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Posted by VicT | Nov 30, 2020 @ 10:07 AM | 6,663 Views
Instructor over ride instructions

From page 227 of iX12 manual but applies to any talking DX transmitter.

Tips: fly the model with the student’s transmitter first. Trim her out so the first flight can be easy with hands off whether it be SAFE On or Off. Land and export the student’s settings on to an SD card so that the Instructor transmitter has the same settings. Import the settings into the Instructor transmitter. Insert an IP after the model name (to designate which is master) and proceed to System Setup.....Trainer..... and Wireless Trainer. Push on the Inhibit box so that it flashes and roll once to the right. You will see the box “Programmable Master” flashing. Press once to stop the flashing and scroll down to the box labeled Switch I. Now switch I is the old fashion 1980 method. Your finger will get tired of pushing the button all the time and a dent will be put into your finger pad. Use the technology! Press on the I switch box so it blinks and toggle a switch. I use the A switch because it is a two position switch that is easy to locate (at the top left corner). The audio will be set up automatically “Instructor has control” or “Student has control”. However if you use a 3 position switch (position C2 for example) you will not hear anything. You can leave this as mystery to figure out inflight or spend about 5 minutes going into the Digital Switch menu to change the numbers and then going into Custom Voice Events and finding the phrase in...Continue Reading
Posted by VicT | Nov 26, 2020 @ 12:58 PM | 3,262 Views
I found a loose stab on preflight caused by a broken CF stab joiner. I separated the 2 pieces and used the shattered ends as ends for the tube . I used CA and Monocote backing to glue the cracks shut. I found an inner CF tube and turned it down with 80 grit paper while spinning it in a Dremel. I used about 1.5 inches to joine he 2 clean ends together using CA.
I has to insert the repaired tube into the plastic fuselage hole one way as there was a repair bump that restricted entry.
This plane and parts are discontinued so parts are hard to get
Posted by VicT | Nov 04, 2020 @ 02:34 AM | 7,124 Views
This is the black Mirage with a 20 mm BL inrunner that was run on 8 Nimhs. Fan is 5 blades and 63 mm. I think it was a GWS or Wattage. It has fixed gear and last flew a long time ago. Lots of noise but not much speed. I was going to tru her with a 1300 3S but the ESC failed. I removed the fan to put a tractor set up for a quite but fast sport flyer.
Posted by VicT | Nov 02, 2020 @ 09:14 AM | 5,051 Views
Here are some tips to improve your taxi skills:

*Use full up elevator so prop wash forces the tail wheel down to the surface.
*Use high rate and/or SAFE Off to increase servo throws to the tail wheel. Use SAFE On for actual takeoffs as any wing lifting can be automatically corrected as soon as it occurs.
*Use throttle very carefully as too much throttle can cause right yaw. Advance throttle very slowly to “break away thrust” then reduce just a little to maintain a slow taxi speed.
*Remove wings for practice so no accidental takeoffs occur
*Use aileron into the wind to reduce crosswinds lifting a wing. Use spoilers while taxiing to increase weight on wheels.

For Spektrum radios that have a throttle cut screen use the Throttle Delay feature in the Throttle Cut menu:
Change the Delay from INH to 5.0 seconds. Cut the throttle, advance the throttle to take off power, un cut the throttle (H switch) and concentrate on left stick rudder control. Reduce up elevator 2 or 3 seconds later and use prop wash over the rudder to maintain directional control. Once in flight the throttle reacts normally with no delay. For subsequent take offs repeat the same procedure.
Posted by VicT | Oct 25, 2020 @ 05:58 AM | 3,130 Views
I got to maiden Jack W’s new Eflite Extra at Odessa Fl after a WPMPA club meeting. The 300 is popular with at least 3 other club members in our 100 member club. I know that some aluminum motor mounts have caused vibration and have failed leading to replacement. The music wire landing gear can get bent and I have retrofitted the 300 with a Dubro 40-60 nylon gear legs. This gear does not break or bend and can be screwed or bolted further forward to reduce nose over damage while moving on the surface. most likely Horizon will discontinue the 300 and fix the design adding a 637T for telemetry. Cost will increase but it will be worth it in my opinion.

