Introducing the Albatross UAV project

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Hello all,

Where to start... Well, My name is Justin, and aviation is my life. I grew up in a family with aviation in our heart and blood. Everyone in my family has been in some sort of aviation, whether it is Full scale helis, prop jobs, jets/airliners, hang gliders, or even home built aircraft. I solo'd at 18 yrs old with only 9 instructor hours, and continue to enjoy every aspect of aviation. I am currently serving in the USAF as an aircraft electrician, in order to finish my Aerospace engineering degree. (Which is not far from being complete!)

Onto the project! 

The albatross UAV project came to me one night while laying in bed (so original isn't it?!). My goal was to provide a high grade, inexpensive UAV platform with unrivaled performance.

My goals?

A standard 4-6kg+ MTOW

Plenty of room for sensors, batteries, and equipment

Easy 1 hour flight times, and up to 4 hours (which is the goal... of course we can't be sure to initial flight tests)

Breakdown, and transportation ease!

Wide flight envelope

Sexy and appealing looks

Last but certainly not least, EFFICIENCY!

Airframe introduction.

The wing: The wing will have a wingspan of 3000mm, and wing area of 68.38dm^2 (in other words, 118" span, and 1060in^2). It consist of an optimized foil, and a forward swept planform. The foil is designed to ensure low stall speed, while maintaining a high max efficiency, and large cruise window. The wing planform Utilizes this foil nicely. It is a relatively high aspect wing with a ratio of 13.2. I have found that this moderate aspect ratio is preferred at RC Reynolds numbers for numerous reasons. an Aspect ratio of 12-15 allows for easier, and stronger wing structure, it allows for slightly higher Reynolds numbers, allowing airfoil's to work properly, over a wider speed range, and allows for easier built in retract, and or component bays. Obviously, we want to achieve all of the above, with minimal impact on performance. Of course a Higher AR wing would be more efficient, but at a significant cost (both in actual price, and giving up benefits.) The wing will be built with built in component bays, allowing for RC rx install in one wing, and Vtx install in the other. Not only does this allow for more room in the aircraft, but it allows for proper separation between Vtx and RC rx. The wing is forward swept, which helps minimize the chance of tip stalling while on approach with your UAV, which may as we all know, be overloaded. (there is nothing as horrible as losing your beloved UAV platform and equipment!). The downturned style tips aren't just for sex appeal, they actually reduce drag and tip vorticites, as well as decrease stall, while improving stability!

The Fuselage: The fuselage is designed around the user. It is designed to have plenty of usable storage space. Whats this mean? Well why would you have a tall narrow fuse? This not only makes is a huge PITA to work in, yet it limits how YOU want to lay out your components! The fuselage is approximately 740mm long, 150mm deep and 200mm wide. To avoid excessive fuselage/wing intersection drag and interference the fuselage is built in a slight trapezoidal shape, only to an extent that wouldn't hinder storage capacity to much. This translates into a fuselage with more usable space than the popular SkyHunter. I haven't mentioned efficiency yet. Lets not forget about that! The fuselage is actually a very efficient shape, minimizing the drag left behind. (even though it will only get chewed up by a prop...). It is also efficient in cooling. It will be designed with a NACA duct in the nose, which is a high pressure region. It will consist of an exhaust right above the motor, which is the lowest pressure region. think suck and blow. While creating a pressure differential it actually pulls air through the airframe keeping necessary components nice and cool.

Tail/s: The tail is an Inverted V design. Why? Simple really, an Inverted V improves efficiency while decreasing drag. It is also naturally more stable in a banked, and coordinated turn. The Inverted V allows for twin tail boom design, allowing for a large diameter prop. It also raises the ground clearance of the tail on landing and takeoff.

Breakdown and transportation: The number 1 reason for keeping airframes small is due to transportation and storage. The Albatross is designed to fit into a box no larger than .35m X .5m X 1m. In reality the case could be much smaller. How does it do this? The fuselage is 740mm X 200mm X 150mm, needless to say, it was designed within the required specifications. The wing is 3m long! However, it simply breaks into 3 1m long sections. The twin carbon-fiber tailbooms are 700mm each. The tail will be hinged at the center, and consist of two 440mm halves, allowing it to fold into one 440mm piece. Not only does this make it easy for the end user, but it reduce's shipping costs to your door. No more paying as much as 50% of your aircraft on shipping alone!

Goals:

My Short Term goal is to finish analysis and development. I am planning on starting a kickstarter to fund the initial molds and production costs. The current Design consists of a fiberglass fuselage, twin carbon fiber booms, and either a foam core/obeche covered wing, or an all built up wood wing. It will come with optional fuselage formers/inserts. These will be laser cut, allowing the builder the option of using them or not. These peices will consist of a retract mount (offset similar to an A-10c aircraft nose wheel, to allow for minimal effect on usable space) as well as numerous mounts and shalves for components and or batteries. Of course, as mentioned this will be up to the customer whether or not he/she will choose to install them. It also allows for some open source design in case anyone wants to improved upon, or create their own after market laser cut parts. This airframe would be available at a goal price of around $500 usd. This may or may not be achieved, but it is my GOAL. I consider this a reasonable goal considering similar aircraft such as Hobbykings UAV-3000 are capable of being produced around $300. I hope that my few added features are not enough to out-reach my goal.

