Alchemy by Bryan Hebert of CK Aero
03-05-2018, 06:42 PM
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03-14-2018, 12:22 PM
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The Alchemy has flown!
Hi Guys,
Well, the Alchemy has flown. It was completed last Wednesday night prior to driving down to the Australian Masters and World Cup in Melbourne. Friday was the official practice day and that afternoon was the first flight of the Alchemy. The flight went very well with a click or two of up elevator trim, no aileron trim but a few clicks of rudder trim. This week I’ll be rechecking the thrust line to see what’s causing the rudder trim and also move the CG a bit further forward to correct a slight KE Pull to the belly. Apart from the KE and rudder trim, the model felt really good. The model now has 7 flights on it after the Comp. I hadn’t flown at all since November last year and had just two P19 practice flights before the Comp. I finished 13th overall which was quite pleasing considering it was a new untrimmed model and my lack of practice.
Also, when one flys a model with a Mohawk, one needs to follow suit with the matching haircut... lol
Cheers,
Jason.
Well, the Alchemy has flown. It was completed last Wednesday night prior to driving down to the Australian Masters and World Cup in Melbourne. Friday was the official practice day and that afternoon was the first flight of the Alchemy. The flight went very well with a click or two of up elevator trim, no aileron trim but a few clicks of rudder trim. This week I’ll be rechecking the thrust line to see what’s causing the rudder trim and also move the CG a bit further forward to correct a slight KE Pull to the belly. Apart from the KE and rudder trim, the model felt really good. The model now has 7 flights on it after the Comp. I hadn’t flown at all since November last year and had just two P19 practice flights before the Comp. I finished 13th overall which was quite pleasing considering it was a new untrimmed model and my lack of practice.
Also, when one flys a model with a Mohawk, one needs to follow suit with the matching haircut... lol
Cheers,
Jason.
03-14-2018, 06:14 PM
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Final Weight
I should also mention the final weight came in at 4722 grams ready to fly. This pleasantly surprised me for a full composite model the size of the Alchemy. The packs used were Hacker TopFuel 4600 which are quite light and drive system is the Ralph Schweizer CRS with Mejzlik props. ESC used is Mezon 95 OPTO Lite.
Cheers,
Jason.
Cheers,
Jason.
03-25-2018, 01:22 PM
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Hi Guys,
I’m not sure how many people are considering an Adverrun XS Contra for their Alchemy’s but I’ve just designed and manufactured a firewall to suit. Pictures below.
The material is 4mm Aircraft grade Finish Ply. The edges will need to be chamfered to suit the taper of the Alchemy nose.
Cheers,
Jason.
I’m not sure how many people are considering an Adverrun XS Contra for their Alchemy’s but I’ve just designed and manufactured a firewall to suit. Pictures below.
The material is 4mm Aircraft grade Finish Ply. The edges will need to be chamfered to suit the taper of the Alchemy nose.
Cheers,
Jason.
Last edited by Jason Arnold; 03-25-2018 at 01:24 PM. Reason: More info added...
06-28-2018, 07:23 PM
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Hi Guys,
It's been a while since I have posted on here. Very busy down under...
Anyway, just thought I'd mention that I've started a build blog on my website. It's almost finished actually. It might help some people putting together their Alchemy.
https://precisionaeroproducts.com.au...emy-build-blog
Cheers,
Jason.
It's been a while since I have posted on here. Very busy down under...
Anyway, just thought I'd mention that I've started a build blog on my website. It's almost finished actually. It might help some people putting together their Alchemy.
https://precisionaeroproducts.com.au...emy-build-blog
Cheers,
Jason.
10-01-2018, 12:42 PM
#57
Guys
I have two Alchemy`s in stock, very rare !
One glow and one Electric.