Jack wanted to preserve the nice fragile stock prop from such nose over damage so replaced it with an APC plastic 13/6.5 prop. On run up on a 4S she caused severe vibration. The factory spinner was removed and this helped but the prop was removed and rebalanced. This still caused vibration. Luckily Manny came to Jacks aid with a brand new 13/4 APC still in the package. The bore was reamed out enough to easily clear the shaft adapter and the largest plastic ring was pressed into place. This took away all vibration (no balancing required using the ring) however when the nice looking plastic backplate and spinner was added the vibration returned. So the maiden was completed with out the spinner and backplate. Jack’s Wattmeter measured 45 A , 670 W on a 3600 4S Venom and 31 A 334 W on a Venom 3200 3 S. We got 8 min of...Continue Reading
Posted by VicT | Oct 23, 2020 @ 09:47 PM | 5,728 Views
The free flight models use a de thermalizer system to stop the model from flying away. I wanted to do the same with the Elf and came up with a system that uses the flying stab to stop forward motion and bring the Elf vertically down. I programmed the elevator rate switch C2 to give full up that stalls the model but keeps the model level as it descends. If I release full up elevator the mode resumes flying. The Elf has to slow down gradually before applying full up elevator to get the correct level attitude before the descent starts. My low rate C0 switch postion is programmed for the Launch mode. I have elevator trim set for a high speed throw with about a 80 degree climb angle. At top of climb I can keep her in Launch mode for aerobatics or move the switch to C1 for Cruise Mode with a little more up elevator, or go into Thermal Mode C2 with more up elevator. I have the rates adjusted so that full up stick gives me the correct elevator angle for a vertical fuselage level descent. The Expo is adjusted so that normal elevator travel is available but full stick gives me full up elevator.

In flight adjustment is required to find the correct angle. An incorrect elevator angle will cause a porpoise descent or stall repetition. To prevent a nose down crash release full up elevator to recovery from the stall/crash manuever. Your CG will have an effect on the angle. My CG is slightly forward (2.9 inches) from what Vladimir’s 2.9-3.3 inch range....Continue Reading
Posted by VicT | Oct 23, 2020 @ 09:01 PM | 5,575 Views
After the 6 year old 250 mah 1S battery failure the crash broke the phenolic rudder horn and nylon stab fixture. I used thin CA and accelerator to re secure the nylon to CF boom bond. For the rudder horn I replaced it with aluminum that is bent 90 degrees for a stronger bond to the fiberglass rudder skin. I measured the music wire diameter and used some spare wire to drill a hole in the aluminum for a no slop fit. To fill the void around the rudder slot I used brown Gorilla Glue to expand and fill in the void. I have about 20 throws with no cracking or damage to the repair areas.
Posted by VicT | Oct 23, 2020 @ 08:52 PM | 5,311 Views
I bought my Elf from Kennedy Composites in Jan 2014 and have about 35 hours indicated on my DX9 transmitter. She has an AR400 with out the case and Dymond D47 servos for elevator and rudder. I purchased the Shread-RC 240 mah 1S voltage booster/charger.

Last week on the 5th or 6th throw she lost power to the receiver and Elf impacted the soft ground hard enough to break the CA glue bond for the plastic stab fixture. I checked battery voltage and with 2 beeps this figures out to 3.5 + .2+= 3.7. However after cycling the rudder for about 20 seconds the red power LED extinguished. So with 6 years of use I figured it was time for some preventative maintenance.

I emailed [email protected] but with no response I purchased a 300 1S lipo from Racedayquads.com . The Shread-RC 250 battery weighs 6 gm and the RDQ 300 weighs 8 gm. It is longer than the 250 but fits on the boom between the servo and the boom nose. I cut the red and black wires and soldered them together then taped the battery and booster to the boom to locate the charging prongs and canopy opening. After finding the correct position I used Shoe Goo to secure the battery and booster to the boom. I recently got about 20 throws at the park with 10-12 winds and found no change in handling or CG.
Posted by VicT | Oct 18, 2020 @ 10:39 PM | 6,104 Views
I’ve been catapult launching my 64 gram Fox EPP free flight glider using 3 #64 rubber bands. They are tied to the end of a stick handle held in the feet hand. When stretched back about 2 ft and released the Fox climbs consistently up to about 30-40 feet. I’m a teaching my friends 7 yr old son how to launch and the effects of trim and CG.

Recently I started to fly my 4 ounce Elf with rudder and elevator. It’s got a wing tip blade for DHLG soft or hard throws however I wanted to see what a catapult system would be like. So I fashioned a music wire hook to the Elf Carbon fiber boom and used Gorilla glue for reinforcement. I will be using different rubber and bungee bands for experimentation. I have a stomp launcher that could be used as well. The objective is to have consistent launch angles and direction for indoor or outdoor confined space flying sites.

I tested Elf with winds 15-18 in a small park with 60 -80 ft trees surrounding the center field. I practiced tip launching about 20 times circling the wind shears. As long as Elf has airspeed over the rudder and stab you have good control. However a sudden tailwind wind shear can temporarily cause loss of control.
I used a stick with 3 # 64 bands and held it with my left hand and transmitter hand strap. I was able to get good smooth launches but only about 15 ft high where as tip launches were about 75 ft. So rubber has to be experimented with.

