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May 27, 2019, 13:03:36 PM

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Author Topic: Speedo  (Read 18873 times)

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Offline Seanick

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Re: Speedo
« Reply #80 on: April 26, 2014, 13:32:17 PM »
Just about off to the slope now, nicad fully charged,  speedo in van!

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Offline tilmanb

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Re: Speedo
« Reply #81 on: April 26, 2014, 13:47:00 PM »
The "problem" with the speedo is that it is (not surprisingly) insanely fast.
Too fast for a beginner. You got to have your whits together when you fly it first.
Because as with any plane, flying it slow is where you need to know how it behaves. Slowly get a feeling how much you can slow it down and how it behaves.
You will find that behaves very nicely slow. And that you can throw it around in very inefficient turns in bad lift and it will not fall out of the sky.

But, and that is what made me crash my first speedo, you got to work yourself down to that kind of speed. If you let it go and do it's thing it will be fast.
At that time faster than anything I had ever flown. Which really drains your brain.
I freaked out and lawn darted it. (Repairable wing breakup)

This will not be a problem for any experienced flyer!
But anyone who has never flown anything else than perhaps only foam trainers should better bring some extra tight pants for the first flight.
Once your thinking pattern get used to the speed you will find it's a lovely plane with no real bad tendencies.
But it has it's name for a reason!

Beginners plane? Not really, but once you can stay ahead of a potentially really fast flying plane you can handle it. Because if you bleed off some speed you will find that it becomes surprisingly floaty.
Personally, I can't wait to get my new speedo going. The last one got sacrificed for a learning experience about bad batteries. :(

Offline Seanick

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Re: Speedo
« Reply #82 on: April 27, 2014, 21:23:02 PM »
After a day of balsa bashing, I put more scarphs into the wing than in M&S. Rebuild the wing root, two ribs, D box sheeting and the leading edge. Added one doubler rib inside the last one, only because the last ply rib us severed by the wing bolts. Applied an inch of glass cloth and epoxy to the wing root.
Glued the fuselage back together with cyano,  the epoxied inside with some short lengths of carbon tows. Then on the wing seat laid cabor tows across the join, then longitudinaly along the aperture, with a final layer of glass on top.
Finally recovered the repaired section of wing with orange Solartex,  as Solarfilm seemed very stretchy compared to the Speedo s own covering.

Finally hoon it up to the slope to be met by 2 knots of wind and no lift.

Did a few test glides, and it was fine. I can see it's going to be a lovely little plane, just need to wait for the right day.
So I launched it once more, it went off the slope, did one circuit and managed a greaser if an up hill landing, with a last second hop over a cow pat.

Happy to bring it home in one piece for the first time!!

The rubber bands are to go with the retro Solartex!!  I just couldn't bear to fix it again!
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Offline slopeflyer

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Re: Speedo
« Reply #83 on: April 28, 2014, 10:36:02 AM »
Nice job there Nick. Those speedo wings are tricky to repair, one thing though, what about the union colour scheme? ;)

Offline Seanick

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Re: Speedo
« Reply #84 on: May 02, 2014, 20:07:33 PM »
Right.
Battery charged and cycled.
Tx charged
9 knots on slope, smooth lift.
Left work early.

Off it goes, yup, this is ok, flys okay, bit of down trim, bit of left trim,keep it moving, yup this is fine. Uh oh, lost binding, Ok, it's back now. Better bring it in....uh oh, it's going straight down from 150 feet.
fxxk.

I go down the slope to met with this. It takes both hands and a good pull to get it out as it's in 5".
ila_renderedila_rendered
Amazingly there is no damage, apart from the wire that holds the canopy on.
The rubber bands have worked well.
ila_rendered
Check rx. No flashes.

Turn tx of, then on, no flashes. Gather up bits and go back up slope.

Mmmm, do a range check. Within five paces its lost, maximum 10 paces at different angles.

I have used this Spektrum rx in other planes no problems.

Conclusion.
If I had done a range test first time around I would have realised the carbon canopy was shielding the signal.

If I had done a range test third time around, with the rx under the wing seat I would have realised that the new reinforced carbon wing seat was also messing up the reception.
That's even with one aerial sticking out as on this pic:
ila_rendered


I am going to make a polyester /glass canopy and move the rx back under the canopy. Also get a decent rx like a Orange 620 with a long aerial.