I`m running a special deal that includes my setup
They are the white version factory scheme as shown on my website
CK Aero | Alchemy | F3A Aircraft | Pattern Plane | Contra Drive
These models are light! between 2300-2350 g for electric and 2400-2450 glow version
You can literally be flying one in a week of assembly!
send me a note here
or email at [email protected]
Bryan
I have two Alchemy`s in stock, very rare !
One glow and one Electric.
I`m running a special deal that includes my setup
They are the white version factory scheme as shown on my website
CK Aero | Alchemy | F3A Aircraft | Pattern Plane | Contra Drive
These models are light! between 2300-2350 g for electric and 2400-2450 glow version
You can literally be flying one in a week of assembly!
send me a note here
or email at [email protected]
Bryan
10-01-2018, 02:44 PM
#58
My Feedback: (3)
I should also mention the final weight came in at 4722 grams ready to fly. This pleasantly surprised me for a full composite model the size of the Alchemy. The packs used were Hacker TopFuel 4600 which are quite light and drive system is the Ralph Schweizer CRS with Mejzlik props. ESC used is Mezon 95 OPTO Lite.
Cheers,
Jason.
Cheers,
Jason.
Based on recent information from Hacker, you may want to consider replacing the 95 Mezon with a 115 Mezon
The 95 is no longer recommended for F3A per Hacker
This is from a thread here started by Bo
The original document from Hacker is in the F3ALorenz website as well
10-01-2018, 04:55 PM
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If the Mezon 95 is not able to handle 95A continuous then it should not be advertised as such. Very simple case of false advertising if this is the case. Current drawn by my CRS/C54 is around 73A at WOT. The average current is far less.
I’m sorry, I don’t see any plausible reason to swap out my Mezon 95 Opto light for a larger controller.
Regards,
Jason.
10-09-2018, 02:48 PM
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Can you point us to more info on this? I use the 95 currently in all my planes.
10-09-2018, 02:51 PM
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10-09-2018, 03:24 PM
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10-09-2018, 04:17 PM
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10-09-2018, 04:47 PM
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10-09-2018, 06:53 PM
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As far as the Mezon ESC,
Here's what Hacker says:
Information from Hacker Motor Service
Dear customers, there are still failures and fires of Master MEZON 90, Mezon 90 lite
and Mezon 95 opto controllers when used in F3A models.
The reason is as follows: These controls are all too small for use in an F3A model!
Reason:
1. Mezon controllers are constructed differently than e.g. Master SPIN controller.
Only a few power transistors are used in the MEZON's (only 6 in the MEZON 90!),
which have to carry the entire current load.
With the SPIN 99, for example, many smaller MosFets are installed, which are distributed
over a larger area on the heat sink.
The heat dissipation is thus much better, the controller has better "taker qualities".
A MEZON 90 is therefore not comparable to a SPIN 99.
2. The phase currents are significantly higher under load than the indicated current in the controller.
A regulator should therefore always be designed 20% -30% stronger.
3. MEZON lite controllers also have a smaller, flatter, heat sink than normal MEZON controllers.
To make matters worse, that this smaller heat sink is also covered all around by the shrink tube of the regulator.
4. A reduction in the regulator opening in the transmitter brings no improvement, on the contrary, the controller gets even hotter in operation, since it has to tackle constantly and never fully through can. Deadly in the summer for the regulator.
Please inform your customers about these things when buying. Our recommendation for F3A use is either a Master MEZON 130 as a BEC controller, or at least a Master MEZON 115 Opto, better a MEZON 135 Opto in the optocoupler version. With these stronger controllers, the Lite version is conceivable, if not optimal.
With our F3A recommendations in the Hacker shop you will find no indication of the small Master MEZON controllers.
The argument for higher weight or additional costs certainly does not apply. When weight difference we speak of about 10 gramm, at the cost of a few euros. If a controller that is too small burns down, the damage is even more costly.
Thanks for your support. With your help we can certainly reduce new failures in the F3A scene.