On post flight inspection the temporary hot glue repair to the rudder horn showed play. At home I made an aluminum rudder horn and bent it 90 degrees for a stronger glue joint. I used a rotary dental tool to rout out the old epoxy in the slot and used brown Gorilla glue this time. A clothes pin was made into a clamp while it hardens over night. A tube will be lashed to my DX9 to hold a launching dowel.
Posted by VicT | Sep 20, 2020 @ 11:21 PM | 3,870 Views
Mike K purchased a used Mini Apprentice from Mike B. This 48” span model will be able to handle winds better than his 4 ounce UMX Turbo Timber. I programmed his DX6 and trimmed her out with SAFE OFF then turned SAFE On. Every maneuver checked good except for aileron to rudder mix that I put into the transmitter. I did not know that it was already programmed into the AR636 A receiver. I think she went cross control similar to the larger Apprentice with the older Apprentice SAFE receiver. There was minimum damage and after replacing the stock prop with an APC 9/6E and inhibiting the TX aileron/rudder mix she flew fine. I like her more than the larger Apprentice because of the Re designed stab. This Apprentice came without a nose wheel and had been in a nose down crash as evidence from the compression wrinkles and a new cowl. I brought her home to make some improvements such as:
1. Adding a steerable tailwheel
2. Programming the ESC prop brake
3. Trimming the stock spinner to fit the APC9/6 prop
4. Glueing the bindplug receptacle to the fuselage side
5. Moving the 18 amp ESC forward to the motorway for more cooling air
6. Adding cloth covered bungee bands to replace the 6 rubber bands.

See pics and notes

The replacement motor melted the plastic motor mount and had to be repaired/replaced. I repaired it with thin aluminum sheet and went to a lesser KV motor the Conscendo Advanced 110 0 KV motor. Less amps but still enough power for sport ops. See...Continue Reading
Posted by VicT | Sep 17, 2020 @ 10:49 AM | 2,547 Views
An inverted crash can occur in a number of ways with the Conscendo BNF (SAFE is installed and Off).
A common cause is to roll inverted and then mistakenly pull up elevator to climb and you dive down. If you have enough altitude you can pull out level with out hitting the ground surface. This Immelmann aerobatic manuever is a simple one but if you mis judge the amount of airspace needed then you have to abort and roll level and pull to level. This takes practice and is risky.
Another cause of an inverted crash happened to me a few weeks ago. I was demonstrating the CE in a power off dive with SAFE On. After pulling level at about 20 ft AGL (above ground level) I pulled my DX9 B switch to 2 (SAFE Off), pulled up and added full power. I then went into a full aileron roll and with in 2 seconds I was diving into the soft ground. I had forgot to turn my aileron to rudder mix off and the rudder input stopped my climb attitude at the first 90 degree bank. When I knew the crash was imminent I did close the throttle and post impact damage looked very bad but amazingly the motor and electronics still worked! The nose had broken away and was easily repaired. The pic shows the front wing bolt fixture.
I was going over how to prevent this from happening again and thought of using the throttle to turn the aileron to rudder mix off automatically. I usually do aileron rolls at full power and use aileron to rudder mixing when flying slow or when cruising at half power. Here is what I do now for the aileron to rudder mix program:

The first thing to do is press/roll to System Setup then F-Mode Setup, then for Switch 1 set Thr. Stick. I usually set Switch 2 to Switch D but you don’t have to do this unless you want more nice things to have.
Next press the Back button and go to the function menu and scroll to Mixing. The pics below show BC and AC.
Posted by VicT | Sep 15, 2020 @ 10:43 PM | 4,158 Views
The bolts fall out from there wing cover holes and are easily lost. I previously was rolling paper and glueing it inside the plastic tube. This worked until I assembled the wing but lost one of the bolts. Paper and glue work most of the time but I wanted something stronger that would last longer. I cut a slot in a 7/32 inch brass tube and then cut a 1/4 inch long section. The tube is a little loose in the tube but expanding the slot the tube fits snug in the plastic tube and a little Gorilla insures she stays in the tube. Don’t forget to put the 3 mm wing bolt in the tube first. I cut down a 4 mm Phillips head bolt and had to reduce the diameter of the head because it was hard to fit into the tube.
Posted by VicT | Sep 13, 2020 @ 06:40 AM | 2,596 Views
Background.....
Sat Sep 12 was sunny and 85 F with 18 mph steady winds E at WPMPA. CA was tested fine with the plywood reinforcements and new Y cable. After a few minutes my eager 6 yr old student (Gabriel) started flying at 150 ft doing S turns into the wind. He has been steadily improving over the last 4 Saturdays and is less erratic with porpoising and pitch control. However flying into the sun and lateral control and situational awareness still needs improvement thru experience. I would add full power to regain altitude and he would repeat. The sun was almost overhead and a few times I would block the sun with my TX and steer the CA away from the sun.

