are picts of the finish ground station along with the lift master sporting the finished main wing with flaps and spoilers.

The ground-station consist of:
.. a high brightness 17” TFT
.. integrated 12 power distribution unit with digital read out
(battery power for 5 to 6 hour capacity)

.. The universal receiver
.. high gain patch and ground-plane
.. pole and stand not shown
.. 60 frame per sec dvr
(the two old receivers on the ground-plane are to be removed)

As you can see every thing fits neatly into the mil-spec carrying case
I can have the system setup and working in short order.
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Old 10-25-2006, 02:06 PM
  #64  
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Default RE: the prefect platform for aerial photography

Made a few flights this past Sunday.
Now I remember why you only change one thing at a time when you are trying new equipment.
This was the third flight that day with the lift master and all the video equipment on including the new receiver set up on the ground station viewing it all.

In my haste to get out to the field I neglected to program the pic with correct receiver frequencies of the transmitter. To top it all off I also forgot the antenna for the freq counter so I can set the freq manually.
I was forced to let the receiver auto scan for it and this makes for some choppy video.
The unit will not loose the signal but you can see the interference of the imbedded data.

It gets worse; I forgot to put the set screw back in the front facing camera.
Just before take off I removed the lens cap from the rear camera but forgot to reset the ALT .
A fatal mistake as you can see from the video.
I know it was not valid but continued to fly with it anyway.
Hit the pine tree on an approach to the runway at over 50 MPH.
The front camera was completely destroyed along with my motor mounts and the main gear was striped with a section of the bottom of the fuse.
The right wing panel had a large gash in it.
All in the entire plane faired quite well and will be an easy to fix.
As for the tree, it now has a new 6ft gap cut thru the top of it.
The lift master cut the top of the tree out like a buss-hog in a corn field.
The pane is built like a tank.
http://www.rcuvideos.com/view_video....044041262b3ac7
Old 11-28-2006, 11:46 AM
  #65  
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Default RE: the prefect platform for aerial photography

Sorry to leave anyone following this post hanging.
I Just got back In town this week from the UK.

We made a good test flight with the lift master this morning.
I connect the auto pilot and ran an altitude test at about 800 to 1000ft out at the ccrc field.

It was a bit of an overcast but the rain has held off so fare.
The live video works very well.
I decided to use 2 OSD’s on this plane, one on the flight camera and one on the ground observation camera.
Here are some shots from the observation camera using the dvr on the receiver.
Note; the RPM indicator is not connected.
Waiting on the light sensor from mouser.
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Old 11-28-2006, 03:20 PM
  #66  
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Default RE: the prefect platform for aerial photography

Thanks for the updates Steve ! I have enjoyed following your project, there is some really neat stuff there. One day I might "borrow" some of the things in this thread to improve my UAV's

JettPilot
Old 12-29-2006, 01:26 PM
  #67  
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Default RE: the prefect platform for aerial photography

As I said before I will update this post as time allows.

This past Sunday I tried using two different video receivers at the same time.
One of my own construction and one offered by one of rcu’s advertisers.
As I have tried over 15 different receivers at this point with the same results.
All of them including this one work fine with good video quality up to about 700ft or so.
After that you get brake-ups and video noise ect.
Take your pick of the antennas that any of these guys offer, you can improve range a bit but the brake-ups continue.
The rule of thumb that I use is, usable video 80 to 90 % of the time is the defining point between usable and a toy.
Enough of my rant..

Using a good high gain antenna and a well tuned LNA my receiver will work well out to about 30 miles as tested with a 100mW video transmitter and 3db gain antenna on the plane. It also cost about $3,000 to build, not a bargain by any means. (It is a bit over kill)
I do have to sacrifice video sharpness do to stability circuits on the twin comparators but we fly by what you can see not by how pretty of a snap shot can be made from the video clip.
I can live with a total amount of accumulative brake-ups of less than 30sec. per 1 hour flight.
This project has been about controlling an plane at great distance by the video coming from it down to the ground operator.

Don’t get me wrong I love to fly electric planes and the small cheap import TR/RX units are fine for short close in flights but they just can not carry all the gear like big gas and glow can.
Here is short video from Sunday, hope you like it.
Had to compress from 2 gigs to less than 100 meg to upload so it is low res.
Link 1
http://media.putfile.com/test-flight-3200ft-12-17-06
link 2
http://www.rcuvideos.com/view_video....caf7fe4e97c4d4
Old 01-02-2007, 07:31 PM
  #68  
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Default RE: the prefect platform for aerial photography

I received my Lift Meister last week and so far I am impressed with the plane. Initial inspection revealed no damage in delivery, that the fuselage, wings and tail surfaces are generally built straight with no twists and the covering has practically no wrinkles. It also seems pretty strong and well built. Surprisingly good quality. As Steve has reported, this plane has a lot of room in the fuselage for equipment and is very sturdy. Just to be sure, I beefed up the area behind the firewall with heavy fiberglass cloth and epoxy. I plan on using a 25cc gas engine and adding flaps and mount a full size camcorder on top of the wing with a counterweight. I already have the camcorder, so I wanted to start with that, but may eventually progress to more sophistocated systems including wireless video. This plane is a great deal for $259! It took a while to get here, but was worth the wait.

I'll report back after I finish assembly and begin test flights.