Here's what Hacker says:
Information from Hacker Motor Service
Dear customers, there are still failures and fires of Master MEZON 90, Mezon 90 lite
and Mezon 95 opto controllers when used in F3A models.
The reason is as follows: These controls are all too small for use in an F3A model!
Reason:
1. Mezon controllers are constructed differently than e.g. Master SPIN controller.
Only a few power transistors are used in the MEZON's (only 6 in the MEZON 90!),
which have to carry the entire current load.
With the SPIN 99, for example, many smaller MosFets are installed, which are distributed
over a larger area on the heat sink.
The heat dissipation is thus much better, the controller has better "taker qualities".
A MEZON 90 is therefore not comparable to a SPIN 99.
2. The phase currents are significantly higher under load than the indicated current in the controller.
A regulator should therefore always be designed 20% -30% stronger.
3. MEZON lite controllers also have a smaller, flatter, heat sink than normal MEZON controllers.
To make matters worse, that this smaller heat sink is also covered all around by the shrink tube of the regulator.
4. A reduction in the regulator opening in the transmitter brings no improvement, on the contrary, the controller gets even hotter in operation, since it has to tackle constantly and never fully through can. Deadly in the summer for the regulator.
Please inform your customers about these things when buying. Our recommendation for F3A use is either a Master MEZON 130 as a BEC controller, or at least a Master MEZON 115 Opto, better a MEZON 135 Opto in the optocoupler version. With these stronger controllers, the Lite version is conceivable, if not optimal.
With our F3A recommendations in the Hacker shop you will find no indication of the small Master MEZON controllers.
The argument for higher weight or additional costs certainly does not apply. When weight difference we speak of about 10 gramm, at the cost of a few euros. If a controller that is too small burns down, the damage is even more costly.
Thanks for your support. With your help we can certainly reduce new failures in the F3A scene.
10-09-2018, 07:10 PM
#66
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As far as the Mezon ESC,
Here's what Hacker says:
Information from Hacker Motor Service
Dear customers, there are still failures and fires of Master MEZON 90, Mezon 90 lite
and Mezon 95 opto controllers when used in F3A models.
The reason is as follows: These controls are all too small for use in an F3A model!
Reason:
1. Mezon controllers are constructed differently than e.g. Master SPIN controller.
Only a few power transistors are used in the MEZON's (only 6 in the MEZON 90!),
which have to carry the entire current load.
With the SPIN 99, for example, many smaller MosFets are installed, which are distributed
over a larger area on the heat sink.
The heat dissipation is thus much better, the controller has better "taker qualities".
A MEZON 90 is therefore not comparable to a SPIN 99.
2. The phase currents are significantly higher under load than the indicated current in the controller.
A regulator should therefore always be designed 20% -30% stronger.
3. MEZON lite controllers also have a smaller, flatter, heat sink than normal MEZON controllers.
To make matters worse, that this smaller heat sink is also covered all around by the shrink tube of the regulator.
4. A reduction in the regulator opening in the transmitter brings no improvement, on the contrary, the controller gets even hotter in operation, since it has to tackle constantly and never fully through can. Deadly in the summer for the regulator.
Please inform your customers about these things when buying. Our recommendation for F3A use is either a Master MEZON 130 as a BEC controller, or at least a Master MEZON 115 Opto, better a MEZON 135 Opto in the optocoupler version. With these stronger controllers, the Lite version is conceivable, if not optimal.
With our F3A recommendations in the Hacker shop you will find no indication of the small Master MEZON controllers.
The argument for higher weight or additional costs certainly does not apply. When weight difference we speak of about 10 gramm, at the cost of a few euros. If a controller that is too small burns down, the damage is even more costly.
Thanks for your support. With your help we can certainly reduce new failures in the F3A scene.
Here's what Hacker says:
Information from Hacker Motor Service
Dear customers, there are still failures and fires of Master MEZON 90, Mezon 90 lite
and Mezon 95 opto controllers when used in F3A models.