Events leading up to loss of sight....
However on the 3rd recovery the CA got downwind aft of the metal roof and when I regained sight of her she was pointed straight back for return at about 150 ft altitude. However there was no response to throttle and I set up a slight nose down glide in an effort to achieve groundspeed. Due to the 18-20 mp winds at altitude and no groundspeed there was no progress at returning to the helicopter landing area. I left the flight line and crossed under the roof to re acquire the CA but the CA had gone behind the tree line.

Search.....and recovery......
John B was at the south end and watching from a different angle and observed CA entering the west swamp /tree line but was unsure of the exact entry. John, Mark S and I started a search and after 10 min John sighted CA...Continue Reading
Posted by VicT | Sep 10, 2020 @ 10:06 PM | 2,280 Views
The bolted on wing reduces the fuselage from twisting and turning. However by adding a 7gram plywood stiffener over the wing opening you can practically eliminate all torsional twisting and deformation. Plywood that is 1/32 or 2.5 mm thick is glued over the wing saddle. Gorilla glue was used and the bolted on wing secured the plywood while the Gorrilla glue dried.
Posted by VicT | Sep 09, 2020 @ 04:06 PM | 2,523 Views
Both my Conscendsos are getting lots of use and abuse. Especially the thin fuselage/fin area. Yesterday I was demonstrating to some prospective CE owners how to land and then takeoff again. Call it a glider slide and go. If you touch down with a slight nose down attitude and enough speed the elevator will rotate the fuselage high enough for the prop to unfold and provide climb out thrust.

I did this about 3 times and on post flight saw a foam crack. The phenolic belly stiffener had broken away from the foam. I usually use 1 ounce glass cloth and medium CA to reinforce compound curves as the skin is the best place to reinforce. However I wanted to try a quicker, easier and less expensive method using thin 1/32 or 1,5 mm plywood.

Here is a link to the CA thread:
https://www.rcgroups.com/forums/show...postcount=2636
Posted by VicT | Sep 03, 2020 @ 01:09 AM | 4,116 Views
Will be testing the smaller wing on the X440 fuse. It is thinner, lighter and smaller. Same design as the open bay but with a slightly different poly break design. Red Monocote.

Put my 850 4S lipo full forward for CG but dive test indicated too nose heavy. Wing warp caused right turn. Used full left ruddervator trim. Tried taking warp out with twisting wing in sun with weights but after 30 min it did not work. Must use heat gun to put wash out in left panel to match right panel wash out.

She flew fine being a little faster with a smaller turning radius and more vertical thrust due to less weight. This wing will be used when stock wing is put away for windier weather flying.
Posted by VicT | Aug 25, 2020 @ 09:41 PM | 6,162 Views
5 mm shaft
157 gms
900 KV
Wires state 3720 900
O.D. 37.2 mm
Stock ESC 45 amps, 12/8 prop, 3 S

Others have gone to a 60 amp ESC and 11/7 on 4S
Posted by VicT | Aug 23, 2020 @ 01:15 PM | 5,989 Views
The old Etomic transmitters that came with the Vapor and Ember work great for introducing first time flyers or copilots. Make sure the batteries are new and not corroded! Use your full size tally transmitter as instructor and see this link for more info:

https://www.rcgroups.com/forums/show...&postcount=934
Posted by VicT | Aug 22, 2020 @ 11:39 PM | 6,389 Views
I cut flaps out and used a single servo to pull them down against a torsion spring but burned a 9 gram servo up. So I used a Hitech HS 80 for each flap and used a Y cable to plug into ch 5 of the 637 TA RX. In thermal mode the flaps go down about 3 degrees to match the ailerons that are in ch 2 and 6. In the landing mode the flaps go down about 80 degrees and the ailerons reflex up about 10 degrees. To make connecting easier I used Deans 4 pin plugs to combine power and signal wires. See pics
Posted by VicT | Aug 20, 2020 @ 10:19 PM | 3,828 Views
The CE with SAFE On climbs in a vertical 90 degree attitude and with rudder will do a stall turn and dive down. However today the CE ended up inverted in a 45 degree nose down dive. I tried to apply elevator but there was no elevator. She landed in a large bush at the edge of the flying field and was recovered. Later that day I held the fuselage in the same attitude with a 45 nose down inverted dive with SAFE On. I applied up elevator but there was no up elevator but DOWN elevator! It was if it knew that the quickest way to level was to apply down elevator even though I was overriding with up elevator! With SAFE Off normal travel and direction resumed.

So in the event that SAFE is not recovering from an unusual attitude it’s recommended that SAFE be turned off and manual recovery be initiated if the model can be seen.