Mosquito trimming session.
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- เผยแพร่เมื่อ 13 ก.ย. 2024
- With near perfect weather conditions this evening, myself and my good friend Ivan Taylor went for a trimming session with the Mosquito.
Wind speeds were around 3-4mph, zero turbulence and wonderful, warm summer sunshine!
We started off with 200 turns for the early flights to check settings were near. The Mosquito had 10g of lead in the nose to push the c of g further forward. The model was turning to the left and dropping the wing tip, so weight was added to the starboard wing. The first flights on video were done on 250 turns.
This helped to tame the left turn, so the nose weight was reduced in small amounts. As we reduced the weight, we also changed side thrust to continue taming the left turn. Next, we upped the turns to 300 to see if the climb would improve.
Each adjustment was seeing improvements in the flight, and by the end of the trimming session, we arrived at 0 nose weight in the model, but we found that the Mosquito just wasn’t recovering out of the turn. To rectify this we need to adjust the decalage again, which means adding nose weight back in to combat the nose pitching up.
The noise you hear towards the end of the flight was the motor coming of the prop hook! Amazingly no damage done, so we called it a day and I went home with a smile on my face!
I can’t thank Ivan enough for all the help, guidance and advice he’s given me. You sir, are a legend and I’m looking forward to even more flying together!
What a pretty, pretty Mosquito! I'm sure it'll be successfully de-snagged and flying beautifully! Well done 😃
@@purcellrcaviationchannel Thank you! We are moving ever closer towards the Mosquito being trimmed now. Just got to wait for some nice and calm weather to continue the process. 👍🏻
@@freeflightscale The lack of nice, calm weather being the fly in the ointment, of course! Has there been a windier year?
@@purcellrcaviationchannel yes it has been particularly windy this year, but we have been making the most of what we have had.
We have lost out on a few trimming sessions due to damage to the Mosquito that required repairs, as well as other commitments.
Looking forward to seeing a full flight with this
@@rc-fannl7364 that makes 2 of us then 😂 Hoping the weather is kind and wind speeds drop to allow us to continue trimming the Mosquito.
Hi, it's very interesting to watch the video. We seem to have made only a little progress during this session. I'm trying to find out how little decalage we can use, we now have to replace the nose weight and increase the longitudinal dihedral. This will probably open the turn as well as slowing the plane, it's obviously under elevated. It's a very precious model for Mark being his first scale job and we don't want any unnecessary damage again, so slow progress is fine. No turbulence encountered which is nice but we will need a different flying site when we get some serious turns on those motors.
@@ivantaylor8965 whilst the progress was probably small, it was great to learn and see what each adjustment did. We couldn’t have asked for better weather to trim though than we got yesterday mate.
Hi, having watched the video again, the turn is to tight and it's longitudinal dihedral to small, it's not dropping the inner wing, that's all. I was afraid of interfering with those trees if we opened up the turn. We need more space.
It's just great to have these videos to see reality instead of relying on memories, for me anyway. Let's hope it's not to windy at Lodge this coming Sunday, so we can continue with Mark's Mosquito.
Excellent repair work after your initial mishap and you've found the mythical tall grass or is that Heather?
On your trimming progress it still keeps the left wing down in the turn. I tend to take a ballsy approach plus I'm impatient. I'd steam washin to that left wing tip. In the field you can use the exhaust pipe of your vehicle provided it's a petrol ICE. Keep your head well back from the exhaust though for obvious reasons. Keep em flying.
If I used that technique I would put washout in the starboard wing which would have the same result. Wash in at the tip is risking tip stall. Steam induced warps can be useful during a contest but ideally
the panel would need to be dealt with in the workplace and strapped down and then left for a week or so if a permanent change is needed. Mark has built a very strait model with a small amount of equal washout in each wing. and I don't want to risk a warp that will be speed related and do different things during the flight. Hopefully we can cure the issue in others ways. Thanks for your interesting comment.
@@ivantaylor8965 Will wait with interest to see how she trims out.
@@DLLReid Thank you for the comment. The area we trim our models is covered in heather, so it gives a lovely cushion when the model comes in. We were just unfortunate when the model took to the path for its chosen landing ground. If I’d been around 1 metre further in the heather, the Mosquito would’ve landed in the safety net of the heather.
After I had repaired the model, I had neglected to pay attention to the alignment of the area I had repaired. This resulted in a significant misalignment on the wing, so it it required further surgery to correct my mistake. Whilst it was frustrating at the time, all that was forgotten last night when the Mossie took to the air again!
wow!!!
@@collinmccallum thanks!
You might want to consider a gurney flap on the left wing. A little concerned that as you increase power she’ll do a death spiral
@@jamesmartin3360 Hi, thanks for the suggestion. We have been out trimming again today with the decalage adjusted and noseweight added back in. We have seen a much better climb and recovery of the model with this adjusted, but, the conditions weren’t ideal as wind speeds were too high to fully evaluate. We will be back out again soon, so all options will be considered to get the Mosquito trimmed. Thanks again for taking the time to watch the video and post your comment. It is all gladly received. 👍🏻
Great video Mark and great to see the Mosquito progressing. I do agree with Ivan though that a slightly more forward cg would be useful and give it a bit more stability to help stop the slight wing drop tendency. That said it is looking very impressive as it climbs away , you are clearly not far away. Hope to see you at Lodge ?
@@squirrelnet28 Thanks Chris! Yeah we arrived at the decalage adjustment and nose weight re-addition at the end of the session. I was amazed to see the effects of such small adjustments on the model as well!
Ivan has decided now that he is not going to fly his models anymore, and just sit on the grass mulling over life and guiding me through the trimming process 😂 Ask him on Sunday about his new chosen path! Ha ha!
I will be attending Lodge mate yes, so i will see you there if you’re going to be there? My dad is also going to come over as well.
@@freeflightscale yes I'm planning to be there :-) see you then
@@squirrelnet28 Excellent! See you Sunday 👍🏻
@@freeflightscale That is great advice. You will learn so much more by trimming a model yourself while having an experienced head looking on.
Of note from the stationary shots it looks like you have counter rotating props but it's difficult to discern the direction of rotation from the videos. The most stable layout is to have both props rotating up and out as the pilot sees it. Under those settings the model should have a straight climb till the velocity reaches equilibrium at the apogee. At which point you have to see whether she wants to turn left or right on her own accord. Obviously keep the turns low otherwise you might lose her. Just my 2 cents.
@@DLLReid Yes having Ivan on hand to assist with the trimming is truly invaluable. His wealth of trimming and flying experience is really helping, and I’m learning from him as we go.
Here’s a link to a video of Ivan’s Hornet - similar wingspan to the Mosquito, and this is also the flight pattern we are aiming to arrive at.
th-cam.com/video/eszpnKVIN1A/w-d-xo.htmlsi=WwhdoqNaw9LZCzMk
The props are indeed counter rotating to combat the torque from the motors, and they do also rotate in the direction you mention. Hopefully we will get some more trimming flights in on Sunday when we head out. Fingers crossed the weather is kind and wind speeds remain low. We may even be able to put a few more turns on, as the area we will be flying in, is much larger and more favourable.
Thanks again for your continued comments on the channel, and your suggestions/input. It is all greatly received!