The reason is as follows: These controls are all too small for use in an F3A model!
Reason:
1. Mezon controllers are constructed differently than e.g. Master SPIN controller.
Only a few power transistors are used in the MEZON's (only 6 in the MEZON 90!),
which have to carry the entire current load.
With the SPIN 99, for example, many smaller MosFets are installed, which are distributed
over a larger area on the heat sink.
The heat dissipation is thus much better, the controller has better "taker qualities".
A MEZON 90 is therefore not comparable to a SPIN 99.
2. The phase currents are significantly higher under load than the indicated current in the controller.
A regulator should therefore always be designed 20% -30% stronger.
3. MEZON lite controllers also have a smaller, flatter, heat sink than normal MEZON controllers.
To make matters worse, that this smaller heat sink is also covered all around by the shrink tube of the regulator.
4. A reduction in the regulator opening in the transmitter brings no improvement, on the contrary, the controller gets even hotter in operation, since it has to tackle constantly and never fully through can. Deadly in the summer for the regulator.
Please inform your customers about these things when buying. Our recommendation for F3A use is either a Master MEZON 130 as a BEC controller, or at least a Master MEZON 115 Opto, better a MEZON 135 Opto in the optocoupler version. With these stronger controllers, the Lite version is conceivable, if not optimal.
With our F3A recommendations in the Hacker shop you will find no indication of the small Master MEZON controllers.
The argument for higher weight or additional costs certainly does not apply. When weight difference we speak of about 10 gramm, at the cost of a few euros. If a controller that is too small burns down, the damage is even more costly.
Thanks for your support. With your help we can certainly reduce new failures in the F3A scene.
DANGER:
Safety advice for our customers!
Concerns the joint operation of third party receivers and JETI MEZON OPTO controllers
Lately there have been very sporadic problems with the operation of receivers from other manufacturers when connected with a JETI Mezon OPTO speed controller.
Situation:
If, contrary to the safety guidelines, not the drive battery is first switched off by the controller, but first the receiver system, this combination may in rare cases cause the motor to start unintentionally.
CAUTION! Risk of injury!
Since at the moment it is not yet clear which of these receiver / JETI-MEZON-OPTO controller combinations may cause this error, in the interest of your own safety we would like to ask our customers to disconnect the drive battery first and then turn off the receiver power supply first. If this is not possible, we will prescribe a JETImodel Enlink 2RS Plus - DUO signal repeater between third party receivers and JETI MEZON OPTO controllers. We have already informed the relevant manufacturers and will keep you up to date. In the interest of your safety, we would like to draw your attention in this connection once more to the safety and hazard warnings described in the instructions. R / C systems should always be operated with due care and caution. If you have any questions, please contact our service team at any time. Your team of Hacker Motor GmbH
01-22-2019, 11:49 AM
#67
Hi Guys,
Well, the Alchemy has flown. It was completed last Wednesday night prior to driving down to the Australian Masters and World Cup in Melbourne. Friday was the official practice day and that afternoon was the first flight of the Alchemy. The flight went very well with a click or two of up elevator trim, no aileron trim but a few clicks of rudder trim. This week I’ll be rechecking the thrust line to see what’s causing the rudder trim and also move the CG a bit further forward to correct a slight KE Pull to the belly. Apart from the KE and rudder trim, the model felt really good. The model now has 7 flights on it after the Comp. I hadn’t flown at all since November last year and had just two P19 practice flights before the Comp. I finished 13th overall which was quite pleasing considering it was a new untrimmed model and my lack of practice.
Also, when one flys a model with a Mohawk, one needs to follow suit with the matching haircut... lol
Cheers,
Jason.
