PatMc
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Posts posted by PatMc
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Erfolg, looks like you're model is experiencing "phugoids", there's a good description & explanation in Wiki of the probable cause.
Re your clubmates' reaction to the vertical climbing Saggitas : you could point out that since the wings are not contributing any lift during a vertical climb it's actually less stressful on them than a "gentle" scale like climb. Also that the speed of a vertical climb isn't actually as fast as it might appear to be, a typical 30 sec burst that takes a model to 200mtrs is only 15mph.
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4 hours ago, Basil said:
Yes Martin, a 4 cell holder, it was 5.7v. at the time. ( 4x rechargeable @ 2100mAh )For the last 2-4 yrs I have used this set up with no problems !!!!!!.
Andy, you said 'Not man enough' , please elaborate.
Bas
That's not 5.7v under load, is it ?
What voltage is the battery holding whilst the servo tester is being used/attempting to be used ?
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On 21/02/2024 at 22:16, Hoochykins said:
Would I be overpowering it with a 3S 2200 and the below motor (not running it at full blast):
https://www.overlander.co.uk/rc-motors/bm600-v3-3650-09-1500kv-brushless-inrunner-rc-motor.html
The motor is only as powerful as the supply voltage & load (i.e. the prop) it drives. The limiting factor for any motor is actually the current, which is stated in the spec for this motor as 30A . The power given in the spec must be when using a 4s lipo. If that motor was used on 2s lipo the max power would be 225W but that would be achieved using a larger prop at lower rpm. However the 225W power could easily be reduced simply by choosing a prop to suit the power required.
Advantages are the drop in fit & fact that the motor would be used at below it's max current meaning it would have an easy life.
IMO big disadvantage with this motor is the puny 3.2mm dia shaft. I would want a 5mm shaft in an inrunner of this size - reason being that if the shaft got accidently bent, say in a bad arrival, it would be impossible to change whereas changing a shaft on most outrunners is a simple job.
The model below, Igor, is a "bitsa" I made a while back using a similar fus to the EP & a spare 72" wing. Motor is an Emax BL2815/09 despite it's ragged looks Igor climbed to 200m in 30 secs from launch using a 3s lipo & had a better than expected glide performance. The motor doesn't seem to be available now in the UK but 4Max list an equivalent albeit 1090Kv instead of 920Kv. Also the 4Max motor includes a rear mount + bolt on prop driver as standard however a collet type prop drive is listed in the spares for £3.95.
If you're interested in how I tackled the outrunner motor fitting I can dig out & post some pics.
PS Igor use 3s lipo with 250W power & weighed 950g.
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You may as well get a brushed motor ESC & 2 s lipo as follow this recent advice. It would be cheaper & IMO prove no less unsatisfactory.
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But he's sensible enough to always asks for advice on the choice of any gizmo he hasn't used before or for a long time. 😉
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Somehow, I don't think Erfolg will be fitting retracts to his DB Mascot. 😉
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5 hours ago, Jim Hearnden 1 said:
Danger UXB that are old enough to remember it!
The series was running on Freesat ch 82 - TalkingPicturesTV.co.uk I think tonight's was the last episode but it's all available on their catch up system.
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4 hours ago, J D 8 said:
I think I remember correctly he only got caught because his address was on the drone when fished out of the water.
IIRC it was a fixed wing model that had a camera. Footage from the SD card revealed his car registration before he launched the model & it also showed the location he launched from. The SD card was returned to him & he uploaded it to YT.
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It's ironic that this thread has been posted in a virtual forum, hosted by a magazine who's title has not been matched by it's content for decades. 🤣
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Don't bother messing with the downthrust & definitely don't faff with the wing incidence, you only need to reduce the available power to a suitable level. Just try fitting a lower pitch, smaller dia. prop. You will have to experiment with a few to see what works best. For preference try ones designed for ic.
Some F/F people even used to fit the prop on back to front as a make do temporary field fix.
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28 minutes ago, Martin Harris - Moderator said:
Used Sinclair Microdrives IIRC
That's the one. They came with a built in very basic word processer & spread sheet.
