Hi Ricky,
In my oppinion it makes no sense to adopt more than the Q-frame frame parameters.
Since Henry Wurzburg has been keeping the WIKI up to date, I no longer think that using the original MFE Fighter parameter are a good point to start.
It is better to familiarize yourself with the wiki: QuadPlanes — Plane documentation
Rolf
Hey Rolf
Sorry not familiar with Henry and what he is keeping up to date. But I do agree that the original config isn’t the way to go. I had a look today and it’s a bit old. It’s better then nothing, but rather use the most current. I have read the wiki, but just thought if I could find a current param set it would help close the distance I need to travel with all the config work.
cheers
Read up on the best and if you have questions, just ask.
There is a saying here that means: there are no stupid questions, only stupid answers 
Cheers
hahah thanks Rolf.
Hopefully in the next couple weeks the wiring will be done and I can get to testing and config. So lot os questions will be coming …stupid or otherwise hahaha
Hi Ricky,
Have you thought about the airfoil and the desired specification (e.g. slow airplane with high load capacity versus low drag airfoil for high range and speed ) ?
Cheers
Hey Rolf.
My goal is slow and high load. Thats my thinking.
That said a fellow I know who is an aircraft designer did give me the airfoils that went into the design. I freely admit that I am not a plane designer, so I am lost a bit when it comes to how the wing should be, but since its 3d printed, making changes in the future isn’t to hard. A bit of work but it’s doable.
This is where I am today. I am waiting on the servos, as I discovered some information on the servo used in the fighter and that it wouldn’t fit in the wing, so I tweaked the design and ordered the servos. But they have not arrived as yet. I have the FC wired for most things, Power, current and voltage sense, GPS and so on. What’s left is the motors and ailerons.
Also have the booms ready to be mounted…but again need the servos.
Also I need a receiver, which I will get from SIYI in the new year.
Hey can you tell me where the flight controller is on the fighter. I have yet to find information on where it’s mounted.
You then have a suitable profile. Sorry for the demand.
Impressive how far the construction has already progressed. A really great project.
At the end of the load cabin, on the “roof” of the parachute compartment.
Hey Rolf.
Didn’t see anything in your comment as a demand, rather and interest and curiosity. I am pleased to get them.
Yes it has come together fairly quickly, I think even faster if I wanted to start printing from scratch today. Lots of reprints as I tuned the design, this caused a lot of delays. But ya fairly quick.
Your saying the FC is at the end of the load cabin on the roof, I wasn’t aware there was a parachute compartment so no idea where this is. However I get the impression from the attached video that the Parachute is mounted on the bottom and the FC is under this panel. So I updated the design to take the FC location into account. I don’t like where I have it now and on the next build it will be where this is roughly anyway.
Fighter FC Location
Interesting this vide shows the parachute location is on the underside.
Now you have caught the compartment for a GPS/compass. The FC is further ahead. I have just no better picture at hand and marked the spots:
Edit: more clear photo:
Cheers
Oh i see.
Hmmm. So i have created to much space for the gps to go into if i use it there instead of the fc. I will have a look at the fc location you referenced. Interestingly thats where i have the gps at the moment. Ok when i get home i have some tweaks to make. But its all good thanks for the information.
Thanks again for these photos they are really helpful
I updated the next version to include the GPS and FC mounting.
I have not done a parachute bay as yet, because I don’t know enough about the size of the chute folded up. I imagine with some reading I will find that.
Can I ask what size lift motor and props are those.
Oh and I love the shop.
I opted for a complete T-motor set (motor,ESC,prop): Fighter VTOL 4+1 fixed wing - #491 by Rolf.
Best you scan through the above thread. There are many helpful posts and links, especially from GregCovey, god rest his soul.
Why do you want to rebuild a parachute bay ? I think it exists because the Fighter was also advertised as a 2-mot with the option to land it regularly by parachute.
As a safety feature, that would be different, of course.
Rolf
Why the comment about Greg. Did something happen to him.
As for the parachute bay, since this is my own build and design I didn’t include the parachute…just wondering if I want to. Good safety item.
Edit:
Just did some reading about parachutes. They take up a ton of space and weigh more then I expected.
Additional Edit
I just read the link about Greg, Super sad news. I had chatted with him a few times. Super guy.
He will be missed.
Thank you for the link
Hey Rolf
Happy new year. Just finished wiring my wings. They come in at 1740grams. So close to yours. I still need to add the aileron linkage and servo cover. But thats only a few more grams so pretty close to yours. Thats also the wing with the Pitot so that adds a bit. So happy happy. I think the body is coming in heavier however. I have not properly weighed it as yet.
Cheers
Hey Rolf
So I finally got the total machine weighed.
The fuselage is 2691 grams or 2.7 KG…compared to 2.25 kg for the original Fighter.
The wings are 1.74 kg versus the 1.77kg of the Fighter.
That said, I am missing the receiver for the main body so a bit more weight there.
As well as no propeller so a little more there.
The wings need the aileron linkage and propellers…so a few more grams there but other then that they are done.
So right now it’s coming in around 6.2KG versus the 5.79KG of the original fighter so around a 400 gram difference.
I will see if there is anything I can do on the design to further reduce the weight, but I confess I am pleasantly surprised it’s come in so close.
Cheers
Congratulations Rick. The low weight of the wings with 3D printing is impressive - the quad motors and quad mounts are already weighed in there ?
Rolf
Hey Rolf
Yes thats the wing weight with the motors, arms folding mech and everything needed but the propellers and servo linkage. I went back over the drawings today looking for areas I can further reduce weight. But starting to run out of ideas. The difference between your model and mine is that mine is about 6.4% heavier right now. I imagine that will go to 7% with the last couple items. So shaving it down a bit more might be possible. Just need to think on it.
I am going to look at different printing filaments as well. Also if there are any settings I can use to reduce the weight just through printing of the parts themselves.
But at this point I need to get the last of the wiring done and see if she spins up.
Hi Rick,
the ribbon comes from key chains. At e.g. amazon just search for “Remove Before Flight Red/White Key Chain”.
Rolf
cool
I ordered some from Amazon last night. Will get a straw and so heat shrink tubing and make up a cover.
I didn’t know you can get them from Amazon.
Thanks very much.