Well, the Alchemy has flown. It was completed last Wednesday night prior to driving down to the Australian Masters and World Cup in Melbourne. Friday was the official practice day and that afternoon was the first flight of the Alchemy. The flight went very well with a click or two of up elevator trim, no aileron trim but a few clicks of rudder trim. This week I’ll be rechecking the thrust line to see what’s causing the rudder trim and also move the CG a bit further forward to correct a slight KE Pull to the belly. Apart from the KE and rudder trim, the model felt really good. The model now has 7 flights on it after the Comp. I hadn’t flown at all since November last year and had just two P19 practice flights before the Comp. I finished 13th overall which was quite pleasing considering it was a new untrimmed model and my lack of practice.
Also, when one flys a model with a Mohawk, one needs to follow suit with the matching haircut... lol
Cheers,
Jason.
Thanks, Gary
01-22-2019, 01:48 PM
#68
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What was the final fix for your rudder trim? My Allure tracks to the right on a long up-line. I've had to add 5 clicks of left rudder to compensate. Running Contra V4. Stabs, wings and motor thrust have been checked several times. CG is just aft of the wing tube.
Thanks, Gary
Thanks, Gary
I’ve had a few gremlins with my rudder trim. I’m happy to report that it seems to have been fixed (fingers crossed). My rudder trim was changing intermittently during or before a flight by ~6%. You can imagine what that does to a pattern plane.... Anyway, after much time, I narrowed the problem down to my Jeti DC-24 transmitter. It was sent back to the factory for repair. They weren’t unable to replicate the fault (so they say) but did reload the firmware and replace a “PC board”. The radio has got about 17 flights on it since repair and the rudder trim is stable. I think they have nailed it.
Cheers,
Jason.
01-22-2019, 02:50 PM
#69
Hi Gary,
I’ve had a few gremlins with my rudder trim. I’m happy to report that it seems to have been fixed (fingers crossed). My rudder trim was changing intermittently during or before a flight by ~6%. You can imagine what that does to a pattern plane.... Anyway, after much time, I narrowed the problem down to my Jeti DC-24 transmitter. It was sent back to the factory for repair. They weren’t unable to replicate the fault (so they say) but did reload the firmware and replace a “PC board”. The radio has got about 17 flights on it since repair and the rudder trim is stable. I think they have nailed it.
Cheers,
Jason.
Gary
03-18-2019, 12:27 PM
#70
Alchemy and Allure built up wings and stabs
Guys A update,
I now offer Wood built up wings and Stabs for the Alchemy and Allure Bipe from kit form, simi built , sheeted ready to cover, Or completely covered.
This can save some weight if you need to or available for builders kits.
Send me a note if your interested.
Bryan
CKAero.net
I now offer Wood built up wings and Stabs for the Alchemy and Allure Bipe from kit form, simi built , sheeted ready to cover, Or completely covered.
This can save some weight if you need to or available for builders kits.
Send me a note if your interested.
Bryan
CKAero.net
05-01-2019, 01:28 PM
#71
https://youtu.be/RMegxI1bP5Y
a little video for you guys
Bryan
Bryan
CK Aero is about to release a great new F3A airframe called the Alchemy. This airframe is the result of two years of extensive testing and improvement.
Features:
More details will be published when available.
Cheers,
Jason.
Features:
- Lighter layup.
- Redesigned wings and stabs.
- Taller fin and rudder with no counter balance.
- New style lighter, plug in all composite landing gear.
- Larger shaped, more forward canopy (a clear polycarbonate option coming soon)
More details will be published when available.
Cheers,
Jason.
07-26-2019, 10:17 PM
#73
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battery tray
jason
can you please give some picture off your battery instal in the airplane
i like your model battery try but like to see some more pictures
and like to see where you mound the rx battery and reciever
thank you marco
can you please give some picture off your battery instal in the airplane
i like your model battery try but like to see some more pictures
and like to see where you mound the rx battery and reciever
thank you marco
07-27-2019, 03:15 PM
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Here are a couple of pictures of my battery tray and RX position.
I'm using 4600mAh Hacker TopFuel packs and they are just in front of the UC gear module.
Regards,
Jason.