Got to see the funny side  :D

Note where the wing tip is in this pic!!
« Last Edit: May 02, 2014, 20:10:54 PM by Seanick »
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Offline slopeflyer

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Speedo
« Reply #85 on: May 02, 2014, 21:49:43 PM »
Nick, you are a Speedo Basher, give that poor model a break! (Pun intended)

Offline Seanick

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Re: Speedo
« Reply #86 on: May 02, 2014, 21:52:32 PM »
Not sure if 'give it a break' is the right phrase!! :-D

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Re: Speedo
« Reply #87 on: May 10, 2014, 21:46:14 PM »
First glass (non-carbon) canopy about to pop out of the mould....
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Offline Rob Thomson

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Re: Speedo
« Reply #88 on: May 10, 2014, 22:08:56 PM »
I am rather confused why you are having an issue with radio link.

I have NEVER had a fade out on the speedo!

Where is your RX?   I normally put them under the wing.

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Offline Seanick

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Re: Speedo
« Reply #89 on: May 10, 2014, 22:45:18 PM »
http://www.rcmf.co.uk/4um/index.php/topic,100426.0.html

When I get my tx back from HH,  maybe I will have an answer!
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Offline Rob Thomson

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Re: Speedo
« Reply #90 on: May 10, 2014, 22:45:46 PM »
Indeed!

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Offline slopeflyer

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Re: Speedo
« Reply #91 on: May 12, 2014, 10:45:01 AM »
What i learned today was if you use laminating film as a release film when you sock a speedo fuze, make sure you apply it shiny side down! If you apply it sticky side down, it sticks! Dang, first time thats happened, doh.

Offline tilmanb

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Re: Speedo
« Reply #92 on: May 12, 2014, 10:51:41 AM »
I'm surprised you used laminating film at all. Is that even flexible enough for complex shapes like a fuselage?

PS: I suppose you have seen the thread on RCGroups about carbon socking a speedo fuze? I really wanted to try that one day, looks utterly bullet proof.

Offline slopeflyer

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Re: Speedo
« Reply #93 on: May 12, 2014, 14:02:44 PM »
Tillman I only ever sock the centre part. This is the weak point from my experience. See pic.

Offline Rob Thomson

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Re: Speedo
« Reply #94 on: May 12, 2014, 15:02:00 PM »
Have to say...  I have never broken the speedo body in that location

Most I have done is to split the nose by lawn darting it!

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Offline slopeflyer

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Re: Speedo
« Reply #95 on: May 12, 2014, 15:19:41 PM »
I have never broken it either, but it cracks. The speedo is a tough model. I also added some carbon tows on the tail on the 'underside'. It has broken there too.
Anyway, should be finished later today. Wings done, glassing done, just got to attach the elevator servo and fix on the stab. Nice easy build this one ;)

Offline tilmanb

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Re: Speedo
« Reply #96 on: May 12, 2014, 15:34:44 PM »
btw. I'm going into wing bagging soon. My second project will be replacement wings for the speedo.
A friend of mine is currently designing a wing profile.

On my wishlist are:
Full carbon
Kevlar hinge
Aerobatic wing profile that works well with snap flaps
Perhaps 10cm more wing span

I should have prototypes for Wales. Hopefully.

Would anyone else have some wish list ideas?

Offline Seanick

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Re: Speedo
« Reply #97 on: May 12, 2014, 16:16:35 PM »
My Dx7s us back from HH. Here is what they said...

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Offline Seanick

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Re: Speedo
« Reply #98 on: May 12, 2014, 16:17:02 PM »


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Offline slopeflyer

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Re: Speedo
« Reply #99 on: May 12, 2014, 16:33:20 PM »
Pilot error then Nick..

Offline Seanick

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Re: Speedo
« Reply #100 on: May 12, 2014, 16:38:50 PM »
Any more cheek from you and I'll have my wings back!!

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Re: Speedo
« Reply #101 on: May 12, 2014, 16:43:44 PM »
Seriously though, seeing as I spent 4 hours flying the mini gulp thing yesterday,  which has a smaller thinner wing, no tail, and is lighter than the speedo, and with a non computer tx with no rates in 20/30 knots, I am now sure it's not pilot error thank you. :@

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Offline slopeflyer

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Re: Speedo
« Reply #102 on: May 12, 2014, 17:50:16 PM »
Nick, its still pilot error. Whether you dumb thumbed the sticks or installed the radio wrong. Pilot Error!

Offline Seanick

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Re: Speedo
« Reply #103 on: May 12, 2014, 17:53:29 PM »
As HH wrote, make sure there is no metal or carbon around the rx.