-Ed
Old 01-03-2007, 07:01 PM
  #69  
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Default RE: the prefect platform for aerial photography


ORIGINAL: steve_molmer

As I had stated in an earlier post, I have been building a universal video receiver.
It is based on the control board sold by http://www.radio-kits.co.uk/
Using 2 law-mate revivers and an antenna divider rated at 2.5 GHz I am able to tune in all of the 900, 1.2 and 2.4 GHz bands from one unit.
Since I can adjust both the frequency and the IF that I want to receive, I can use any transmitter that may be available at any time.
But most importantly I can eliminate about 99% of the background static in the ISM band as well as adjust the gain level of the LNA bank for best received signal.

Its good to see you still posting about this project Steve ! You have done so much neat and cutting edge stuff with this plane, from the engine to the electronics, I have been studying every detail. One thing I definately want to build is the Video receiver. It can be single band, 2.4 is fine... My two best transmitters, 5 Watts on 2.4 GHZ came with receivers that are substandard, succeptable to intereference and low sensitivity. (either that, or its just way off frequency ) My better receiver is the Lawmate, the one like you are using, but it will not tune the frequency that my 5 watt transmitters are on [:@]

Most of my flying is using 1 watt transmitters. I am able to fly 5 miles with 1 watt and that standard Lawmate receiver and a 14 dBi patch, 100 % video flying, no automaion, but I would like to go further. Can you post a schematic of how you connected the Control board to the Lawmate receiver ? I dont want to spend a huge amount of money, but what else would you suggest to make the lawmate receiver perform better ?

Thanks,

JettPilot
Old 01-15-2007, 11:27 AM
  #70  
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Default RE: the prefect platform for aerial photography

Flyfast1:
I am glad to hear that you got it.
Is it the new version with the red bottom main wing or the first version with the military green?

When you get a chance post a few picts.

I just got one of the new versions my self a few days ago.
Neal and the guys out at cedar hobbies have real done a nice job on improving a great design.

I see that the fuse of the plane has a lot more reinforcements, and the main wing has really been beefed up.

If you are going to run it as a camera platform you will need to spread out the main gear a bit to about 20” to add better stability on the ground. Not a big deal using a vice and a protractor.


Can’t wait to get it into the air.

I am also building a tricycle version of the lift master with a 41cc gas on the nose end.
Lets just say that it will be caring a large object and leave it at that.
I will post more video and picts soon.
Cheers
Old 01-15-2007, 11:44 AM
  #71  
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Default RE: the prefect platform for aerial photography

Jetpilot:
I apologize about the delay in getting back on line.
I have been on site for work.

Got your email on the transmitter issue.
sounds like the transmitter is slightly off Freq.
You need a freq counter like the one that Mpj products, to do the calibration.
If I remember correctly the unit was only about $150.00 US.
I will find the link to the web site for you shortly.

When you have a freq counter you can roughly tune the transmitter and the receiver to get much longer range and reception.
Lets face it when these guys are make these thing they simply look for video on the screen and try to hear sound on the speaker they never look at the freq or do any real calibration.

Let me know when you get a counter and I will walk you thru the setup.
cheers
[8D]
Old 01-18-2007, 01:34 PM
  #72  
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Default RE: the prefect platform for aerial photography

With the weather here the last few days I’ve been build on the Idea of carrying a very large setup complete with a highress starlight cam along with beacon tracing for night flying. The system will be capable of flights out to about 20 miles and back. To make the plane more visual in the air from the ground I will be adding a lighting system and pdr or IR reflective covering.
As this plane needs to be able to land on some uneven ground I have converted another lift master to do the job with tricycle gear.
Here are some picts of the work so far.

PS. I have one of the new version of the lift master that I am working on also.
I will post pics of it in the days to come.[8D]
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Old 01-18-2007, 02:34 PM
  #73  
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Default RE: the prefect platform for aerial photography

steve_molmer, I just took the time to read this post from page 1, un-frickin believable! Thats all I can say. Well maybe not all...I just about died laughing when I got to the pine tree. I only allowed myself to laugh after the way you said you put a 6' hole through the tree and you took it in stride. Some day I hope to be as talented as you, and I mean it. I will be following this post for what I hope to be a long time...Denny
Old 01-18-2007, 10:46 PM
  #74  
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Default RE: the prefect platform for aerial photography

Hi Steve,

I have the version with the red bottom main wing. I liked it so much, I ordered a second one. I will post some pics when I complete assembly. The fuse looks pretty beefy to me and the main wing seems strong as well. Thanks for the suggestion on the main gear.

-Ed

ORIGINAL: steve_molmer

Flyfast1:
I am glad to hear that you got it.
Is it the new version with the red bottom main wing or the first version with the military green?

When you get a chance post a few picts.

I just got one of the new versions my self a few days ago.
Neal and the guys out at cedar hobbies have real done a nice job on improving a great design.

I see that the fuse of the plane has a lot more reinforcements, and the main wing has really been beefed up.

If you are going to run it as a camera platform you will need to spread out the main gear a bit to about 20” to add better stability on the ground. Not a big deal using a vice and a protractor.


Can’t wait to get it into the air.

I am also building a tricycle version of the lift master with a 41cc gas on the nose end.
Lets just say that it will be caring a large object and leave it at that.
I will post more video and picts soon.
Cheers
Old 01-18-2007, 11:09 PM
  #75  
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Default RE: the prefect platform for aerial photography

flyfast1, so how is my home town of Livermore? I use to live at 911 Venus Way, loved the summer Rodeo's, has 14 great years there!

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