TopRCModel FW-190
03-03-2018, 10:10 PM
#126
Because the extra load on the engine facilitates lean running, hence over heating if not properly accounted for. This is not the full scale FW 190. The fan on the full scale was on a gear reduction, not spinning the same rpm as the prop.
Again, good for static display in competition, otherwise.... ho hum! Nobody is gonna care about your scale cooling fan spinning while it is flying. But they will when you are fighting deadsticks from lean runs. In the immortal words of Dave Platt : "It has to fly". I find it best to set up my model airplanes to do just that. These are not the full scale, just a representation.
03-03-2018, 10:57 PM
#127
I would imagine someone would tune their engine with that fan unit in place so would be compensated for. But you're also right in the fact the fan will add load and if there's pressure change for the carb air, the extra load will exacerbate a lean situation.
Last edited by Katniss; 03-03-2018 at 11:02 PM.
03-06-2018, 05:20 AM
#129
Spent some time working on the main gear install. First, I had to trim off the extra material at the retract mount. Rail spacing was fine but it sat to low in the wing causing interference between the retract and upper wing.
Trial fitted two pieces of 1/8" plywood on top of the rails to help this issue. Layed the retract back down and found that the wheel and strut would be to low in the wheel well. I installed two 1/8 plywood shims ...1/4".... on both upper
part of the mounting rails. With this the wheel and strut sat perfectly in the wheel well and the strut was parallel to the wing surface. Then loaded up the rail mount with West System thickened epoxy before laying down the
plywood piece on top
Trial fitted two pieces of 1/8" plywood on top of the rails to help this issue. Layed the retract back down and found that the wheel and strut would be to low in the wheel well. I installed two 1/8 plywood shims ...1/4".... on both upper
part of the mounting rails. With this the wheel and strut sat perfectly in the wheel well and the strut was parallel to the wing surface. Then loaded up the rail mount with West System thickened epoxy before laying down the
plywood piece on top
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gixer47 (08-12-2023)
03-06-2018, 09:38 PM
#132
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Because the extra load on the engine facilitates lean running, hence over heating if not properly accounted for. This is not the full scale FW 190. The fan on the full scale was on a gear reduction, not spinning the same rpm as the prop.
Again, good for static display in competition, otherwise.... ho hum! Nobody is gonna care about your scale cooling fan spinning while it is flying. But they will when you are fighting deadsticks from lean runs. In the immortal words of Dave Platt : "It has to fly". I find it best to set up my model airplanes to do just that. These are not the full scale, just a representation.
Again, good for static display in competition, otherwise.... ho hum! Nobody is gonna care about your scale cooling fan spinning while it is flying. But they will when you are fighting deadsticks from lean runs. In the immortal words of Dave Platt : "It has to fly". I find it best to set up my model airplanes to do just that. These are not the full scale, just a representation.
The first Fan is almost ready. needed to do some tweaking on the printer to get this fan perfect but it looks good now.
Rev
03-07-2018, 05:34 PM
#134
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Got my Robart replacement retracts from Mike at Gator RC today. Spent this afternoon getting them installed and so far seem to be working great. They are a lot more robust than the TopRC gear. The design is not at all like the TopFlite FW190 gear. I had to add a 1/8” plywood spacer to each side of the mount to stop the wheel from hitting the top of the wheel well. I told Mike I would use the TopRC tail wheel as it fit so good. Engine is mounted(Saito FG90), fuel tank and fuel system, panel for air, fuel, and switches are installed, radio and servos in and working. I think this this is almost ready to go. The last thing is a fan unit that Philipp (Reverend) is working on for us. The design should fit the stock spinner and just have a few mm clearance on the cowl. Can hardly wait to see it.
John
John
03-08-2018, 04:34 AM
#135
Got my Robart replacement retracts from Mike at Gator RC today. Spent this afternoon getting them installed and so far seem to be working great. They are a lot more robust than the TopRC gear. The design is not at all like the TopFlite FW190 gear. I had to add a 1/8” plywood spacer to each side of the mount to stop the wheel from hitting the top of the wheel well. I told Mike I would use the TopRC tail wheel as it fit so good. Engine is mounted(Saito FG90), fuel tank and fuel system, panel for air, fuel, and switches are installed, radio and servos in and working. I think this this is almost ready to go. The last thing is a fan unit that Philipp (Reverend) is working on for us. The design should fit the stock spinner and just have a few mm clearance on the cowl. Can hardly wait to see it.
John
John
03-10-2018, 08:00 PM
#136
I've been in contact with most of the german guys who bought the Topflite sized Fan from me an none have claimed overheating issues. The Fans have a profiled blade which helps scoop air into the cowl so on my TF 190 the temp. on the FG84 actually went down by about 5°C. It does however cost you about 100-130 RPM. You do need to check, that the air has someplace to get out of the cowl though! Otherwise the warm air will stay in there and you will have overheating problems again.
The first Fan is almost ready. needed to do some tweaking on the printer to get this fan perfect but it looks good now.
Rev
The first Fan is almost ready. needed to do some tweaking on the printer to get this fan perfect but it looks good now.
Rev
03-12-2018, 05:50 AM
#138
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Got my Robart replacement retracts from Mike at Gator RC today. Spent this afternoon getting them installed and so far seem to be working great. They are a lot more robust than the TopRC gear. The design is not at all like the TopFlite FW190 gear. I had to add a 1/8” plywood spacer to each side of the mount to stop the wheel from hitting the top of the wheel well. I told Mike I would use the TopRC tail wheel as it fit so good. Engine is mounted(Saito FG90), fuel tank and fuel system, panel for air, fuel, and switches are installed, radio and servos in and working. I think this this is almost ready to go. The last thing is a fan unit that Philipp (Reverend) is working on for us. The design should fit the stock spinner and just have a few mm clearance on the cowl. Can hardly wait to see it.
John
John
. Ignoring my mails, even though they accepted (together with TOPRC) that there is a problem with the TopRc landing gear. Poor service
Last edited by Kh@n; 03-20-2018 at 05:23 AM.
03-24-2018, 02:35 AM
#150
Hi PTDan. Somebody mentioned in one of the earlier replies that they were going to put the Saito in. This is an option i am quite keen on. Your FW looks stunning by the way.
Kind Regards
James
Kind Regards
James