Also remember I had poor range check when the rx was OUT OF THE FUSELAGE!!

How will you guarantee a signal in your wrapped Speedo II?
« Last Edit: May 12, 2014, 17:55:33 PM by Seanick »
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Offline slopeflyer

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Re: Speedo
« Reply #104 on: May 12, 2014, 18:05:15 PM »
I will stick the whiskers out of the fuze. Radio failure is very very rare. Pilot error also includes installing the radio wrong and not charging the battery. Consider it a lesson learned, we have all done it!

Offline Rob Thomson

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Re: Speedo
« Reply #105 on: May 12, 2014, 18:08:19 PM »
Maybe to problem is something called DSM2

:)

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Offline tilmanb

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Re: Speedo
« Reply #106 on: May 12, 2014, 18:14:53 PM »
ACK. My speedo ended on a cliff, because of old battery. Pilot error.

Written on my mobile. Please excuse my brevity.


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Re: Speedo
« Reply #107 on: May 12, 2014, 18:21:52 PM »
ACK. My speedo ended on a cliff, because of old battery. Pilot error.

Written on my mobile. Please excuse my brevity.

Actually...

New battery.  But if I recall fast charged for first flight!

Or was that the Fish?

Rob

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Offline Seanick

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Re: Speedo
« Reply #108 on: May 12, 2014, 18:27:53 PM »
I had one whisker out the fuse,  as per pic on this thread, the other inside.
The 'charged a week ago NMHi' was with anether model  ::)
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Offline Rob Thomson

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Re: Speedo
« Reply #109 on: May 12, 2014, 18:30:18 PM »
You know...  The more you explain that it is not technical...  The more likely it was to be just bad stick input!  :):)

Seriously... My money on it being DSM2.  Always caused me problems - that's why I moved to frsky!

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Re: Speedo
« Reply #110 on: May 12, 2014, 18:33:06 PM »
Ok. Pilot error. Failed to range check when putting tried and tested rx into a new model with a tried and tested tx. How about that?

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Offline tilmanb

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Re: Speedo
« Reply #111 on: May 12, 2014, 18:35:44 PM »
Actually...

New battery.  But if I recall fast charged for first flight!
A mistake I will not repeat

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Re: Speedo
« Reply #112 on: May 12, 2014, 22:32:32 PM »
I have done some fresh range checks in the dusk this eve.
Results here...
http://www.rcmf.co.uk/4um/index.php/topic,100426.msg1178999/topicseen.html#new
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Re: Speedo
« Reply #113 on: May 20, 2014, 22:11:33 PM »
Gave mine a chuck today, wind was 25mph and 45 degrees off slope, pretty hairy conditions fir s mauden but after some down trim was added, the 360g speedo handled it. My last was was 340g, quite a noticeable difference in how it flew, certainly more inertia.

Offline slopeflyer

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Re: Speedo
« Reply #114 on: May 20, 2014, 22:12:59 PM »
Pic.

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Re: Speedo
« Reply #115 on: May 20, 2014, 22:15:01 PM »
25 mph!! Flat calm here all day. So calm flew my indoor Shocky over the marina this eve.
Glad to here the new Speedo goes well.

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Re: Speedo
« Reply #116 on: May 20, 2014, 22:20:05 PM »

25 mph!! Flat calm here all day. So calm flew my indoor Shocky over the marina this eve.
Glad to here the new Speedo goes well.

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Speedos always go well. Only really had a quick 10mins, conditions were pretty terrible, very bumpy, just enough to know she rips.
Shocky over the marina? I hope you didn't get stuck in the rigging.

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Re: Speedo
« Reply #117 on: May 20, 2014, 22:25:15 PM »
10 minutes? That's a full session!
Yes, it's fun flying around the masts. Even managed a bit of knife edge, or did I lose the link for a few seconds???  :D
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Speedo
« Reply #118 on: May 20, 2014, 22:46:06 PM »
Haha, now nick doing knife edge round masts that I'd like to see :) PS my lunak has a new joiner, I junked the cracked carbon rod for a 1lb steel bar. Looking forward to the next blow on the north coast :)

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Re: Speedo
« Reply #119 on: May 22, 2014, 20:07:40 PM »
My poor speedos wing after I fell on it. It looks like the covering(which incidentally was excellent was actually the only thing holding it together. Tried one of my old speedo wings, but it seems the joiner is shorter so won't fit in.


 

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