Specs:

Albatross:
Wingspan; 3000mm
Wing Area; 68.38 dm^2
Root Chord; 300mm
Tip Chord; 160mm
Fuse Length; 740mm
Fuse (max) Width; 190mm

My Long Term Goal is a Albatross Pro version. The Albatross Pro will have a slightly enlarged fuselage,  more wing area, higher MTOW, change in airfoil, fully molded wings and tail, and more precise construction. These changes would increase MTOW, and cruise speed/efficiency to a more specified range. It would also consist of a few ease of operation features such as built in Cannon-plug style connections for easy quick-disconnect assembly. This means that when you take off the wing, there is no servo connection to fumble with. It would also consist of some ease of assembly mods such as quick disconnect wings, booms, and tail, requiring no tools to use. (Think, Crutch/cane style push button. This would be located under the flaps.)

Specs:

Albatross Pro:
Wingspan; 3000mm
Wing Area; 75.216 dm^2
Root Chord; 330mm
Tip Chord; 185mm
Fuse Length; 890mm
Fuse (max) Width; 230mm

Here is a more in-depth design log on my RCG account. The wing planform, and laminar foil research was originally from a previous project, before I realized its potential in FPV/UAV. Although the introduction of my UAV/FPV platform is fairly new, a lot (many years worth) of prior personally research has been incorporated.

I am currently in communication with a few different OEM manufacturers for an initial Hobby version, and a long term Pro Version. If you know of, or you are another OEM manufacturer feel free to contact me! It would be much appreciated!

Please, feel free to comment, discuss, and provide constructive criticism! After all, this is my first post on DIY Drones, so please be nice!

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Comments

  • 3692912447?profile=original3692912085?profile=original3692912466?profile=original3692912376?profile=original

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    So, I figured you guys might appreciate some pictures! Andrew R has been hard at work adding his professional touches to the project!

    There is still much to get done, however I plane on starting the Kickstarter sometime this month. As mentioned, I am going with the $5k prototype. It is a bit more of a risk and a bit harder to fund with kickstarter, however backers should keep in mind that the $5k prototype directly comes off the top of the "total price" (or big picture), where as the $1,600 prototype adds to the total price. It also provides a much mroe realistic test platform to properly test loads, and accurate testing of a production model.

  • "truely" (I typo-d "grisly")
  • Thanks Godwin!

    In the mean time I have made some timeline changes.... I have decided to NOT go with the foam prototype. I will be campaigning to fund a $5,000 prototype of the same honeycomb composite build. The difference in funding is that this $5k prototype directly comes off the "total" price for initial production. Any moulds which do not have to be changed, can be used for production, whereas the foam prototype is "in addition to." So although a foam prototype seems cheaper, the composite grisly is cheaper in the long run.

    Ontop of the "big picture," the composite will more accurately represent build technique, structural and stress testings, payload and performance testing, etc. All around simply more accurate than the proposed foam idea.
  • Great Project.. will def follow it :)

  • I have a preliminary kickstarter ready for peer review. I would like to send the link to a few people via PM to get their take on it, as well as any suggestions they may have.

    I have decided to go with a 3 Phase development. Create a Kickstarter for the prototype (true cost is around $1600, with a campaign for $900). After a succesfull prototype, I will make any necessary changes to the design/airframe and proceed with a 2nd kickstarter. This one will be for actual production and mold purchases. 3rd Phase is using income from the Hobby version of the Albtross and investing in the Pro version.

    Thanks guys!

  • PS, if you are browsing DIY via your mobile device or table, you are still able to click the link above. While I was putting the site together, I also created a mobile page. The mobile is just as easy to navigate.

    Both site will remain transparent and easy to navigate even when I actually have products to add ;)

  • Thanks Bak! 

    You as well, I hope your Christmas is filled with joy and good family.

  •  

         Good stuff Justin, congradulations. Like the company name to, it suits. Roll on the 1st.

     Merry Christmas & a successfull new year to you & yours Justin.... well & everybody else as well !!

     

      Regards....Bak

  • Well. The website is up and running!

    There are no products to be listed, as of yet, however there is some general information about the project and the product.

    I am still plugging away at the solidworks model. 

    I have had many suggestions to follow This guys example, and start a kick starter hoping to fund the prototype. I will only set a goal of half of what it will really cost me, however if it exceed the full price of prototyping, all extra funds will be added to the "next" kickstarter for the production phase. Still waiting on business approval from Amazon (required for Kickstarter accounts) and I am going to wait till after the holidays, I think the 1st would be a good day to start it!

    Without Further Adieu,

    www.Martin-Dynamics.com

  • Well guys, I apologize for the lack of "exciting" news...

    Solidworks has been kicking my butt. Lots of changes from what I was used to. Fuselage and wing are done, and accurate. Having trouble figuring out a good method to accurately model the boom mounts, as well as small stuff like the wing internals/spars/wing to wing interface, etc...

    I will however continue to keep you all up to date with whatever information I DO have.
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