I rescued & repaired a faulty Tonto + dot matrix printer from the store's skip. At the time we had monthly one to one progress reports with the level 2. He was a pretentious PITA who thought he was a whiz with statistics. I always printed of my report together with a graph showing the key performance figures for my team over the month. I was the only manager who made a printed report but he never asked for a copy.
On a poor performance month I printed the graph with Y axis from zero up, on a good month I printed only the top part of the graph but over the same size paper. Result gave relatively flat curve on poor months but nice rising curve on good ones.
He never twigged.
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Anyone remember the BT Merlin's "Tonto" (Rebadged version of ICL's OPD) ?
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5 hours ago, Peter Christy said:
It's simply path-o-logical.
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Erf, 0 - 0 incidence does not equal 0 - 0 AoA.
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17 minutes ago, Paul De Tourtoulon said:
This any good ?.https://sceptreflight.com/Model Engine Tests/OS Max-III 35.html
Nah ! the one Robin gave yesterday is better.
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2 hours ago, toto said:
Just as it says on the tin ......... what constitutes a " Park Flyer " ?
"Park Flyer" is a title not a description.
Without a definition of "Park" it's impossible know what it means.
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If you have a toaster you can put the cheese in place on the toast & melt it in a microwave. 👍
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2 hours ago, toto said:
...It's unfortunate that I am now experiencing an issue with my NX8 .... bought new not even a year ago. I will be having a look at that later today to see if I really need to send it back to the manufacturer for attention or whether a firmware update may resolve. .... as a sideline ...... I still find it very coincidental that its starts playing up just as I recalibrate one of three issue ridden Overlander ECS's but it could be entirely unrelated. I have around three 100amp Spektrum Avian ESC's I could try but refuse to stick a £100.00 plus ESC in a model like a basic Domino ...... not happening.
Toto, I probably used the wrong phrase in saying "re-calibrating the Tx", the procedure was actually the Tx being operated through it's full range in the normal way with th ESC "learning" & committing this range to it's memory - i.e. the only software change is within the ESC.
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18 minutes ago, Andy Stephenson said:
Is it actually possible to buy just a plan from RCM&E or do you have to order a back issue. In other words, is there a plans service like there used to be.
Looking on the RCM&E main website under plans, there doesn't seem any way to actually make a purchase. Looking into any particular design shown there, it takes you into an article about it then at the bottom an invitation to subscribe but no "buy Button"
AFAIK most plans are available from Sarikhobbies.com but it's cheaper to buy the relevant back issue.
The electric Chilli Breeze is listed @ £15.30.
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4 hours ago, Peter Miller said:
In Heaven there are great clubs with wide open grass field and the wind is never too strong and the temperature is perfect all year round and it only rains at night. No one has cause to complain or moan. Stop the world, I want to get off.
Be carefull in what you wish for ☠️ !!!
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42 minutes ago, toto said:
Hi PatMc
I did not realise that had to be done ....... so the short answer ...... no.
and the ramifications of that could be .......
toto
The ESC motor control would not necessarily respond correctly to the full throttle stick range.
I've never used an Overlander ESC but if it's a re-badged Hobbywing the calibration instructions (May be titled something like "throttle range settings) are simple, clear & take just a few seconds.
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Toto, did you re-calibrate the Tx when you changed the ESC on the Domino ?
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8 hours ago, leccyflyer said:
That Veron Robot is affa bonny Pat. 😎
Thanks Leccy. It's actually a surprisingly good little aerobatic model that I am delighted with, although I only bought the Robot kit because I wanted the unrun NIB DC Sabre that went with it. The Sabre remains unrun but the Robot has been powered by 4 or 5 different diesel & glow before being electrocuted
There's quite along story behind it with all the modifications to the original design as well as the power changes but it wouldn't be fair to hijack this thread any further.
New to forum not new to flying
in Why Not Say Hello....
Posted
Welcome back @DavyW22, I'm a long time Blyth club member (actually since the club was formed). I haven't been active for about the last 3 years or so but hopefully I will be flying again in the next few months.
Here's a link to the BVRMC website you might find helpful in making contact or the next club night meeting is 7pm Thursday next week if you want to say hello.
Look forward to seeing you soon, Pat.